CN212305381U - Equipment communication protocol converter - Google Patents
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Abstract
The embodiment of the application discloses a device communication protocol converter. The method comprises the following steps: the serial port expansion module is connected with the main control module, comprises a field device interface and at least two upper computer interfaces, is used for being connected with the field device through the field device interface so as to obtain the original data of the field device, and sends the original data to the main control module; the main control module is used for sending the original data to the protocol conversion module; the protocol conversion module is used for analyzing the original data by adopting a target protocol corresponding to the field equipment, packaging the original data to obtain standard Modbus protocol data, and returning the standard Modbus protocol data to the main control module; and the main control module sends the standard Modbus protocol data to the at least two upper computers through at least two upper computer interfaces. By adopting the technical scheme provided by the application, mutual conversion among various different protocols can be realized, so that the compatibility of the protocol converter can be improved, and the problem of high cost of the protocol converter caused by the need of independent development is avoided.
Description
Technical Field
The embodiment of the application relates to the technical field of communication protocol conversion, in particular to an equipment communication protocol converter.
Background
With the rapid development of technology, the communication mode between different devices is an essential bridge for data transmission. The Modbus protocol is a general protocol standard widely used in electronic controllers, and through the protocol, the controllers can communicate with each other and with other devices, and the Modbus protocol is a specified protocol of industrial automation network specification and has become an industrial standard.
With the development of modern industry, more and more devices are continuously coming in, and the communication between an upper computer and the devices becomes more and more frequent and important. However, different communication protocols are respectively adopted due to different equipment manufacturers, different production time, different application scenes and the like, so that the communication between the upper computer and the equipment becomes extremely complicated. The existing protocol converter can only communicate with a specified device, and has the advantages of single function, poor flexibility and high customization and development cost.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an equipment communication protocol converter, which can realize mutual conversion among a plurality of different protocols by one protocol converter, thereby improving the compatibility of the protocol converter and avoiding the problem of high cost of the protocol converter caused by the need of independent development.
In a first aspect, an embodiment of the present application provides an apparatus communication protocol converter, where the protocol converter includes: the system comprises a main control module, a protocol conversion module and a serial port expansion module; wherein:
the serial port expansion module is connected with the main control module, comprises a field device interface and at least two upper computer interfaces, is used for being connected with the field device through the field device interface so as to obtain the original data of the field device, and sends the original data to the main control module;
the main control module is connected with the protocol conversion module and used for sending the original data to the protocol conversion module;
the protocol conversion module is used for analyzing the original data by adopting a target protocol corresponding to the field device, packaging the original data to obtain standard Modbus protocol data, and returning the standard Modbus protocol data to the main control module;
the main control module is also used for sending the standard Modbus protocol data to at least two upper computers through at least two upper computer interfaces of the serial port extension module.
Further, the method also comprises the step of configuring a serial port;
the configuration serial port is connected with configuration equipment and used for obtaining a target protocol selection instruction through the configuration equipment so as to determine a target protocol corresponding to the field equipment.
Further, the device also comprises a storage module;
the storage module is connected with the main control module and used for storing candidate device protocols and storing original data of field devices.
Further, the protocol conversion module is specifically configured to:
determining a protocol type of the original data;
and if the original data adopt a non-standard Modbus protocol, analyzing the original data by adopting a target protocol corresponding to the field equipment.
Further, the protocol conversion module is further configured to:
and if the original data adopt a standard Modbus protocol, analyzing the original data by adopting the standard Modbus protocol.
Further, the main control module is further configured to:
acquiring an anti-control instruction of any one upper computer through at least two upper computer interfaces of the serial port expansion module, and sending the anti-control instruction to the protocol conversion module;
the protocol conversion module is also used for analyzing the inverse control instruction by adopting a standard Modbus protocol, packaging by adopting a target protocol corresponding to the field device and sending the target protocol to the field device through a field device interface of the serial port extension module.
Further, the main control module is further configured to:
receiving an inverse control result of the field equipment through a field equipment interface of a serial port expansion module;
the protocol conversion module is also used for analyzing the anti-control result by adopting a target protocol corresponding to the field device, packaging the anti-control result by adopting a standard Modbus protocol, and sending the anti-control result to the upper computer through at least two upper computer interfaces of the serial port extension module.
In the technical solution provided in the embodiment of the present application, the protocol converter includes: the system comprises a main control module, a protocol conversion module and a serial port expansion module; wherein: the serial port expansion module is connected with the main control module, comprises a field device interface and at least two upper computer interfaces, is used for being connected with the field device through the field device interface so as to obtain the original data of the field device, and sends the original data to the main control module; the main control module is connected with the protocol conversion module and used for sending the original data to the protocol conversion module; the protocol conversion module is used for analyzing the original data by adopting a target protocol corresponding to the field device, packaging the original data to obtain standard Modbus protocol data, and returning the standard Modbus protocol data to the main control module; the main control module is also used for sending the standard Modbus protocol data to at least two upper computers through at least two upper computer interfaces of the serial port extension module. The technical scheme provided by the application can realize mutual conversion among a plurality of different protocols, thereby improving the compatibility of the protocol converter and avoiding the problem of high cost of the protocol converter caused by the need of independent development.
Drawings
Fig. 1 is a schematic diagram of a device communication protocol converter according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a communication protocol converter of a second embodiment of the present application;
FIG. 3 is a schematic diagram of a usage scenario provided in a preferred embodiment of the present application;
fig. 4 is a schematic diagram of the use provided by the preferred embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a schematic diagram of a device communication protocol converter according to an embodiment of the present invention, where the embodiment is suitable for a case of protocol conversion, and the protocol converter may be implemented by software and/or hardware.
As shown in fig. 1, the protocol converter includes: a main control module 110, a protocol conversion module 120 and a serial port extension module 130; wherein:
the serial port expansion module 130 is connected to the main control module 110, and includes a field device interface 131 and at least two upper computer interfaces 132, and is configured to connect to the field device 200 through the field device interface 131 to obtain original data of the field device 200, and send the original data to the main control module 110;
the main control module 110 is connected to the protocol conversion module 120, and configured to send the original data to the protocol conversion module 120;
the protocol conversion module 120 analyzes the original data by using a target protocol corresponding to the field device 200, encapsulates the original data to obtain standard Modbus protocol data, and returns the standard Modbus protocol data to the main control module 110;
the main control module 110 is further configured to send standard Modbus protocol data to the at least two upper computers 300 through the at least two upper computer interfaces 132 of the serial port extension module 130.
In this embodiment, the serial port extension module 130 includes a field device interface 131 and at least two upper computer interfaces 132, which may be RS-232/485 serial ports. The field device 200 can be connected via a field device interface 131, wherein the field device can be a field device for collecting data. And can be connected with at least two upper computers 300 through at least two upper computer interfaces 132, wherein, the upper computer 300 can be used for reading and processing the data collected by the field device, and can also be used for controlling or adjusting the parameters of the field device. Wherein, an upper computer interface can be connected with an upper computer, and the other upper computer interface is connected with other upper equipment.
The main control module 110, after receiving the raw data, may send the raw data to the protocol conversion module 120;
the protocol conversion module 120 may use a target protocol corresponding to the field device 200, which is preset or obtained by field programming. In one possible embodiment, a plurality of alternative protocols may be predetermined, and a target protocol may be determined from the plurality of alternative protocols based on a user selection, or based on automatic identification of field devices, or based on automatic identification of raw data. The target protocol is a data transmission protocol used by the field device in data transmission.
After the protocol conversion module 120 analyzes the raw data, standard Modbus protocol data may be obtained by adopting standard Modbus protocol encapsulation, and the standard Modbus protocol data is returned to the main control module 110.
The main control module 110 sends the standard Modbus protocol data to at least two upper computers 300 through at least two upper computer interfaces 132 of the serial port extension module 130.
According to the scheme, the upper computer can be enabled to pass through the Modbus protocol which is uniformly used in the industry, the rapid and convenient field devices which are in butt joint are different, the device data and the control device are obtained, the upper computer only needs a simple data address, the butt joint can be completed, and the research and development cost is greatly reduced.
In the scheme, optional configuration of a serial port 140 is further included;
the configuration serial port 140 is connected to the configuration device 400, and is configured to obtain a target protocol selection instruction through the configuration device 400, so as to determine a target protocol corresponding to the field device 200.
The configuration serial port 140 may adopt a C/S (client/server) structure, and is called and used by the protocol conversion module 120 through an interactive protocol of the field device. By configuring the device 400, a plurality of protocols of domestic and foreign common environmental protection devices can be selected. Parameters such as baud rate, check bit, data bit and stop bit of the serial port of the field device and the serial port of the upper computer can be configured according to actual conditions. If the field device is not in the built-in protocol, customized development can be carried out according to a specific communication protocol, and a set of selectable protocols is added, so that flexible configuration is carried out.
On the basis of the above technical solution, optionally, the system further includes a storage module 150;
the storage module 150 is connected to the main control module 110, and is configured to store candidate device protocols and store raw data of field devices.
The storage module may be a hard disk or other magnetic disk for data storage, and may be used to store configuration files, device protocol modules, field device data, and the like.
On the basis of the above technical solutions, optionally, the protocol conversion module 120 is specifically configured to:
determining a protocol type of the original data;
and if the original data adopts a non-standard Modbus protocol, analyzing the original data by adopting a target protocol corresponding to the field device 200.
On the basis of the above technical solutions, optionally, the protocol conversion module 120 is further configured to:
and if the original data adopt a standard Modbus protocol, analyzing the original data by adopting the standard Modbus protocol.
The protocol conversion module 120 may preferentially perform protocol identification on raw data of the field data device, and if the raw data is identified as a non-standard Modbus protocol, analyze the raw data using a target protocol corresponding to the field device 200. If the data is identified as a standard Modbus protocol, the raw data is analyzed using a target protocol corresponding to the field device 200. According to the scheme, the purpose of analyzing the original data of the field device quickly and accurately can be achieved.
In the technical solution provided in the embodiment of the present application, the protocol converter includes: the system comprises a main control module, a protocol conversion module and a serial port expansion module; wherein: the serial port expansion module is connected with the main control module, comprises a field device interface and at least two upper computer interfaces, is used for being connected with the field device through the field device interface so as to obtain the original data of the field device, and sends the original data to the main control module; the main control module is connected with the protocol conversion module and used for sending the original data to the protocol conversion module; the protocol conversion module is used for analyzing the original data by adopting a target protocol corresponding to the field device, packaging the original data to obtain standard Modbus protocol data, and returning the standard Modbus protocol data to the main control module; the main control module is also used for sending the standard Modbus protocol data to at least two upper computers through at least two upper computer interfaces of the serial port extension module. The technical scheme provided by the application can realize mutual conversion among a plurality of different protocols, thereby improving the compatibility of the protocol converter and avoiding the problem of high cost of the protocol converter caused by the need of independent development.
On the basis of the above technical solutions, optionally, the main control module 110 is further configured to:
acquiring a back control instruction of any one upper computer 300 through at least two upper computer interfaces 132 of the serial port extension module 130, and sending the back control instruction to the protocol conversion module 120;
the protocol conversion module 120 is further configured to analyze the inverse control instruction by using a standard Modbus protocol, and encapsulate the inverse control instruction by using a target protocol corresponding to the field device 200, so as to send the inverse control instruction to the field device 200 through the field device interface 131 of the serial port extension module 130.
On the basis of the above technical solutions, optionally, the main control module 110 is further configured to:
receiving the back control result of the field device 200 through the field device interface 131 of the serial port extension module 130;
the protocol conversion module 120 is further configured to analyze the back control result by using a target protocol corresponding to the field device 200, encapsulate the back control result by using a standard Modbus protocol, and send the back control result to the upper computer 300 through the at least two upper computer interfaces 132 of the serial port extension module 130.
The protocol converter provided by the scheme can also analyze and repackage the anti-control instruction sent by the upper computer and send the anti-control instruction to the field equipment. And the field device can be obtained and returned to the upper computer according to the execution result of the inverse control instruction. Through analysis and encapsulation in the transmission process, flexible control can be carried out on different field devices through an upper computer and an inherent standard Modbus protocol. And obtain a response result of the field device to the control.
Example two
Fig. 2 is a schematic diagram of a communication protocol converter of a second device according to an embodiment of the present application. As shown in fig. 2, the device comprises a power module, a main control module and a serial port expansion module, wherein the main control module has basic peripherals such as a CPU, a memory, a serial port and the like. The external power supply is electrically connected with the protocol converter through the power supply module, the serial port expansion module is connected with the main control module through an SPI (serial peripheral interface), the protocol converter is interactively connected with the field device through an RS-232/485 serial port, is interactively connected with the upper computer through an RS-485 serial port, and is interactively connected with the configuration computer through an RS-232 serial port of the main control module.
And S1, the external power supply provides a wide-voltage power supply input function for the protocol converter through the power supply module, and stable working voltage is ensured.
The S2 main control module is the core component of the protocol converter, provides hardware resources such as storage, configuration serial port and expansion serial port module, and the protocol conversion software runs in the module, and converts the equipment communication protocol into standard Modbus protocol through the internal conversion logic.
S3 for storing configuration files, device protocol modules, field device data, etc.
The S4 protocol conversion software is a core program of the protocol converter. Reading an internal configuration protocol, continuously acquiring original data of the field device S10 in a polling mode, and analyzing the original data into corresponding data according to the protocol of the field device. And when the S11 upper computer or other S12 upper equipment sends a standard Modbus protocol data acquisition command, packaging the corresponding data into a standard Modbus protocol format, and returning the standard Modbus protocol format to the S11 upper computer or other S12 upper equipment. When the S11 host computer or other S12 host devices send the standard Modbus protocol back control command, the command is packaged according to the device protocol, forwarded to the field device, the back control result is obtained, packaged into the standard Modbus protocol format, and returned to the S11 host computer or other S12 host devices.
And the S5 serial port expansion module is connected with the main control module through the SPI and is used for expanding a hardware serial port interface of the protocol converter, and the hardware serial port interface is respectively communicated with the field equipment and different upper computers through RS-232/485 serial ports, so that the system can flexibly adapt to different field environments.
The S6 is configured with serial port, which is the hardware interface of the main control module, and is interactively connected with the S13 configuration software through RS-232, and the two-way data communication is used for basic configuration for S4 protocol conversion.
The S7 device serial port is expanded by the S5 serial port expansion module, is in interactive connection with the S10 field device through RS-232/485, is in bidirectional data communication, and provides original data of the device for the use of S4 protocol conversion software.
And the serial port of the S8 upper computer is expanded by the S5 serial port expansion module, is in interactive connection with the S11 upper computer through RS-232/485, is in bidirectional data communication, and receives and returns a standard Modbus protocol message of the S11 upper computer.
And the other serial ports of the S9 and the other serial ports expanded by the S5 serial port expansion module are in interactive connection with other upper equipment of the S12 through RS-232/485, and are in bidirectional data communication, so that the data flow direction of the equipment is expanded, and the special application scene on the spot is adapted.
The S10 field device, the environment-friendly device used in actual field, is interactively connected with the serial port of the S7 device through RS-232/485, and provides original data of protocol conversion.
And the S11 upper computer is in serial connection with the S8 upper computer through the RS-232/485, and acquires the data of the field equipment or reversely controls the field equipment by sending a standard Modbus protocol command. At the moment, the upper computer can realize quick butt joint without developing a complex equipment protocol.
The functions of other upper equipment of S12 are consistent with those of the upper equipment of S11, and the upper equipment is particularly used for expanding the upper equipment, so that a plurality of upper machines are connected with one field equipment to acquire or reversely control data.
And S13 configuration software is arranged at a computer end and is in interactive connection with the S6 configuration serial port by using an RS-232 serial port line, the configuration software adopts a C/S structure and interacts configuration information with the S6 configuration serial port through a self-defined interactive protocol, and the configuration information is called and used by the S4 protocol conversion software. Through configuration software, protocols of various built-in domestic and foreign common environmental protection equipment can be selected, and parameters such as baud rate, check bits, data bits, stop bits and the like of the serial port of the equipment and the serial port of the upper computer can be configured according to actual conditions. If the field device is not in the built-in protocol, customized development can be carried out according to the specific communication protocol, and a protocol conversion module is added, so that flexible configuration is carried out.
The utility model discloses can make the host computer pass through the Modbus agreement that industry was unified to be used, quick convenient different field device of butt joint acquires equipment data and controlgear, and the butt joint can be accomplished to the host computer only need simple data address, the research and development cost that significantly reduces.
The utility model discloses support to dispose different equipment agreements, can be according to the field device condition, select in a flexible way. The built-in multiple equipment protocols can meet most of use scenes, reduce the test work of field equipment, improve the butt joint efficiency of equipment installers and really realize multiple purposes by one machine.
The utility model discloses support the customization development of equipment agreement, through the mode of loading agreement module, can realize quick development, improve customization efficiency, reduce the customization cost.
The utility model discloses reserve host computer extension serial ports, support many host computer equipment to link to each other with a field device simultaneously, compensatied the problem that the external resource of field device lacks, can adapt to the special applied scene in scene.
PREFERRED EMBODIMENTS
Fig. 3 is a schematic view of a usage scenario provided in the preferred embodiment of the present application. As shown in fig. 3, the portable computer is connected to the device communication protocol converter through an RS-232 serial port line, the configuration software at the computer end is opened, and after the serial port number, the baud rate, the data bit, the check bit, and the stop bit are set, the serial port is opened to complete the connection with the protocol converter. The configuration software acquires the configuration information in the protocol converter through a self-defined interactive protocol and displays the configuration information in each configuration item of the current configuration software. A plurality of environmental protection equipment protocols which are commonly used at home and abroad are built in the protocol converter, at the moment, the protocol of the Beijing environmental protection equipment is selected, and the baud rate, the data bit, the check bit and the stop bit of the serial port of the equipment are set to be consistent with the Beijing environmental protection equipment. And meanwhile, the customized development of the field device protocol is supported, so that flexible configuration is carried out. And setting address codes, baud rates, data bits, check bits and stop bits of the PLC or other upper computers according to actual conditions on site. After all the parameters are configured, clicking a storage button, packaging all the configuration information into a self-defined interactive protocol by the configuration software at the moment, sending the self-defined interactive protocol to the protocol converter through an RS-232 serial port line, and storing the configuration information in an internal storage for calling and using by the protocol conversion software after the protocol converter receives the configuration information.
Fig. 4 is a schematic diagram of the use provided by the preferred embodiment of the present application. As shown in fig. 4, the device communication protocol converter may provide a configuration display software to display related information, and one end of the device communication protocol converter is connected to the device through an RS-232 serial port line, and the other end of the device communication protocol converter is connected to a PLC (Programmable Logic Controller, PLC for short) or other upper computers through an RS-485 serial port line. The polling interval time of the protocol converter is set to 10 seconds, namely, the data of the equipment is acquired once every 10 seconds, the data is analyzed into corresponding data through the equipment protocol and stored in the cache, and when the PLC or other upper computers are called, the data in the cache is packaged into a standard Modbus protocol and returned. At the moment, the PLC or other upper computers can be quickly docked with the converted standard Modbus protocol without developing complex programs, so that various data of the field device can be conveniently and quickly acquired, or the field device is reversely controlled. Meanwhile, the problem that field equipment lacks external resources can be solved, and the method is suitable for special field application scenes.
In an application scene, a plurality of equipment communication protocol converters can be used to respectively correspond to different field equipment, and data butt joint can be quickly realized through a Modbus communication bus.
This scheme provides a device communication protocol converter, can carry out nimble configuration according to field device and host computer condition, converts different communication protocol into standard Modbus protocol to solve the problem that proposes in the above-mentioned background art.
The vehicle rear wheel steering control device, the medium and the electronic equipment provided in the above embodiments can operate the equipment communication protocol converter provided in any embodiment of the present application, and have corresponding functional modules and beneficial effects for operating the method. For details of the device communication protocol converter provided in any of the embodiments of the present application, reference may be made to the following description.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (7)
1. A device communication protocol converter, the protocol converter comprising: the system comprises a main control module, a protocol conversion module and a serial port expansion module; wherein:
the serial port expansion module is connected with the main control module, comprises a field device interface and at least two upper computer interfaces, is used for being connected with the field device through the field device interface so as to obtain the original data of the field device, and sends the original data to the main control module;
the main control module is connected with the protocol conversion module and used for sending the original data to the protocol conversion module;
the protocol conversion module is used for analyzing the original data by adopting a target protocol corresponding to the field device, packaging the original data to obtain standard Modbus protocol data, and returning the standard Modbus protocol data to the main control module;
the main control module is also used for sending the standard Modbus protocol data to at least two upper computers through at least two upper computer interfaces of the serial port extension module.
2. The protocol converter of claim 1, further comprising a configuration serial port;
the configuration serial port is connected with configuration equipment and used for obtaining a target protocol selection instruction through the configuration equipment so as to determine a target protocol corresponding to the field equipment.
3. The protocol converter of claim 1, further comprising a memory module;
the storage module is connected with the main control module and used for storing candidate device protocols and storing original data of field devices.
4. The protocol converter according to claim 1, wherein the protocol conversion module is specifically configured to:
determining a protocol type of the original data;
and if the original data adopt a non-standard Modbus protocol, analyzing the original data by adopting a target protocol corresponding to the field equipment.
5. The protocol converter of claim 1, wherein the protocol conversion module is further configured to:
and if the original data adopt a standard Modbus protocol, analyzing the original data by adopting the standard Modbus protocol.
6. The protocol converter of claim 1, wherein the master module is further configured to:
acquiring an anti-control instruction of any one upper computer through at least two upper computer interfaces of the serial port expansion module, and sending the anti-control instruction to the protocol conversion module;
the protocol conversion module is also used for analyzing the inverse control instruction by adopting a standard Modbus protocol, packaging by adopting a target protocol corresponding to the field device and sending the target protocol to the field device through a field device interface of the serial port extension module.
7. The protocol converter of claim 1, wherein the master module is further configured to:
receiving an inverse control result of the field equipment through a field equipment interface of a serial port expansion module;
the protocol conversion module is also used for analyzing the anti-control result by adopting a target protocol corresponding to the field device, packaging the anti-control result by adopting a standard Modbus protocol, and sending the anti-control result to the upper computer through at least two upper computer interfaces of the serial port extension module.
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Address after: 215000 No.12 Louyang Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Shencai Technology Co., Ltd Address before: 215000 No.12 Louyang Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: JIANGSU SHENCAI TECHNOLOGY Co.,Ltd. |