CN116055534A - A data forwarding system and method for multi-serial devices - Google Patents

Abstract

The present invention proposes a multi-serial device data forwarding system and method, which relate to the field of industrial automation communication. The system includes a plurality of control devices, a serial port server, a plurality of controlled devices and a host computer; The server communication connection is used to send data to the serial port server; the plurality of controlled devices are connected to the serial port server for communication, and are used to receive the data forwarded by the serial port server; data; the serial port server is respectively connected with a plurality of control devices, a plurality of controlled devices and the host computer for receiving and sending data; the serial port server includes a serial port data forwarding unit and a network port; the serial port data forwarding The unit communicates with the network port for analyzing and forwarding the data signaling; the network port communicates with the serial port data forwarding unit and the host computer for forwarding the data to the host computer.

Description

A data forwarding system and method for multi-serial port devices

technical field

The invention relates to the field of industrial automation communication, in particular to a multi-serial device data forwarding system and method.

Background technique

At present, there are still many industrial automation applications that use RS485/422/232, CAN and other industrial buses to realize industrial automation data acquisition and control; based on the needs of industry 4.0 data acquisition and control, industrial sites complete industrial bus through serial server/CAN server Docking with Ethernet; the serial device on the industrial site generally sends the communication data to the serial server through the serial port, and the serial server converts the received communication data into IP data packets and sends them to the remote server; the remote server sends the received IP data packets Restore to serial port data, and then transmit the serial port data to other network elements, which is equivalent to lengthening the serial port cable, so as to achieve longer distance transmission.

In actual demand, people hope that the data from different serial ports can be forwarded to multiple different other serial ports, and the current serial port data forwarding method is either through the virtual serial port software located on the third-party device for relay, or on the serial port server. Set a forwarding service module, and the above two methods have a common disadvantage. Once the forwarding is set, all data from a serial port will be forwarded to another serial port, and cannot be distributed to several other serial ports at the same time.

Chinese patent CN102546840A "Method, device and system for binding virtual serial port and physical serial port" discloses a method, device and system for binding virtual serial port and physical serial port to reduce the management complexity of virtual serial port, This method is to bind the physical serial port through the virtual serial port on the third-party device to realize data forwarding between serial ports. However, this binding can only forward the data from one serial port to the same other serial port at the same time. If it is forwarded to another serial port, it needs to be forwarded again.

Contents of the invention

In view of this, the present invention proposes a multi-serial port device data forwarding system and method, which are used to simultaneously forward the data of one serial port to multiple different other serial ports.

The technical solution of the present invention is realized as follows: On the one hand, the present invention provides a multi-serial port device data forwarding system, the system includes multiple control devices, serial port servers, multiple controlled devices and a host computer;

The plurality of control devices are communicatively connected to the serial port server for sending data to the serial port server;

The multiple controlled devices are communicatively connected to the serial port server for receiving data forwarded by the serial port server;

The host computer communicates with the serial port server for receiving data forwarded by the serial port server;

The serial port server is respectively connected to multiple control devices, multiple controlled devices and host computer for receiving and sending data;

The serial port server includes a serial port data forwarding unit and a network port;

The serial port data forwarding unit is communicatively connected to the network port, and is used for signaling analysis and forwarding of data;

The network port is communicatively connected with the serial port data forwarding unit and the host computer for forwarding data to the host computer.

Preferably, the multiple control devices include special devices and common devices, and the data of the special devices needs to be analyzed and forwarded by signaling; the data of the common devices does not need to be analyzed by signaling, and is directly transparently transmitted.

Preferably, the special device generates a special message to the serial port, and the serial port includes RS485, RS422 and RS232.

Preferably, the content of the special message includes whether to forward to other serial ports, whether to forward to the network, whether to forward to serial port 1, ..., whether to forward to serial port n-1, whether to forward to serial port n and actual user data, n It is the serial port number of the serial server.

On the other hand, the present invention also provides a multi-serial device data forwarding method, comprising the following steps:

S1, determine whether the control device corresponding to the serial port needs to forward data, if so, configure the state of whether the serial port data needs to be forwarded to other serial ports on the serial port server as enable; otherwise, configure its state as disable;

S2, when the control device corresponding to the serial port does not need to forward data, directly transparently transmit the data; when the control device corresponding to the serial port needs to forward data, control the control device to form a special message;

S3, according to the content of the special message, the serial port data forwarding unit performs signaling analysis on it, and forwards the serial port data of the control device according to the analysis result.

Preferably, step S1 specifically includes:

When configuring whether the serial port data needs to be forwarded to other serial ports on the serial port server is enabled, the serial port data must contain at least a 4-bit header, including whether to forward to other serial ports and whether to forward to the network.

Preferably, step S2 specifically includes:

When the corresponding control device of the serial port does not need to forward data, the data of the serial port does not need a data packet header, and is directly transparently transmitted, and the actual user data is sent.

Preferably, step S2 also includes:

The special message includes a plurality of bytes, and each bit in the byte defines whether to forward to other serial ports, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n -1. Whether to forward to serial port n and actual user data,

Preferably, step S3 specifically includes:

The serial port data forwarding unit performs signaling analysis on the serial port data. If the first bit in the first byte is 0, it means not forwarded to other serial ports, and if it is 1, it means forwarded to other serial ports. Determine whether to forward it to other Serial port, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n-1, whether to forward to serial port n, and finally carry the actual user data.

Preferably, step S3 also includes:

When the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag and whether to forward to serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag and whether to forward to serial port n It must exist, and the length of the subsequent forwarding flag tells the maximum serial port number involved in the special message. If the bit of whether to forward to serial port n is 1, it corresponds to the need to forward, otherwise it will not be forwarded.

Compared with the prior art, a multi-serial device data forwarding system and method of the present invention has the following beneficial effects:

(1) Form a special message through the control device, and perform signaling analysis on it through the serial port data forwarding unit on the serial port server, so that the serial port data from the same control device can be distributed to different serial ports to meet specific needs;

(2) By distinguishing between control devices that need to forward data and control devices that do not need to forward data, while maintaining the general basic functions, that is, the normal transmission of serial data, it can also meet the special needs of special devices for specific scenarios, Forward the serial port data sent by it to multiple different serial ports;

(3) Combine information such as whether to forward to other serial ports, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port n, etc., and the actual user data to form a special message, without damaging the original serial port data. Add an "identification code" to it to distinguish it from other data, so that the serial port data can be forwarded to the designated serial port.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a kind of multi-serial port device data forwarding system structural diagram of the present invention;

Fig. 2 is a kind of multi-serial port device data forwarding method flowchart of the present invention;

FIG. 3 is a signaling format diagram of a data forwarding method for multiple serial port devices according to the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Embodiment one

A multi-serial device data forwarding system is provided, as shown in Figure 1, the system includes a plurality of control devices, a serial port server, a plurality of controlled devices and a host computer;

Multiple control devices communicate with the serial port server for sending data to the serial port server;

Multiple controlled devices communicate with the serial port server to receive the data forwarded by the serial port server;

The upper computer communicates with the serial port server to receive the data forwarded by the serial port server;

The serial port server is respectively connected with multiple control devices, multiple controlled devices and the host computer for receiving and sending data;

The serial port server includes a serial port data forwarding unit and a network port;

The serial port data forwarding unit communicates with the network port, and is used for signaling analysis and forwarding of data;

The network port communicates with the serial port data forwarding unit and the host computer for forwarding data to the host computer.

There needs to be a "serial port data forwarding unit" inside the serial port server; it is responsible for analyzing the signaling of the data from a specific port according to the configuration, and forwarding the data according to the signaling.

The multiple control devices include special devices and common devices, and the data of the special devices needs to be analyzed and forwarded by signaling; the data of the common devices does not need to be analyzed by signaling, and is directly transparently transmitted.

Control display and other special devices to generate and send special messages to the serial port as needed, the serial port can be RS485, RS422 or RS232;

Except for the serial port data of special equipment that needs to be analyzed by signaling, the data of other serial ports does not need to be parsed and can be directly transparently transmitted.

The special device generates a special message to the serial port, and the serial port includes RS485, RS422 and RS232.

The content of the special message includes whether to forward to other serial ports, whether to forward to the network, whether to forward to serial port 1, ..., whether to forward to serial port n-1, whether to forward to serial port n and actual user data, n is the serial port server Number of serial ports.

Which serial port data needs to be parsed, by setting "whether the data of this serial port needs to be forwarded to other serial ports" on the web page.

Embodiment two

A data forwarding method for multi-serial devices is provided, as shown in Figure 2, comprising the following steps:

S1, determine whether the control device corresponding to the serial port needs to forward data, if so, configure the state of whether the serial port data needs to be forwarded to other serial ports on the serial port server as enable; otherwise, configure its state as disable;

S2, when the control device corresponding to the serial port does not need to forward data, directly transparently transmit the data; when the control device corresponding to the serial port needs to forward data, control the control device to form a special message;

S3, according to the content of the special message, the serial port data forwarding unit performs signaling analysis on it, and forwards the serial port data of the control device according to the analysis result.

The user sets "data from serial port 1 needs to be forwarded to other serial ports" on the serial port server configuration interface, and the serial port data forwarding unit saves the configuration.

When the user presses a button on the "control display screen 01", the background program of the control screen can decide whether to forward the command to other serial ports according to the configuration to form a special message. The serial port can be RS485, RS422 and RS232 etc.

Step S1 specifically includes:

When configuring whether the serial port data needs to be forwarded to other serial ports on the serial port server is enabled, the serial port data must contain at least a 4-bit header, including whether to forward to other serial ports and whether to forward to the network.

Step S2 specifically includes:

When the corresponding control device of the serial port does not need to forward data, the data of the serial port does not need a data packet header, and is directly transparently transmitted, and the actual user data is sent.

The special message includes a plurality of bytes, and each bit in the byte defines whether to forward to other serial ports, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n -1. Whether to forward to serial port n and actual user data,

Step S3 specifically includes:

The serial port data forwarding unit performs signaling analysis on the serial port data. If the first bit in the first byte is 0, it means not forwarded to other serial ports, and if it is 1, it means forwarded to other serial ports. Determine whether to forward it to other Serial port, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n-1, whether to forward to serial port n, and finally carry the actual user data.

If the data needs to be forwarded to other serial ports, set "whether to forward to other serial ports" in the signaling to 1, otherwise set to 0;

If the data needs to be forwarded to the device on the network, the "whether to forward to the network" in the signaling is set to 1, otherwise it is set to 0;

When the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag and whether to forward to serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag and whether to forward to serial port n It must exist, and the length of the subsequent forwarding flag tells the maximum serial port number involved in the special message. If the bit of whether to forward to serial port n is 1, it corresponds to the need to forward, otherwise it will not be forwarded.

When a device does not need to forward data, configure "whether the data of this serial port needs to be forwarded to other serial ports" on the configuration page of the serial port server as disable. At this time, the data packet header is not needed, and what the serial port sends out is "actual user data".

Combined with Figure 1 and Figure 2, the "Control Display 01" program sends serial data to serial port 1 of the serial server;

The "serial port data forwarding unit" of the serial port server judges whether the user has set "whether the data of this serial port needs to be forwarded to other serial ports" as enable (default is disable);

If it is enable, then parse the data according to the "signaling format" (as shown in Figure 3);

Analyze whether it needs to be forwarded to the network; and control whether the data is forwarded to the network according to the flag bit; if necessary, forward it to one or more corresponding network devices according to the configured rules.

Analyze whether it needs to be transferred to the serial port; if necessary, analyze the serial port bit in the signaling, and send it to the corresponding serial port according to the bit instruction. Data is not sent to other serial ports if not required.

The signaling format is shown in Figure 3, taking the server with 8 serial ports as an example:

When a device does not need to forward data, configure "whether the data of this serial port needs to be forwarded to other serial ports" on the configuration page of the serial port server as disable. At this time, the data packet header is not needed, and the serial port sends out "actual user data";

When configuring "whether the data of this serial port needs to be forwarded to other serial ports" on the configuration page of the serial port server as enable, the serial data sent by the device corresponding to the serial port must contain at least a 4-bit header, including "whether to forward to other serial ports" and "Forward to network" information.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A multi-serial device data forwarding system, said system comprising a plurality of control devices, a serial port server, a plurality of controlled devices and a host computer; The plurality of control devices are communicatively connected to the serial port server for sending data to the serial port server; The multiple controlled devices are communicatively connected to the serial port server for receiving data forwarded by the serial port server; The host computer communicates with the serial port server for receiving data forwarded by the serial port server; The serial port server is respectively connected to multiple control devices, multiple controlled devices and host computer for receiving and sending data; The serial port server includes a serial port data forwarding unit and a network port; The serial port data forwarding unit is communicatively connected to the network port, and is used for signaling analysis and forwarding of data; The network port is communicatively connected with the serial port data forwarding unit and the host computer for forwarding data to the host computer. 2. A kind of multi-serial device data forwarding system as claimed in claim 1, is characterized in that, described multiple control equipments comprise special equipment and common equipment, and the data of special equipment needs signaling analysis and forwarding; The data of common equipment It does not require signaling analysis and can be directly transparently transmitted. 3. A multi-serial device data forwarding system as claimed in claim 2, wherein said special device generates a special message to the serial port, and the serial port includes RS485, RS422 and RS232. 4. A kind of multi-serial port device data forwarding system as claimed in claim 3, is characterized in that, the content of described special message comprises whether to forward to other serial ports, whether to forward to network, whether to forward to serial port 1, ..., whether Forward to serial port n-1, whether to forward to serial port n and actual user data, n is the serial port number of the serial port server. 5. a multi-serial device data forwarding method, is characterized in that, comprises the following steps: S1, determine whether the control device corresponding to the serial port needs to forward data, if so, configure the state of whether the serial port data needs to be forwarded to other serial ports on the serial port server as enable; otherwise, configure its state as disable; S2, when the control device corresponding to the serial port does not need to forward data, directly transparently transmit the data; when the control device corresponding to the serial port needs to forward data, control the control device to form a special message; S3, according to the content of the special message, the serial port data forwarding unit performs signaling analysis on it, and forwards the serial port data of the control device according to the analysis result. 6. A kind of multi-serial device data forwarding method as claimed in claim 5, is characterized in that, described step S1 specifically comprises: When configuring whether the serial port data needs to be forwarded to other serial ports on the serial port server is enabled, the serial port data must contain at least a 4-bit header, including whether to forward to other serial ports and whether to forward to the network. 7. A kind of multi-serial device data forwarding method as claimed in claim 6, is characterized in that, described step S2 specifically comprises: When the corresponding control device of the serial port does not need to forward data, the data of the serial port does not need a data packet header, and is directly transparently transmitted, and the actual user data is sent. 8. A kind of multi-serial device data forwarding method as claimed in claim 7, is characterized in that, described step S2 also comprises: The special message includes a plurality of bytes, and each bit in the byte defines whether to forward to other serial ports, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n -1. Whether to forward to serial port n and actual user data. 9. A kind of multi-serial device data forwarding method as claimed in claim 8, is characterized in that, described step S3 specifically comprises: The serial port data forwarding unit performs signaling analysis on the serial port data. If the first bit in the first byte is 0, it means not forwarded to other serial ports, and if it is 1, it means forwarded to other serial ports. Determine whether to forward it to other Serial port, whether to forward to the network, the length of the subsequent forwarding flag, whether to forward to serial port 1, ..., whether to forward to serial port n-1, whether to forward to serial port n, and finally carry the actual user data. 10. A kind of multi-serial device data forwarding method as claimed in claim 9, is characterized in that, described step S3 also comprises: When the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag and whether to forward to serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag and whether to forward to serial port n It must exist, and the length of the subsequent forwarding flag tells the maximum serial port number involved in the special message. If the bit of whether to forward to serial port n is 1, it corresponds to the need to forward, otherwise it will not be forwarded.

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