JPH04149703A - Process controller - Google Patents

Abstract

PURPOSE:To shorten a test time, to prevent the controller from getting mechanical fatigue, and to improve working efficiency by providing a nonvolatile memory, a means which writes a control program from a transmitting means in the nonvolatile memory under constant conditions, and a means which starts the control program in the nonvolatile memory in a main machine. CONSTITUTION:This process controller is equipped with the transmitting means 3 which couples a center device 1 and the main machine 2 and then the writable nonvolatile memory 7, the means 10 which writes the control program from the transmitting means 3 in the nonvolatile memory 7 when no reception is performed or at the end of a process after reception, and the means 8 which actuates the control program stored in the nonvolatile memory 7 are provided in the main machine 2. Consequently, the control program in a PROM, etc., can be modified as program information is sent from the center device without the replacement of the PROM, etc., and the process controller which enables the alteration of the control program in a state of good working efficiency and excellent working environment is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a process control device using an embedded microcomputer.

(Prior Art) In process control, control program information is usually
It is stored in the PROM of the control device, and the control operation is
A control program is read from this FROM and executed.

Here, when changing the control program, it is especially important if a large software system can be constructed using a large capacity memory, and it is especially important to change the control program if a large software system can be constructed using a large capacity memory. ji
etc., Her i (F) F ROM
will need to be replaced.

(Problem to be solved by the invention) Change of control program at test stage of development 1:
Replacement of the required PROM involves modifying the program, creating a FROM based on the modification, converting the PROM, and testing for confirmation.

However, in this procedure, the creation of FROM and the replacement of PROM are troublesome and require a lot of time, resulting in a problem of very low work efficiency. In particular, when replacing the above-mentioned FROM, normally the board or FR
OMIC insertion/removal J, KA row f5 ￥, but there are many cases where this causes mechanical fatigue or damage to the wear. 1,1'C1 The above-mentioned "I'l work efficiency W" will further increase if the working environment is poor or if there are multiple machines.

In view of the above-mentioned problems, the invention of the C1 tree is to change the control program without replacing the FROM, and to maintain the control program with good work efficiency and a good working environment. The purpose is to provide process control equipment that can be changed.

r Structure of the Invention] (Lower part of the solution to the problem) 1. The present invention that achieves the above-mentioned object has a transmission means for connecting the central device and the main unit to @λ, -, and a writing system in the main unit. 1. A non-volatile memory capable of controlling the data and a control processor from the transmission means.1. At the end of processing when wo has not been received or when it has been received -1. 1. The information is also written to volatile memory, and the non-volatile memory is stored in the memory. The gist is also provided with means for activating the control blog.

(Function) A transmission means connects the central device and the machine, and the machine contains a volatile memory, a means for storing the control program from the transmission means under certain conditions into a qualitative memory, and a non-volatile memory. By providing a means for activating the control program in the non-volatile memory, the control program in the non-volatile memory can be activated without replacing the FROM.
, it is possible to change the function of the control device while improving the working environment and work efficiency.

(Example) The present invention will now be described in detail with reference to FIGS. 1 to 5. In FIG. 1, a device W (hereinafter referred to as a change device) for transmitting a control program to the main unit 2 is provided on the central device side.

This changing device 1 is connected to the main unit 2 by a serial transmission line '3 (:), and is connected to a serial port 5 within the main unit 2.

The inside of this machine 2 is equipped with a micropro sensor 74,
OM 04.1- and EEPROM 7 and its writing device (controlled and controlled by 7BIJIRIROROSEJ'+4.-(') 'l tl, P RON 6
Hakukomi +1 ■ Noh R (,) N7 A - 7 Ko, Pro 7 Ram Rogue 8 or + II le. bu[7g→mu[7-
'-r゛8 is 1. +1 Albo-1.5 color [T″ll
Reception day S7 (control day D '7' 71 people) E E
P ROM 7 n t, L f = r no, f
a h-′-1, ant, Ts #, j3k A
[L'j control-f port'・'→mu receiving port is activated. In addition, buj-7ge;)mu[1-u'8 confirms that the control button program is 0/no. In the case of control, f
n! 7 Ram is missing and 1- and the reception flag is knocked down.

EEPRON1i stores the control program.
Stored - D11A0
OM, and is controlled by the writing device 11-). In addition, in Figure 1, 11 is the data bus (,
I'm here.

FIG. 2 shows an operation 70 based on the configuration according to FIG.
It is something. In Figure 2, when the device is started up,
Looking at flag 12, if the reception flag is down, it is control progera I, or if it is not, program information '8 is control action I' [
Wait for control-1[7riu) to be received.

Accordingly, when the control program 4 is received, a writing command is issued to the EEPROM 7i via the controller \table.

The control program is stored in the storage area 9 on the EEPROMV, and the control program white is stored in the receiver C.
The process is controlled by the control program stored in the EEPROM 7 while the ``''F flag 12 is set (controllable as rj'1) and received (, i' rough 12 or a-).

If a new control block is received during a control operation, the E E F ROM 7 during this control operation is
t) 7j', the current 4n control progera 1. After spinning is completed, a new control program will be written.
- program is activated and the control progera 1 issues a final γ command (referred to as a control end r command) or has a notification of the completion of the final γ operation of the control program (referred to as a control operation end notification).

The control program side monitors the issuance of the control termination command, and upon detecting this control termination command, performs a predetermined termination operation, and then notifies the program loader 8 of a control operation termination notification, thereby changing the operation of the program loader 8. Transition.

After confirming the control operation completion notification, the program loader 8 loads the received new control program into the EEPRO.
M7 is written, the reception flag 12 is set, and control operations are performed using the new control program.

The entire process control system including the machine 2 having the configuration and operation described above will be described below. The change device 1 in the central device is provided with control programs for each machine 2 as necessary, and any control program is sent to any machine 2.

Prior to transmission, an address (identification code) that identifies each device is first assigned to each device.

Furthermore, a global address is also determined between the central unit and each machine to allow all machines to receive the control program, regardless of the address of each machine.

When the central device transmits the control program to a predetermined machine, it adds the address of the machine to the control program and sends it. Also, when sending the same control program to all machines, add a global address to the control program and send it.

When each machine receives a control program, it checks the address of the received control program to see if it matches its own address, and if it matches, it moves on to the procedure of storing this control program in EEPROM. In this case, the control program is discarded without writing to the EEPROM.

In the case of a global address, the procedure moves to storing the control program in the EEPROM of all the machines.

In this way, the control program is transmitted to each machine, and each machine performs processing according to the operation flow described above. The operation flow will be explained in more detail below with reference to FIGS. 3 and 4.

"When the control program is not loaded" In the initial state, the reception flag is set to OFF. When the power of this machine is turned on, the program loader's "power ONJ" is activated and the reception flag is checked, as shown in Figure 3(a).In the initial state, the reception flag is down, so the determination by block 3A is not performed. The control program is not executed, no process control is performed, and the system waits for the control program to be received.

When the machine receives the control program, "control program reception" of the program loader shown in FIG. 3(b) is activated, and a control termination command shown in block 3B is issued. However, in this case, the control program is not running, so only the formal version is issued. Accordingly, in block 3C, no control operation is performed and the control operation ends.
The control program received after moving to block 3D is EEP.
is written to the ROM and sets the reception flag (block 3E).
), transition to the operation of the control program.

"When the control program has already been loaded" When the power of this machine is turned on as shown in FIG. It is in the control program's receipt section, and since the reception flag is set, the process moves to the control program's operation.

When this machine receives the control program, Fig. 13(b)-
``Control program reception'' of the program loader is activated as shown in FIG. 3B, a control termination command is issued (block 3B), and a control operation termination notification is waited for (block 3C). The control program performs control operations while monitoring the issuance of a control termination command. Then, when a control termination command is detected, a predetermined termination operation is performed, and after the termination operation is completed, a control operation termination notification is issued.After the control operation termination notification is notified, as shown in FIG. 3(b).
After confirming this notification (block 3C), the control program is then written into the EEPROM, a reception flag is set (block 3E), and the process proceeds to the operation of the control program.

In the operation of the control program shown in FIGS. 3(a) and 3(b), the control program flow shown in FIG. 4 is executed. In this control program flow, program 4A determines whether the control end command from the progera l or the loader has been received (7, if a new control block is received, control end processing by the current control program Pl ! (block 3B), and a control operation end notification is issued (block 4C).The determination processing of blocks 4A to 4C is related to blocks 3B and 3C in FIG. 3(b).

In a state where a control end command is not issued in judgment block 4A, the control operation by the control program (block 4D)
Then, process control is performed.

FIG. 5 shows an example in which the entire system can perform two types of operations, rAJ operation and rBJ operation, by switching 5W14 of central unit 1'3.

The central device 13 includes a control program 15 that causes the machine 2 to perform an rAJ operation, and a control program 16 that causes the machine 2 to perform an rBJ operation.
Prepare. So [7. Then, the rAJ operation "B" operation switching 5WI4 is installed in the central unit 13. and,
When the central unit 13 turns the switch SWI 4 to the A side, it adds a glow address to the control program 15 and J and sends it to the Tanimoto machine 2, and when it turns the switch SWI 4 to the B side, it adds a global address to the control program 16. and send it to each machine 2 at f5.

In the above description, the EEPROM has been described, but the write capability, r:, W, which is functionally equivalent.

The memory backup function 4 may be replaced with RAM.

Furthermore, as a transmission means, not only serial transmission but also parallel transmission is possible.

By replacing the control program, this machine can be given various functions; for example, by loading a maintenance control program during maintenance and inspection, it can support maintenance and inspection work.

Storing a program in a non-volatile memory means that there is no risk of data loss even if the power is cut off, and once a control program is loaded, the current program is retained until a new one is loaded.

In process control systems, central equipment - h
The time required to change the control program for this machine can be drastically reduced by changing the control program for this machine uniformly or independently.

Central unit 2 +: If you prepare multiple control programs 1-2, you can change the control progera 14 of the Tanimoto machine by manual operation.1. You can make the stem perform various movements in response to the pizza.

[Efficacy of invention]

4. Explanation [5] According to this investigation, the central unit and this machine are connected by a transmission means, and there is a volatile memory inside the machine, and the control program from the transmission stage 1 is transferred under certain conditions to the central unit and this machine.
By ensuring one stage for writing to volatile memory and a means for starting the control program of non-volatile memory,
It is no longer necessary to replace PRO~1 when starting or changing the control program, shortening test time and preventing mechanical strain, improving work efficiency, and making it possible to operate even if the work environment at the installation location is poor. The changing device can be installed in a location with a favorable environment, allowing for efficient work.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is an operation 70-chart of the device shown in Fig. 1, Fig. 13 (a) and (b) are 70-charts of the program loader, and Fig. 4 is The flowchart of the control program I, FIG. 5 is a block diagram of an example. In the figure, 1 F update device, 2 main unit, 3 serial transmission line, 6 F ROM, 7 EEP R, OLX, 8 program loader, 9 storage area, 12 reception flag, 13... Central unit, 14.15 Control program, 3A to 3E, 4A to 4D/Functional blocks.

Claims (1)

[Claims] A control device that performs process control using this machine having a built-in microcomputer is equipped with a transmission means that connects the central unit and the machine, and the machine includes a writable non-volatile memory and the transmission means. A process control device comprising means for writing a control program from a computer into the non-volatile memory when not received or at the end of processing when already received, and a means for activating the control program stored in the non-volatile memory. .