Multi-channel input and output data interaction system based on industrial communication bus

Abstract

The utility model relates to the field of industrial automation information transmission, in particular to a multipath input / output data interaction system based on an industrial communication bus, which comprises a programmable logic controller, a coupler and a plurality of input / output modules, and the coupler is connected with a plurality of input and output modules. According to the utility model, a simple and reliable data interaction system is developed in a traditional PLC input and output system mode, and the functions of automatic data acquisition, transmission and output are completed. Specifically, the system can achieve the functions of input and output module mounting quantity and connection point attribute confirmation, data transmission error state display and the like, simplifies the connection of the input and output modules, provides the data interaction reliability of the system, and greatly improves the stability and transmission efficiency of the industrial automation control field.

Description

Technical Field

[0001] The utility model relates to the field of industrial automation information transmission, and particularly relates to a multi-channel input-output data interaction system based on an industrial communication bus. Background Technique

[0002] In the field of modern industrial automation, efficient and accurate data interaction is the key to realizing intelligent production and control. With the rapid development of computer technology and communication technology, the industrial communication bus, as a bridge connecting various industrial devices and sensors, has become increasingly important. Traditional industrial communication methods mostly adopt point-to-point or star topology structures, which have problems such as complex wiring, high cost, and poor scalability. The industrial communication bus technology connects multiple devices through one or more buses, realizing centralized data transmission and processing, greatly simplifying the system structure, and reducing costs.

[0003] The multi-channel input-output data interaction method based on the industrial communication bus focuses on using the bus protocol to achieve parallel or serial data transmission. By defining a unified communication protocol and data format, this method ensures seamless docking between devices and realizes real-time data interaction. At the same time, the system supports multiple communication modes, such as synchronous data input-output, asynchronous communication, semi-synchronous communication, etc., to meet the data transmission requirements in different scenarios. Reliable data interaction based on the multi-channel input-output of the industrial communication bus can effectively play the role of the system and improve communication efficiency.

[0004] However, at the same time, the diversity of communication protocols between devices, the uncertainty of data formats, and the limitation of the number of connection modules have caused many troubles in actual application development. It is necessary to design a multi-channel input-output data interaction system based on the industrial communication bus. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and propose to design a multi-channel input-output data interaction system based on the industrial communication bus, realizing functions such as confirming the number of input-output modules mounted, the attributes of connection points, and displaying the data transmission error status.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A multi-channel input-output data interaction system based on an industrial communication bus includes a programmable logic controller (PLC), a coupler, and a plurality of input-output modules. The programmable logic controller is connected to the coupler, and the coupler is connected to the plurality of input-output modules.

[0008] Further, the coupler is connected to the first input-output module, and the first input-output module is sequentially connected to the plurality of input-output modules mounted later.

[0009] Furthermore, the coupler uses two serial port pins of each main control chip for information sending and receiving, and the subsequently mounted input / output modules are connected in sequence, all using serial connections. The last input / output module communicates with the coupler through a data interaction verification channel.

[0010] Further, the coupler and the input / output modules use the CAN communication method. All input / output modules are mounted on the same communication bus and connected to the coupler, and communicate with the coupler through a data interaction transmission channel.

[0011] Further, the number of the input / output modules does not exceed 32.

[0012] Further, the coupler has two core main control chips, and the two main control chips are respectively used for information communication and information control.

[0013] Further, the core chip of the main control board of the coupler uses netX90, and the chip is respectively used to complete the industrial communication bus control and the application layer usage.

[0014] Further, the input / output module is mainly used for collecting and outputting digital quantity, analog quantity input / output signals; the input quantity can be digital quantity, analog quantity, thermal resistor, thermocouple, etc., and the output quantity is digital quantity or analog quantity.

[0015] Further, the digital quantity is 0V or 24V, the analog quantity is ±10V, and the current is 4 - 20mA.

[0016] Further, the communication method between the programmable logic controller and the coupler uses an RJ-45 interface network connection, the longest transmission distance is 100 meters, and the data transmission protocols are Profinet, EtherCAT, CC-Link, CC-Link IE, etc.

[0017] The technical effects of the present utility model:

[0018] Compared with the prior art, the present utility model has developed a simple and reliable data interaction system in the traditional PLC input / output system mode, and completed the functions of automatic data collection, transmission, and output. Specifically, the present utility model can realize functions such as the confirmation of the number of mounted input / output modules and the attributes of connection points, and the display of data transmission error status, simplify the connection of the input / output modules, provide the reliability of system data interaction, and greatly improve the stability and transmission efficiency in the field of industrial automation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a connection block diagram of each module of the multi-channel input / output data interaction system based on the industrial communication bus of the present utility model.

[0020] In the figure, 10 is a programmable logic controller; 20 is a coupler; 30 is an input / output module; 40 is a data interaction verification channel; 50 is a data interaction transmission channel. Specific implementation manner

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specification.

[0022] Embodiment 1:

[0023] As shown in Figure 1 In this embodiment, a multi-channel input / output data interaction system based on an industrial communication bus is involved, including a programmable logic controller 10, a coupler 20, and an input / output module 30; the programmable logic controller 10 is connected to the input / output module 30 through the coupler 20. The programmable logic controller 10 serves as the controller of the system, controlling and monitoring various devices and processes to achieve automated control.

[0024] As a preferred implementation manner, the programmable logic controller 10 is a general-purpose PLC, and brands such as Siemens, Mitsubishi, and Omron can be selected to complete the acquisition and transmission of input / output signals.

[0025] As a preferred implementation manner, the coupler 20 mainly realizes data transmission based on an industrial bus protocol and is an intermediate connection module between the programmable logic controller 10 and the mounted input / output module 30. The coupler has two core main control chips, one for information communication and one for information control.

[0026] As a preferred implementation manner, the core chip of the main control board of the coupler adopts netX90, which has the functions of two core chips, one can complete industrial communication bus control and the other can complete application layer use.

[0027] As a preferred implementation manner, the input / output module 30 is mainly used for the acquisition and output of digital and analog input / output signals. The input quantity can be digital, analog, thermal resistance, thermocouple, etc., and the output quantity is digital or analog.

[0028] As a preferred implementation manner, the digital quantity is 0V or 24V, and the analog quantity is ±10V and the current is 4 - 20mA.

[0029] As a preferred embodiment, the communication mode between the programmable logic controller 10 and the coupler 20 is connected by an RJ-45 interface network, with a maximum transmission distance of 100 meters. The data transmission protocols are Profinet, EtherCAT, CC-Link, CC-Link IE, etc.

[0030] As a preferred embodiment, up to 32 input / output modules 30 can be set, such as Figure 1 shown, numbered from N1 - N X , where x is at most 32. There are two communication connection methods between the coupler 20 and several subsequent input / output modules 30.

[0031] The first feasible embodiment is: the coupler 20 is connected to the first input / output module 30, and the first input / output module 30 is successively connected to several subsequent input / output modules 30. This method uses two serial port pins of each main control chip for information sending and receiving. The subsequent input / output modules 30 are successively connected, all using serial connections to form an information closed loop. For the last input / output module 30, a verification message is sent, and the coupler 20 automatically counts the number of attached input / output modules 30, module properties, etc. This communication is completed through the data interaction verification channel 40.

[0032] The second feasible embodiment is: the coupler 20 and the input / output modules 30 use the CAN communication mode. All input / output modules 30 are mounted on the same communication bus and connected to the coupler 20 for data interaction. In this method, after the properties of the input / output modules 30 mounted at the back end of the coupler 20 are automatically counted, the CAN communication mode is used for information interaction during communication. This communication is completed through the data interaction transmission channel 50.

[0033] As a preferred embodiment, the communication mode between the programmable logic controller 10 and the coupler 20 is that after the power is turned on, there is two-way information transmission between the programmable logic controller 10 and the coupler 20. The programmable logic controller 10 transmits user configuration information to the coupler 20, and the coupler 20 uploads the information of the subsequent attached input / output modules 30 for information interaction, which is used to control and detect the input / output modules 30.

[0034] The utility model can realize the customization of the attributes of the input / output modules in the automatic control system. Through the intermediate coupler, a data transmission path is automatically established with the programmable logic controller, effectively solving problems such as the difficulty in confirming the number of mounted input / output modules, the attributes of connection points, and the difficulty in troubleshooting data transmission errors. It effectively improves the stability of automatic data transmission, facilitates troubleshooting, and can expand up to 1024 control points of input and output with different attributes. The utility model can realize signal acquisition, analysis, and transmission based on multiple industrial communication bus protocols (such as Profinet, EtherCAT, CC-Link, CC-Link IE), and realize the control output of specific functions. This system can be widely applied to the field of industrial automation control, such as robots, intelligent warehousing, logistics sorting, non-standard automation, intelligent equipment and other fields.

[0035] Details not described in the utility model are all well-known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model rather than to limit them. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the utility model, and they should all be covered by the scope of the claims of the utility model.

Claims

1. A multi-channel input-output data interaction system based on an industrial communication bus, characterized in that, It includes a programmable logic controller, a coupler, and several input / output modules. The programmable logic controller is connected to the coupler, and the coupler is connected to several input / output modules.

2. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, characterized in that, The coupler is connected to the first input / output module, and the first input / output module is sequentially connected to several input / output modules mounted later.

3. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 2, wherein The coupler uses two serial port pins of its respective main control chips for information sending and receiving. The input / output modules mounted later are sequentially connected, all using serial connections. The last input / output module communicates with the coupler through a data interaction verification channel.

4. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, wherein, The coupler and the input / output modules use the CAN communication method. All input / output modules are mounted on the same communication bus and connected to the coupler, and communicate with the coupler through a data interaction transmission channel.

5. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, wherein The number of the input / output modules does not exceed 32.

6. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, wherein The coupler has two core main control chips, and the two main control chips are respectively used for information communication and information control.

7. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, characterized in that The core chip of the main control board of the coupler uses netX90, and the chip is respectively used to complete industrial communication bus control and application layer use.

8. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 1, characterized in that, The input / output module is used for collecting and outputting digital and analog input / output signals; the input quantity is digital, analog, thermal resistance, and thermocouple, and the output quantity is digital or analog.

9. The multi-channel input / output data interaction system based on an industrial communication bus according to claim 8, wherein The digital quantity is 0V or 24V, the analog quantity is ±10V, and the current is 4 - 20mA.

10. The multi-channel input / output data interaction system based on an industrial communication bus according to any one of claims 1-9, characterized in that The communication method between the programmable logic controller and the coupler uses an RJ-45 interface network connection, with a maximum transmission distance of 100 meters, and the data transmission protocols are Profinet, EtherCAT, CC-Link, and CC-Link IE.

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