JP2000332797A - Transmission system and transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To load a control program from a master station to a slave station even when an operator does not operate a control section identification code transmission switch of a slave station. SOLUTION: Communication, up to a slave station whose identification information is not stored in a master station 11, is made available in slave stations 10a, 10b which are connected to a master station 9 via a bus type transmission line 2, and communication to a downstream side from the master station 11 is made unavailable. Then new identification information acquired by the master station 11 from any of communication available slave stations is recognized as the identification information of a most downstream slave station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus-type transmission system and a transmission apparatus used for controlling various devices mounted on a railway vehicle, for example.

[0002]

2. Description of the Related Art There is a bus configuration as a connection configuration between a transmission device of a master station and a transmission device of a slave station. For example, a bus configuration may be adopted in a transmission system mounted on a railway vehicle.

FIG. 8 is a block diagram showing an example of a transmission system employing a conventional bus configuration. A bus type transmission line 2 drawn from a master station 1 is connected to each of the slave stations 3a to 3e. 4 are configured.

[0004] The slave stations 3a to 3e are used to locally control the operation of various devices such as a door opening / closing device 4a, an electric light device 4b, a cooling / heating device 4c, and drive motors 4d and 4e provided in a railway vehicle. Device.

The slave stations 3a to 3e can execute various control programs, and execute processing by loading control programs corresponding to the devices 4a to 4e controlled by the slave stations.

On the other hand, the master station 1 performs a control operation on the whole of the slave stations 3a to 3e to open and close the door on one side,
ON / OFF of electric lights, speed adjustment of the entire railway vehicle, and adjustment of cooling and heating are realized.

[0007] Between the master station 1 and the slave stations 3a to 3e, a destination is specified (designated) using a control unit identification code dedicated to each station.
Then, communication is performed.

In such a transmission system 4, for example, when an arbitrary slave station connected to the bus-type transmission line 2 is replaced with a new slave station due to a failure or the like, or when a new slave station is replaced with the bus-type transmission line 2 If the slave station is installed in the vehicle before the control program is loaded into the control unit in the new slave station, the master station 1 determines that the control unit identification code of the new slave station is Normal communication (communication specifying a new slave station) cannot be performed because it is unknown.

For this reason, conventionally, the control unit identification code is transmitted to the master station 1 by depressing the control unit identification code transmission switch installed in the new slave station. Communication with a specified slave station is possible.

FIG. 9 is a block diagram showing an internal configuration of a conventional transmission device of a slave station.

The conventional slave station 3 is a slave station 3a shown in FIG.
3e, and mainly transmits and receives data via the I / O unit 5 for interfacing with external devices (various devices mounted on railway vehicles) and the bus-type transmission path 2. The transmitting and receiving unit 6 includes a control unit 7 that controls the operation of the slave station 3 and a control unit identification code transmission switch 8.

The control unit 7 executes a basic program 71 including a process of controlling communication using the transmission / reception unit 6, and is a program loaded from the master station 1 for controlling a control target for a control operation. The program 72 is executed.

The control unit identification code transmission switch 8 notifies the control unit 7 when pressed by an operator, and the basic program 71 of the control unit 7 transmits the control unit identification code via the transmission / reception unit 6 to the master station 1. Send to

Hereinafter, the operation of the transmission system 4 will be described.

The new slave station 3 is connected to the bus-type transmission line 2 in a state where the basic program 71 has been installed in the control unit 7 but the control program 72 has not been installed.

After the connection, the control unit identification code transmission switch 8 is pressed by the operator, and the control unit identification code of the slave station 3 is transmitted to the master station 1 by the basic program 71.

Thereafter, when the master station 1 uses the slave station 3 as a communication partner, communication is performed using the control unit identification code. Thereby, the control program 72 suitable for the slave station 3
Is loaded from the master station 1 to the slave station 3. For example, when the slave station 3 is the slave station 3d connected to the drive motor 4d, a control program 72 for controlling the drive motor is introduced.

[0018]

However, in the case of the transmission system 1 for a railway vehicle as described above, a new slave station 3 is installed in a place where it is difficult for workers to operate such as under the floor or ceiling in the vehicle. In many cases, pressing the control unit identification code transmission switch 8 requires much labor and time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when a bus-type transmission line is used, transmission that automatically specifies a communication partner from a master station to a slave station is specified. It is an object to provide a system and a transmission device.

Further, even when the control program is not installed in the control means of the slave station, the master station can normally determine the identification information of the slave station, and the operator can control the control unit identification code transmission switch. It is an object of the present invention to provide a transmission system and a transmission apparatus capable of automatically loading a control program into a control unit of a slave station without the above operation.

[0021]

SUMMARY OF THE INVENTION The gist of the present invention is to communicate between a slave station connected to a master station via a bus-type transmission line and having no identification information held in the master station. Enables communication, disables communication downstream from the master station, and identifies the most downstream slave station that can communicate new identification information acquired by the master station from any of the slave stations that can communicate. The point is that it is recognized as information.

Hereinafter, specific means taken for realizing the present invention will be described.

According to a first aspect of the present invention, in a transmission system in which a master station and at least one slave station are connected via a bus-type transmission line, the master station is associated with each slave station, and the self is associated with the master station. At least one switching means for enabling / disabling communication downstream of the connected position of the slave station, and identifying at least one slave station in a state capable of communicating with the master station. Identification information acquisition means for acquiring information, and identification information not held by the master station among identification information acquired by the identification information acquisition means, connected to the most downstream side among slave stations capable of communicating with the master station; A recognizing means for recognizing the identification information of the slave station which is being recognized, and a switching means which is associated with the slave station for which the identification information is recognized by the recognizing means and which cannot perform communication to the downstream side. Switch to a state where communication is possible A transmission system and a that switching determination unit.

In the transmission system according to the first aspect of the present invention, when the master station acquires the identification information of a new slave station that has not been held, the new identification information is transmitted among the slave stations that can communicate. Is recognized as the identification information of the slave station connected most downstream.

Therefore, the master station automatically recognizes the identification information and the connection position (arrangement position) of the slave station newly connected to the bus-type transmission line, and is installed in a place where the new slave station is difficult to operate. However, communication in which the other party is specified can be performed between the new slave station and the master station.

The second invention is a transmission system in which a control program transmitting means for transmitting a control program corresponding to a slave station is added to the transmission system of the first invention.

In the transmission system according to the second aspect of the present invention, the communication between the master station and the new slave station can be specified, and then the new slave station is connected from the connection position of the new slave station. Select a suitable control program and automatically load.

The third to ninth aspects of the invention relate to a transmission device of a slave station in the transmission system of the first or second aspect.

A third aspect of the present invention relates to a transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, wherein the transmission device of the slave station is located downstream from its own connection position when viewed from the transmission device of the master station. Switching means for enabling / disabling communication, identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station, A slave station transmission apparatus comprising: a switching determination unit that switches a switching unit that has been unable to communicate downstream to a state in which communication to the downstream is possible after receiving a transmission request.

The transmission device of the slave station according to the third aspect of the present invention enables communication downstream from the transmission device after the identification information of the slave station is transmitted to the transmission device of the master station.

Here, the timing for switching the switching means in a state where communication cannot be performed to the downstream side to the state where communication is possible is set to be after the reception of the identification information transmission request. The time includes a time when the control program is transmitted to the master station transmission device, a time when the control program is received from the master station transmission device, a time when the control program is activated, a time when the control program is introduced, and the like.

A fourth invention is a transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, wherein the transmission device of the slave station is located downstream from its own connection position with respect to the transmission device of the master station. Switching means for enabling / disabling communication, identification information transmitting means for transmitting its own identification information to the transmission device of the master station at predetermined intervals, and determining that communication to the downstream side is impossible after transmission of the identification information. And a switching determining means for switching the switching means to a state in which communication to the downstream side is possible.

In the fourth aspect, the slave station transmits identification information to the master station at predetermined intervals.

According to a fifth aspect of the present invention, there is provided a transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, wherein the transmission device of the slave station is located downstream from its own connection position with respect to the transmission device of the master station. Switching means for enabling / disabling communication, identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station, Control means for executing the control program when the control program addressed thereto is received from the transmission device of the master station, and when the control program is not executed by the control means, sets the switching means to a state in which communication cannot be performed to the downstream side. This is a slave station transmission device comprising: a switching determination unit that sets the switching unit to a state in which communication can be performed to the downstream side when the program is being executed.

In the slave station according to the fifth aspect of the present invention, a control program suitable for the slave station is acquired by the slave station after communication between the master station and the slave station in which the other party is specified is enabled. In addition, the device connected to the slave station can be appropriately controlled.

A sixth invention is a transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission path, wherein the transmission device of the slave station is located downstream from its own connection position with respect to the transmission device of the master station. Switching means for enabling / disabling communication, identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station, When receiving a control program including a process for making the switching unit in a state in which communication is not possible to the downstream side in a state in which communication can be performed to the downstream side, the control unit executes the control program.

According to the sixth aspect, the switching means is switched by the operation of the control program, so that the switching means can be switched without the switching determining means.

According to a seventh aspect of the present invention, there is provided a transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line. Switching means for enabling / disabling communication, identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station, A plurality of control means to be executed; a plurality of discrimination indices capable of discriminating each of the plurality of control means; and a discrimination program upon receiving a discrimination program for transmitting the discrimination indices of the executed control means to the transmission device of the master station. A discrimination program distributing means for executing the program by a plurality of control means; and a control program for executing the control program received by the control means indicated by the discrimination index when the control program having the discrimination index is received. A ram allocation means is a transmission device of a slave station provided with the a switching determination unit for switching the state of the switching means on the basis of the state of execution of the control program in the plurality of control means.

In the seventh aspect of the invention, when a plurality of control means are included in one slave station, a plurality of control means in the slave station are determined by the determination program, and each determination result is used by using the determination result. A control program suitable for the control means is executed.

According to an eighth invention, in the transmission devices of the sixth and seventh slave stations, the identification information transmitting means transmits its own identification information to the transmission device of the master station at predetermined intervals. It is.

In the eighth invention, the transmission devices of the sixth and seventh slave stations transmit the identification information spontaneously in the same manner as in the fourth invention.

Therefore, there is no need for the master station to transmit an identification information transmission request to each communicable slave station.

According to a ninth aspect of the present invention, in the transmission device of the slave station according to the third to eighth aspects, when an abnormality of the transmission device of the slave station is detected, the switching means is set to a state where communication is possible to the downstream side. This is a slave station transmission device to which an abnormality processing means is added.

According to the ninth aspect, when an abnormality occurs in the slave station, the communication to the downstream side from the slave station is enabled so that the situation where the communication to the downstream side is impossible can be continued. To prevent

The tenth to fourteenth inventions are directed to the first invention.
Alternatively, the present invention relates to a transmission device of a master station in the transmission system of the second invention.

A tenth aspect of the present invention relates to a transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission line, wherein the transmission device of the master station is in communication with itself. An identification information transmission requesting unit for transmitting an information transmission request, receiving identification information that is a response to the identification information transmission request, and setting the identification information, which has not been held by itself, in the received identification information in a state in which it can communicate with itself. The transmission device of the master station includes a recognition unit that recognizes the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of the slave station.

According to the tenth aspect, the identification information of the communicable slave station is actively acquired by the master station, and communication in which a new slave station is specified based on the acquired identification information becomes possible. .

An eleventh aspect of the present invention relates to a transmission device of a master station connected to a transmission device of a slave station via a bus type transmission line, wherein identification information of the transmission device of the slave station which is in a communicable state with itself is transmitted. Among the received identification information, the identification information that was not held by itself is the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations that can communicate with itself. This is the transmission device of the master station including a recognition unit that recognizes that

In the eleventh aspect, the identification information of the communicable slave station is passively acquired by the master station. That is, the identification information transmitted from the slave station at predetermined intervals is acquired by the master station, and communication in which a new slave station is specified based on the acquired identification information becomes possible.

According to a twelfth invention, in the transmission device of the master station according to the tenth and eleventh inventions, the transmission device of the child station whose identification information is newly recognized by the recognition means is replaced by the transmission device of the child station. This is a transmission device of the master station to which a control program transmitting means for transmitting a control program corresponding to.

According to the twelfth aspect, a specific control program can be transmitted to the new slave station after communication with the other party specified between the master station and the new slave station becomes possible.

A thirteenth aspect of the present invention relates to a transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission line, wherein the transmission device of the master station is in communication with itself. An identification information transmission requesting means for transmitting an information transmission request, and receiving identification information which is a response to the identification information transmission request, and, among the received identification information, identification information which has not been held by itself and which can communicate with itself. A recognition unit that recognizes the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of the slave stations, and a transmission device of the slave station whose identification information is newly recognized by the recognition unit. On the other hand, a discriminating program transmitting means for transmitting a discriminating program for causing the discriminating index of the control means provided in the transmitting device of the slave station to be transmitted to itself, and the transmitting device of the slave station whose identification information is newly recognized by the recognizing means. Against A transmission device of a parent station and a control program transmitting means for transmitting a control program corresponding to the transmission apparatus and received discrimination indication of the child stations.

According to the thirteenth aspect, when a new slave station includes a plurality of control means, the plurality of control means are determined, and a control suitable for each control means is determined based on a result of the determination. A program can be provided.

A fourteenth aspect of the present invention relates to a transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission line, wherein identification information of the transmission device of the slave station which is in a communicable state with itself is transmitted. Among the received identification information, the identification information that was not held by itself is the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations that can communicate with itself. Identification means for recognizing that the identification information is transmitted to the transmission apparatus of the slave station whose identification information is newly recognized by the identification means, and transmitting the identification index of the control means of the transmission apparatus of the slave station to itself. A discriminating program transmitting means for transmitting a program, and a control program for transmitting a control program corresponding to the transmission device of the slave station and the received identification index to the transmission device of the slave station whose identification information is newly recognized by the recognition means. A transmission device of a parent station; and a beam transmitting unit.

In the fourteenth invention, only the point that the master station passively acquires the identification information of the slave station is described in the thirteenth invention.
The invention is different from the invention of the thirteenth embodiment.
It is the same as the invention of the above.

[0056]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) In this embodiment, when a control program is not provided, a bus-type transmission line is set to a state where communication from the master station to the downstream side is impossible. And a master station that obtains the control unit identification code transmission when there is a slave station that cannot communicate with all slave stations and recognizes the control unit identification code of the new slave station and its position A transmission system including the transmission device will be described.

FIG. 1 is a block diagram showing an example of the configuration of the transmission system according to the present embodiment, and the same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals.

The transmission system 9 includes a transmission device 10 of a slave station.
a and 10b and the transmission device 11 of the master station. Here, the transmission system 9 includes two slave stations 10, 10
Although the case where b is connected has been described, the present invention is not limited to this, and any number of slave stations may be connected.

First, the configuration of the slave stations 10a and 10b will be described. Each of the slave stations 10a and 10b introduces the bus-type transmission line 2 led from the master station 11 from the input side (IN) and leads from the output side (OUT). The slave stations 10a and 10b mainly include an I / O unit 5, a transmitting / receiving unit 6,
It comprises a control unit 12, a line switching determination unit 13, and a switching unit 14.

The I / O unit 5 has the control unit 1 as described above.
The external device is controlled by a command from the second device. The external devices controlled by the I / O unit 5 include, for example, a door opening / closing device, a vehicle driving motor, a cooling / heating device, a lighting device, and the like.

The transmission / reception unit 6 transmits and receives communication data between the slave stations 10a and 10b and the master station 11. Specifically, the transmission / reception unit 6 receives a control unit identification code transmission request from the master station 11, communication data addressed to its own transmission device, and a control program addressed to its own transmission device, and receives the received control unit identification code. It transmits communication data to the master station, such as its own control unit identification code, which is a response to the transmission request, and a control result in the slave station.

The control section 12 is a section for executing various programs. The control unit 12 includes a basic program 121
And the received control programs 121 to 12N
Do one of

When a control program is installed, the control unit 12 controls an external device via the I / O unit 5 and executes transmission / reception with the master station 11 via the transmission / reception unit 6. I do.

The basic program 121 has a process of determining whether or not a control program has been introduced into the control unit 12 and outputting a result of the determination to the circuit switching determination unit 13.

When the basic program 121 receives a control unit identification code transmission request from the master station 11,
It has an identification information transmission function of returning the control unit identification code unique to the slave station to the master station 11.

Upon receiving the determination result of the introduction of the control program from the control unit 12, the line switching determination unit 13 operates the state of the switching unit 14 based on the determination result. That is, when the determination result indicating that the installation has been completed is input, the line switching determination unit 13 sets the switching unit 14 to the communicable state, and when the determination result indicating that the installation has not been input is input, the line switching determination unit 13
Causes the switching unit 14 to be in a communication disabled state.

The switching unit 14 is provided downstream of the connection point between the transmission / reception unit 6 and the bus-type transmission line 2 as viewed from the master station 11, and opens and closes the bus-type transmission line 4 by operating the circuit switching determination unit 13. Relay device.

That is, when the control program is not installed in the control unit 12, the switching unit 14 of the slave stations 10a and 10b disconnects the bus-type transmission line 2, and the control program is introduced into the control unit 12. If so, the bus-type transmission path 2 is connected.

Next, the configuration of the master station 11 will be described.
The master station 11 is connected to one end of the bus-type transmission path 2,
It mainly comprises a transmitting / receiving unit 15, a storage unit 16, and a master station control unit 17.

The transmission / reception section 15 comprises the master station 11 and the slave station 10.
a and 10b are transmitted and received. Specifically, the transmission / reception unit 15 transmits a control unit identification code transmission request and communication data addressed to an arbitrary slave station, and, as a response to the transmitted control unit identification code transmission request, the control unit of the slave station in a communicable state. Transmits identification codes and various communication data.

Various data are stored in the storage unit 16. Among them, for example, a slave station table 16a relating to a control unit identification code of each slave station constituting the transmission system, and a slave station table 16a to be introduced into the slave station. Various control programs 122
To 12N.

The master station controller 17 executes various controls such as creation of commands and requests for slave stations and processing based on communication data from slave stations, thereby opening and closing only one door. And controls the drive motor as a whole.

In addition, the master station control unit 17 has an identification information transmission request function 18, a recognition function 19, and a control program transmission function 20.

The identification information transmission request function 18 checks whether or not communication with all the slave stations is possible via the transmission / reception unit 15 when the transmission system is started or when a command to confirm the slave station is input. As a result of the check, when communication with all the slave stations is possible, the normal control operation by the control unit 17 is performed, but when communication with all the slave stations is not possible, a slave station that can communicate via the transmission / reception unit 15 Transmits a control unit identification code transmission request.

Upon receiving the control unit identification code as a response to the transmitted control unit identification code transmission request, the recognizing function 19 compares the received content with the content of the slave station table 16a, and registers the unregistered slave station table 16a. The control unit identification code is registered as the control unit identification code of the new slave station. Also,
Using the received control unit identification code, the connection position of the new slave station is recognized. As the connection position of the new slave station, for example, the slave station on the most downstream side among the slave stations in a communicable state is recognized as the new connection position. Also, for example, it is possible to recognize the number of the slave station connected to the new slave station from the master station from the number of received control unit identification codes.

The operation of registering the control unit identification code of the new slave station and recognizing the connection position by the recognition function 19 is repeated until normal communication with all slave stations is possible.

The control program transmission function 20 includes the recognition unit 1
Then, a control program suitable for the slave station at the connection position recognized by 9 is selected, and the selected control program is transmitted with the control unit identification code of the new slave station attached. This makes it possible to transmit a suitable control program to a new slave station.

Transmission system 9 having the above configuration
The operation of will be described below.

FIG. 2 is a flowchart showing the operation of slave station 10a of transmission system 9 according to the present embodiment.

For example, when newly connecting the slave station 10a, starting up the transmission system, or inputting a confirmation command for the slave station, the switching unit 14 of the unrecognized slave station 10a becomes disconnected (open) (s1).

First, it is determined whether or not a control program is introduced in the control unit 12 of the slave station 10a (s).
2). If it is determined that the control program is installed, the control unit 12 of the slave station outputs the control program to the line switching determining unit 13 and the control program is executed by the control unit 12 (s3). .

On the other hand, if it is determined that the control program has not been introduced, the fact that there is no control program is output from the control unit 12 of the slave station to the line switching judgment unit 13 (s
4).

The line switching determining unit 13 outputs an ON / OFF state instruction to the switching unit 14 based on the control program presence / absence signal from the control unit 12 (s5).

When the presence of the control program is input from the control unit 12 to the line switching judgment unit 13, the switching unit 14 is brought into the connection state (short) by the line switching judgment unit 13 (s6).

On the other hand, if no control program is input from the control unit 12 to the line switching determining unit 13, the switching unit 14 is kept disconnected (open) by the line switching determining unit 13 (s7). The slave station 10a enters a standby state until a control unit identification code transmission request is received by the control unit 12 from the master station 11 via the transmission / reception unit 6 (s8).

When a control unit identification code transmission request is received from the master station 11 to the control unit 12, the control unit 12
Transmits its own control unit identification code to the master station 11 via the transmission / reception unit 6 (s9).

Then, the control program addressed to the self station 1
1 is received by the control unit 12 via the transmission / reception unit 6 (s10), the switching unit 14 is connected by the line switching determination unit 13, and the received control program is transmitted to the control unit 1
2 (s11).

FIG. 3 is a flowchart showing the operation of master station 11 of transmission system 9 according to the present embodiment.

For example, when the slave station 10a is newly connected, when the transmission system is started up, or when the slave station confirmation command is input, the master station 11
It is determined by the identification information transmission request function 18 of the master station controller 17 whether or not communication is possible between the master station 11 and all slave stations constituting the transmission system 9 (t1). If communication is possible between them, a normal control operation as the master station 11 is executed (t2).

On the other hand, if it is not possible to communicate with all the slave stations constituting the transmission system 9, the master station control unit 17 communicates with the communicable slave stations among all the slave stations constituting the transmission system 9.
Until the control unit identification code transmission request is transmitted by the identification information transmission request function 18 (t3), and the control unit identification code is received by the master station control unit 17 via the transmission / reception unit 15 from a communicable slave station as a response. A standby state is set (t4).

At this point, among the communicable slave stations, the number of new slave stations whose master station 11 does not hold an identification code is limited to one.

Therefore, when all of the control unit identification codes from each of the communicable slave stations have been received, the control unit identification codes that have not been registered in the master station among the received control unit identification codes are new child units. It is registered in the storage unit 16 by the recognition function 19 as the control unit identification code of the station (t5).

Further, the connection position of the new slave station is recognized by the recognition function 19 and stored in the storage unit 16 (t
6).

Then, a control program suitable for the position of the new slave station is selected from the storage unit 16 and transmitted to the bus type transmission line 2 by the control program transmission function 20 with the control unit identification code attached (t7). ). As a result, it is possible to load a control program suitable for a new slave station to which no control program has been introduced.

Next, the operation of the transmission system 9 as a whole will be described. In the transmission system 9 as described above, first, the slave station that does not hold the control unit identification code in the master station 11 and is connected to the master station at the most upstream side (hereinafter, “unidentified most station”). The upstream slave station) disables communication to the downstream side of itself.

Then, the control unit identification code of each slave station up to the unidentified most upstream slave station is acquired by the master station 11, and the newly acquired control unit identification code among the acquired control unit identification codes is obtained. It is retained as the identification code of the unidentified most upstream child station. This is because, among the identification codes acquired by the master station 11, there is only one unregistered identification code, so that the unregistered identification code is directly determined as the code of the unregistered most upstream child station. .

Further, the connection position of the unidentified most upstream slave station is recognized by the master station 11.

As described above, by obtaining the identification code of the most unidentified most upstream child station, communication in which the other party is specified can be performed between this unidentified most upstream child station and the master station.

Then, the unidentified most upstream child station is enabled to communicate downstream from itself. As a result, a slave station connected further downstream and having no control unit identification code in the master station 11 becomes a new unidentified most upstream slave station.

In the transmission system 9, the above operation is continued until the identification codes of all the slave stations are obtained.

As described above, according to the present embodiment, of the slave stations connected to the bus-type transmission line 2, a period from the master station 11 to the first slave station whose identification code is not registered is set. The communication which specified the other party becomes possible.

The slave stations 10a and 10b transmit the control unit identification code transmission request from the master station 11 (until the control program is introduced, or transmit their own control unit identification code to the master station 11). And the parent station 11
The transmission line on the downstream side of the own transmission device is cut off.

On the other hand, the master station 11 acquires the control unit identification codes of the slave stations arranged from the master station 11 to the new slave station, and obtains the control unit identification codes of the acquired control unit identification codes which are not registered in advance. Registers the unit identification code as the control unit identification code of the new slave station, further recognizes that the new slave station is connected to the most downstream of the communicable slave stations, and identifies the newly registered control unit identification A control program suitable for a new slave station is transmitted using the code.

As a result, the communication between the master station and the new slave station can be automatically specified without the operator directly operating the new slave station. Can be introduced automatically to stations.

That is, the transmission system 9 of the present embodiment
In the above, by controlling the switching unit 14 provided in the bus-type transmission line 2 on the output side, it is possible to limit the number of slave stations with unknown control unit identification codes viewed from the master station 11 to one station. Become. Therefore, it is possible to obtain the control unit identification code from the master station 11, determine the position of the slave station, and automatically load the control program.

Therefore, even when the slave station is installed in a place where it is difficult for the operator to operate, the operation of the slave station can be easily started, and the labor and time of the worker can be reduced. .

The transmission system 9 according to the present embodiment
Is described, for example, as a case where it is used for railway vehicles, but is not limited thereto, and can be used in various fields such as aircraft and plants.

(Second Embodiment) In the present embodiment, the transmission system 9 described in the first embodiment is used.
A transmission system in which a slave station voluntarily transmits its own control unit identification code to a master station at predetermined intervals will be described.

FIG. 4 is a block diagram showing an example of the configuration of the transmission system according to the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described in detail.

The transmission system 21 includes a transmission device 22 of the slave station and a transmission device 23 of the master station. Here, the case where one slave station 22 is connected to the transmission system 21 is described. However, the present invention is not limited to this, and any number of slave stations may be connected.

The slave station 22 differs only in that a basic program 24 is provided in the control unit 12 instead of the basic program 121 of the slave stations 10a and 10b described in the first embodiment.

The basic program 24 of the slave station 22 has the same functions as the basic program 121 of the slave stations 10a and 10b described in the first embodiment, and also voluntarily generates a unique program of the slave station at predetermined intervals. Has an identification information transmission function 24a for transmitting the control unit identification code to the master station 11.

Here, the identification information transmitting function 24a transmits the control unit identification code every predetermined period, but the present invention is not limited to this. For example, when the control program 12 is not installed in any of the slave stations connected to the bus-type transmission line 2, the identification information transmitting function 24a may voluntarily transmit the control unit identification code. Further, the identification information transmitting function 24a may spontaneously transmit the control unit identification code when a new slave station is connected to the bus type transmission line 2.

The master station 23 has the same configuration as that of the first embodiment except that the identification information transmission request function 18 is deleted from the master station 11. The master station 23 receives the control unit identification code from the slave station 22 connected via the bus-type transmission line 2 at predetermined intervals, and uses the above-described method to set the connection position of the new slave station. And the control unit identification code.

By constructing the transmission system 21 by the slave station 22 and the master station 23 as described above, communication in which the new slave station 22 is specified automatically becomes possible, and a more appropriate control program can be added to the new slave station. The station 22 can be automatically loaded.

Therefore, even when the slave station 22 is installed in a place where it is difficult for the operator to operate, the operation of the slave station 22 can be easily started, and the labor and time of the worker can be reduced. Can be.

(Third Embodiment) In the present embodiment, the transmission system 9 described in the first embodiment is used.
A transmission system in which a control unit that executes a control program in a slave station directly changes the state of a switching unit will be described.

FIG. 5 is a block diagram showing an example of the configuration of the transmission system according to the present embodiment.
4 are denoted by the same reference numerals and description thereof is omitted, and only different portions will be described in detail.

The transmission system 25 includes a transmission device 26 of the master station.
And the transmission device 27 of the slave station. Here, the case where one slave station 27 is connected to the transmission system 25 is described, but the present invention is not limited to this, and any number of slave stations may be connected.

The master station 26 has the same configuration as that of the master station 11 shown in FIG. 1 and holds various control programs. These control programs 282 to 28n are executed when they are executed. Switching process 2 for switching the switching unit 14 to the connection state
9 is included.

The slave station 27 has a configuration in which the line switching judgment unit 13 is deleted from the slave stations 10a and 10b described in the first embodiment, and the other components are the same.

In the transmission system 25, the switching processing 29 of the control program 282 introduced into the control unit 12 is performed.
The only difference is that the switching unit 14 switches the state of the switching unit 14, and the other operations are the same as those of the transmission system 9 described in the first embodiment.

In transmission system 25 according to the present embodiment as described above, line switching determining section 13 is deleted from the components of the slave station, and switching section 14 is switched by switching processing 29 included in control programs 282 to 28n. Switch.

As a result, the same operation as that of the transmission system 9 in the first embodiment is realized, and the same effect can be obtained.

In the present embodiment, the case where the transmission system 9 described in the first embodiment is modified has been described. However, the present invention is not limited to this, and the second embodiment is not limited thereto. The same can be applied to the transmission system 21 described above. Specifically, even if the line switching determination unit 13 of the slave station 22 in the second embodiment is deleted,
3 is a control program 282 to 28 suitable for the slave station 22.
By introducing any one of n, the switching unit 14 can be controlled, and the same effect as described above can be obtained.

(Fourth Embodiment) In this embodiment, the transmission system 9 described in the first embodiment will be described.
In the following, a description will be given of a transmission system including an abnormality processing unit that sets the switching unit 14 of the slave station to a connected state when an abnormality occurs in the slave station.

FIG. 6 is a block diagram showing an example of the configuration of the transmission system according to the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described in detail.

This transmission system 30 comprises the master station 11 shown in FIG. 1 and the transmission devices 31a and 31b of the slave stations. Here, the case where two slave stations 31a and 31b are connected to the transmission system 30 is described. However, the present invention is not limited to this, and any number of slave stations may be connected.

[0130] The slave stations 31a and 31b are the slave stations 10 in FIG.
a, and 10b are provided, except that an abnormality processing unit 32 is additionally provided.

The abnormality processing section 32 detects an abnormality of a slave station provided with itself, and if an abnormality is detected, the switching section 14
Is the connection state.

For example, even if an abnormality occurs in the slave station 31a while the switching unit 14 remains disconnected and the control program 123 is introduced from the master station 11 to the slave station 31a, the switching unit 14 of the slave station 31a is connected. Suppose it did not.

In such a case, a state where communication from the slave station 31a in which the abnormality has occurred to the downstream side as viewed from the master station 11 is impossible is maintained for a long time.

However, in the present embodiment,
The disconnection unit 14 is forcibly brought into the connected state by the abnormality processing unit 32 of the slave station 31a in which the abnormality has occurred.

Therefore, in addition to the same operation and effect as the first embodiment, even if an abnormality occurs, communication to the downstream side can be secured and communication can be maintained.

In this embodiment, the slave stations 10a, 10b of the transmission system 9 described in the first embodiment are described.
Is described, but the present invention is not limited to this. For example, it is difficult to provide the abnormality processing unit 32 for any of the slave station 22 of the transmission system 21 described in the second embodiment and the slave station 26 of the transmission system 25 described in the third embodiment. It is possible and the same effect can be obtained.

(Fifth Embodiment) In this embodiment, a transmission system in the case where a slave station is provided with a plurality of control units will be described.

FIG. 7 is a block diagram showing an example of the configuration of the transmission system according to the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described in detail.

This transmission system 33 is composed of a transmission device 34 of the slave station and a transmission device 35 of the master station.

The slave station 34 includes a transmitting / receiving unit 36 and a control unit 37.
a and 37b and the line switching determination unit 38 are characteristic elements, and the I / O unit 5 and the switching unit 14 are the same elements as described above.

The transmitting / receiving section 36 has the same functions as those of the transmitting / receiving section 6 in FIG.
6a and a control program assignment function 36b.

When receiving the discrimination program 39 addressed to itself, the discrimination program distribution function 36a
The received discriminating program 39 is introduced into all the control units 37a and 37b provided in the computer and executed.

When the control program allocating function 36b receives the control program addressed to itself, the control program allocating function 36b controls the control unit 37 in accordance with the discrimination data attached to the control program.
The received control program is assigned to any one of a and 37b and executed.

The control unit 37a is the same element as the control unit 12 of FIG. 1 described above, except that it receives an input for control unit discrimination from the discrimination index 40a. This discrimination index 4
The data (signal) for determination input from 0a to the control unit 37a is “L”. In the present embodiment, the control unit whose discrimination data is “L” operates as the main system.

Similarly, the control unit 37b also operates
However, the input for control unit determination is received from the determination index 40b. From this discrimination index 40b, the control unit 37
The discrimination data (signal) input to b is “H”. In the present embodiment, it is assumed that the control unit whose discrimination data is “H” operates as a slave.

When the judgment result indicating the introduction of the control program is input from all the control units 37a and 37b of the slave station 34, the line switching judgment unit 38 changes the state of the switching unit 14 to the connection state.

The master station 33 has substantially the same components as the master station 11 described above with reference to FIG. 1, but here, the storage unit 16 is provided with a determination program 39, and the master station control unit 1
7 is provided with a discrimination program transmission function 41 and a control program transmission function 42.

The discriminating program 39 checks the discriminating data input to the control unit which executes the discriminating program, and performs processing for notifying the master station 33 of the result.

The discrimination program transmission function 41 of the master station control unit 17 is provided for the new slave station 3 recognized by the recognition function 19.
The determination program 39 stored in the storage unit 16 is transmitted to 4.

The control program transmission function 42 is suitable for the discrimination data when the discrimination data is received from the new slave station 34 in response to the transmitted discrimination program 39, and is recognized by the recognition function 19. A control program suitable for the new slave station 34 thus selected is selected from the storage unit 16. Then, for the new slave station 34, data for determination is added to the selected control program and transmitted to the new slave station 34.

For example, the control program transmission function 42
Based on the recognition result of the recognition function and the data "L" for determination by the control unit 40a, it is determined that the control program for opening and closing the door, which operates as the main system, is suitable for the new slave station 34. Then, this program is transmitted with the control unit identification code of the new slave station 34 and the data "L" for identification.

Further, the control program transmission function 42 uses the recognition result of the recognition function and the data "H" for discrimination of the control unit 40b to control the opening and closing of the door which operates as a slave to this new slave station 34. Determine that the program is suitable. Then, this program is transmitted with the control unit identification code of the new slave station 34 and the data "H" for determination.

Transmission system 3 having the above configuration
Operation 3 will be described below.

First, in this transmission system 33,
By the same operation as in the first embodiment described above, the most downstream one of the slave stations 34 in a communicable state is recognized as a new slave station 34, and this new slave station 34 is specified. Communication can be performed.

Then, the discrimination program 39 is transmitted from the master station 35 to the new slave station 34, and the discrimination program 39 is transmitted to the new slave station 34 by the discrimination program distribution function 36a. Will be introduced.

By the processing of the discrimination program 39, the discrimination data "L" inputted to the control section 37a from the discrimination index 40a is transmitted from the new slave station 34 to the master station 35,
Further, data “H” for determination input to the control unit 37b from the determination index 40b is transmitted from the new slave station 34 to the master station 35.

The master station 35 is suitable for the new slave station 34 based on the recognition result of the new slave station 34 by the recognition function 19 and the received data "L" for discrimination. An operating control program is selected. Then, the control program is attached with the determination data “L” and the control unit identification code of the new slave station 34 and transmitted.

The master station 35 is suitable for the new slave station 34 based on the result of the recognition of the new slave station 34 by the previous recognition function 19 and the received discrimination data "H". Then, a control program operating as a system is selected. Then, the control program is attached with data "H" for determination and a control unit identification code of the new slave station 34 and transmitted.

Then, in the new slave station 34, the transmission / reception section 36 receives the main control program with the data "L" for determination. Since this program is provided with data "L" for determination, it is executed by the control unit 40a by the operation of the control program allocating function 36b.

In the new slave station 34, a slave control program with data "H" for discrimination is transmitted by the transmitting / receiving section 3.
6 is received. Since this program is provided with data "H" for determination, the program is executed by the control unit 40b by the operation of the control program allocating function 36b.

As described above, in the transmission system 33 according to the present embodiment, after automatically enabling communication specifying a new slave station 34, a plurality of control units provided in the slave station 34 are controlled. Control programs suitable for each of the units 37a and 37b are transmitted.

Therefore, the slave station 34 has a plurality of control units 37a,
Even in the case of having the station 37b, the operation suitable for the new slave station 34 can be easily started, and the labor and time of the operator can be reduced.

In this embodiment, an example has been described in which one control unit 37a in the slave station is used as a main system and the other control unit 37b is used as a subordinate system. However, the present invention is not limited to this. Instead, the present invention can be similarly used when the control units 37a and 37b control different devices.

In the present embodiment, the slave station 34
Is described as an example, but the present invention is not limited to this. 3 for slave station 34
Even when more than one control unit is provided, a control program suitable for each of the plurality of control units can be introduced using the same method.

In this embodiment, the transmission system 9 described in the first embodiment is modified so that a control program suitable for each of a plurality of control units provided in the slave station can be introduced. But not limited to this. That is, the method used in the present embodiment is:
In each of the second to fourth embodiments, the slave station 34
Is applicable when a plurality of control units are provided.

[0166]

As described above, in the present invention,
When a new slave station is provided in the bus-type transmission line of the transmission system, communication from the new slave station to the downstream side as viewed from the master station is disabled. Then, the master station acquires the identification information of the slave stations with which communication is possible, whereby the master station recognizes the identification information of the new slave station, thereby enabling further communication to the downstream side.

As a result, communication in which this new slave station is automatically specified becomes possible, and the connection position of the new slave station can be recognized.

Further, even when the slave station is installed in a place where it is difficult for the operator to operate, the operation of the slave station can be easily started, and the labor and time of the worker can be reduced. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a configuration of a transmission system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a slave station of the transmission system according to the embodiment.

FIG. 3 is a flowchart showing an operation of a master station of the transmission system according to the embodiment.

FIG. 4 is a block diagram showing an example of a configuration of a transmission system according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing an example of a configuration of a transmission system according to a third embodiment of the present invention.

FIG. 6 is a block diagram illustrating an example of a configuration of a transmission system according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram showing an example of a configuration of a transmission system according to a fifth embodiment of the present invention.

FIG. 8 is a block diagram showing an example of a transmission system employing a conventional bus configuration.

FIG. 9 is a block diagram showing an internal configuration of a conventional transmission device of a slave station.

[Explanation of symbols]

1, 11, 23, 25, 33: Transmission device of master station 2: Bus type transmission line 3c to 3e, 3, 10a, 10b, 22, 27, 31
a, 31b, 34: slave station transmission device 4, 9, 21, 25, 30, 33: transmission system 5: I / O unit 6, 15, 36: transmission / reception unit 36a: discrimination program distribution function 36b: control program assignment Function 7, 12, 37a, 37b Control unit 71, 121, 24 Basic program 24a Identification information transmission function 122 to 12n, 282 to 28n Control program 8 Control unit identification code transmission switch 13, 38 Line switching judgment Unit 14 Switching unit 16 Storage unit 16a Slave table 17 Master station control unit 18 Identification information transmission request function 19 Recognition function 20, 42 Control program transmission function 29 Switching process 32 Error processing unit 39 Discrimination program 40a, 40b ... Discrimination index 41 ... Discrimination program transmission function

Claims (14)

[Claims] 1. A transmission system in which a master station and at least one slave station are connected via a bus-type transmission line, wherein the master station is associated with each of the slave stations, and the self is associated with the master station. At least one switching means for enabling / disabling communication to a downstream side from a connection position of the slave station, and identifying a slave station among the at least one slave station which is in a state capable of communicating with a master station. Identification information acquiring means for acquiring information, identification information not held by the parent station among the identification information acquired by the identification information acquiring means, the most downstream side of the slave stations capable of communicating with the parent station; Recognizing means for recognizing the identification information of the slave station connected to the slave station; and the switching means associated with the slave station for which the identification information is recognized by the recognizing means and making communication to the downstream impossible. To the downstream side Transmission system characterized by comprising a switching determination means for switching the signal to state. 2. The transmission system according to claim 1, further comprising control program transmitting means for transmitting a control program corresponding to said slave station. 3. A transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, the communication device being capable of communicating downstream from its own connection position with respect to the transmission device of the master station. Switching means capable of switching to / not possible; identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station; A transmission device for a slave station, comprising: switching determination means for switching, after receiving an information transmission request, the switching means, which has been unable to communicate downstream, to a state in which communication can be performed downstream. 4. A transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission path, the communication device being capable of communicating downstream from its own connection position with respect to the transmission device of the master station. Switching means capable of switching to / not possible; identification information transmitting means for transmitting its own identification information to the transmission device of the master station at predetermined intervals; and after the transmission of the identification information, communication to the downstream side is disabled. A switching device for switching the switching unit to a state in which communication to a downstream side is possible; 5. A transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, the communication device being capable of communicating downstream from its own connection position with respect to the transmission device of the master station. Switching means capable of switching to / not possible; identification information transmitting means for transmitting own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station; A control unit that executes the control program when the control program is received from the transmission device of the master station; and when the control program is not executed by the control unit, the switching unit cannot communicate with the downstream side. And a switch determining means for making the switching means communicable to the downstream side when the control program is being executed. 6. A transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission path, the communication device being capable of communicating downstream from its own connection position with respect to the transmission device of the master station. Switching means capable of switching to / not possible; identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station; A control unit for executing a control program upon receiving a control program including a process of setting the switching unit in a state in which communication cannot be performed to a downstream side in a state in which communication is impossible to the downstream side. Transmission equipment. 7. A transmission device of a slave station connected to a transmission device of a master station via a bus-type transmission line, the communication device being capable of communicating downstream from its own connection position with respect to the transmission device of the master station. Switching means capable of switching to / not possible; identification information transmitting means for transmitting its own identification information to the transmission device of the master station when receiving an identification information transmission request from the transmission device of the master station; A plurality of control means to be executed, a plurality of discrimination indices capable of discriminating each of the plurality of control means, and a discrimination program for transmitting the discrimination index of the executed control means to the transmission device of the master station. A discriminating program distributing means for causing the plurality of control means to execute the discriminating program, and a control program received by the controlling means indicated by the discriminating index when a control program to which the discriminating index is attached is received. A transmission device for a slave station, comprising: a control program allocating means for executing the control program; and a switching determining means for switching a state of the switching means based on an execution state of the control program in the plurality of control means. 8. The transmission device of a slave station according to claim 6, wherein the identification information transmitting means transmits its own identification information to the transmission device of the master station at predetermined intervals. Slave station transmission equipment. 9. The transmission device of a slave station according to claim 3, wherein the switching unit can communicate with a downstream side when an abnormality of the transmission device of the slave station is detected. A transmission device for a slave station, characterized by adding an abnormality processing means for setting a state of the slave station. 10. A transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission path, wherein the transmission request of the identification information is transmitted to the transmission device of the slave station which is in a communicable state with itself. Identification information transmission requesting means for transmitting, and receiving identification information which is a response to the identification information transmission request,
Of the received identification information, the identification information not held by itself is identified by the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations communicable with the self. A transmission device of a master station, comprising: a recognition unit for recognizing that there is a transmission device. 11. A transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission path, the identification information of the transmission device of the slave station being communicable with itself is received. Of the received identification information, the identification information not held by itself is identified by the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations in a communicable state with the self. A transmission device of a master station, comprising a recognition means for recognizing that there is a transmission device. 12. The transmission device of the master station according to claim 10, wherein a transmission device of the slave station whose identification information is newly recognized by the recognizing means corresponds to the transmission device of the slave station. A transmission device of a master station, further comprising control program transmission means for transmitting a control program to be transmitted. 13. A transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission path, wherein the transmission request of the identification information is transmitted to a transmission device of the slave station which is in a communicable state with itself. Identification information transmission requesting means for transmitting, and receiving identification information which is a response to the identification information transmission request,
Among the received identification information, the identification information not held by itself is identified by the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations that are in a communicable state with the self. To the transmitting device of the slave station whose identification information is newly recognized by the recognizing device, and to the transmission device of the slave device, the discrimination index of the control device provided in the transmitting device of the slave station is transmitted to itself. A discriminating program transmitting means for transmitting a discriminating program to be transmitted, and a control program corresponding to the transmitting device of the slave station and the received discrimination index for the transmitting device of the slave station whose identification information is newly recognized by the recognizing means. A transmission device of a master station, comprising: a control program transmitting means for transmitting. 14. Receiving identification information of a transmission device of a master station connected to a transmission device of a slave station via a bus-type transmission path, the identification information of the transmission device of the slave station being communicable with itself. Of the received identification information, the identification information not held by itself is identified by the identification information of the transmission device of the slave station connected to the most downstream side among the transmission devices of slave stations in a communicable state with the self. A recognition unit for recognizing that there is a communication device, and transmitting a discrimination index of a control unit included in the transmission device of the slave station to the transmission device of the slave station whose identification information is newly recognized by the recognition unit. A discriminating program transmitting unit for transmitting a discriminating program, and transmitting a control program corresponding to the transmitting device of the slave station and the received identification index to the transmitting device of the slave station whose identification information is newly recognized by the recognizing unit. System A transmission device of a master station, comprising a control program transmission means.