A module for PLC backplane to multi-channel serial port

Abstract

The utility model relates to the field of industrial automation technology, specifically a module for PLC backplane to multi-channel serial port, including a serial port interface module, a backplane interface module, a data processing unit, a power supply module and a protection circuit; the serial port interface module is connected to the backplane interface module through a backplane slot or a connector; the data processing unit is connected to the serial port interface module and the backplane interface module through an internal bus. The utility model supports multiple serial port interfaces, including RS232, RS485, etc., through the serial port interface module, and is closely connected to the backplane interface module through the backplane slot or a special connector, so that the PLC system can be easily expanded to multiple external devices, realizing flexible configuration of one machine with multiple controls, and enhancing the scalability and compatibility of the system. The backplane interface module serves as a bridge between the module and the PLC backplane, ensuring high speed and stability of data transmission. Its standardized design facilitates rapid installation and replacement, reduces maintenance costs, and improves the overall integration and reliability of the system.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automation, in particular to a module used for converting a PLC backplane to multiple serial ports. Background Art

[0002] With the rapid development of industrial automation technology, PLC (Programmable Logic Controller) as the core component of industrial control system, its performance and scalability have become the key factors affecting the efficiency and flexibility of the entire production system. In a complex industrial environment, PLC often needs to communicate with a variety of external devices to achieve real-time data exchange and accurate transmission of control instructions. Therefore, the PLC backplane to multi-channel serial port module came into being. As a bridge between PLC and external devices, it can significantly improve the communication capability and scalability of the system. When processing large amounts of data or high-frequency communications, existing modules may cause communication delays or packet loss due to insufficient internal bus bandwidth or limited data processing capabilities. This not only affects the real-time performance of the system, but may also cause unnecessary interference and losses to the production process. PLCs and external devices of different brands and models often use different communication protocols and standards, and existing modules may have deficiencies in compatibility. This increases the difficulty and cost of system integration and limits the user's choice. Utility Model Content

[0003] The utility model aims to provide a module for PLC backplane to multi-channel serial port conversion, so as to solve the problems of limited communication efficiency and insufficient compatibility of existing PLC backplane serial ports mentioned in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A module for PLC backplane to multi-channel serial port conversion, comprising a serial port interface module, a backplane interface module, a data processing unit, a power supply module and a protection circuit;

[0006] The serial port interface module is connected to the backplane interface module through a backplane slot or connector; the data processing unit is connected to the serial port interface module and the backplane interface module through an internal bus, and the data processing unit is also connected to the serial port interface module and the backplane interface module through a control signal line for transmitting control instructions and status information; the power supply module provides power to other power-consuming modules and is connected to each module through a power supply line.

[0007] Preferably, the serial port interface module is used to receive and send data frames from an external serial port device. The serial port interface module includes a serial port controller for initialization, configuration and data transmission and reception functions of serial port communication, providing a physical interface for connecting to an external serial port device and a signal conditioning circuit for conditioning received serial port signals.

[0008] Preferably, the serial port standards include RS-232, RS-422, and RS-485 interfaces, and the physical interface includes DB-9 and DB-25.

[0009] Preferably, the backplane interface module is used to package data frames of multiple serial ports into a unified backplane communication data stream format and transmit it to the PLC CPU, and is also used to receive PLC CPU feedback data and unpack it and send it to the corresponding serial port interface module.

[0010] Preferably, the backplane interface module includes a backplane connector, a data buffer for temporarily storing data frames to be sent or received, and a control logic circuit for implementing data packaging, parsing and routing.

[0011] Preferably, the data processing unit is used for processing, encoding, decoding and routing data, receiving data frames from the serial port interface module, encoding, checking, etc., and then sending them to the PLC CPU through the backplane interface module. It is also used to receive feedback data from the PLC CPU, decode it and send it to the corresponding serial port interface module.

[0012] Preferably, the data processing unit includes an FPGA microcontroller, an internal bus and a memory for storing programs and data, and the internal bus is used to connect the data transmission channels between the microprocessor and each module.

[0013] Preferably, the power supply module is used to provide stable electric energy for the entire module, receive external power input, and provide the required power supply voltage for each module after filtering and voltage stabilization.

[0014] Preferably, the power module includes a power input interface, a filter circuit and a voltage stabilizing circuit.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the module for PLC backplane to multi-channel serial port, the serial port interface module supports multiple serial port interfaces, including RS232, RS485, etc., and is closely connected to the backplane interface module through the backplane slot or special connector, so that the PLC system can be easily expanded to multiple external devices, realizing flexible configuration of one machine with multiple controls, and enhancing the scalability and compatibility of the system. The backplane interface module serves as a bridge between the module and the PLC backplane, and the module ensures high speed and stability of data transmission. Its standardized design facilitates rapid installation and replacement, reduces maintenance costs, and improves the overall integration and reliability of the system. The data processing unit is a core component, and the data processing unit is closely connected with the serial port interface module and the backplane interface module through an internal efficient bus system to realize rapid data processing and real-time transmission. In addition, through the connection of the control signal line, the data processing unit can accurately control the working status of each module, optimize the data flow path, and improve the overall operation efficiency of the system.

[0017] In the module used for PLC backplane to multiple serial ports, the power module provides a stable and reliable power supply for the entire system. Through a carefully designed power distribution network, it ensures the stable operation of each power module under complex working conditions. Its efficient and energy-saving design reduces system energy consumption and extends the service life of the equipment. The protection circuit serves as a safety barrier for the system. The protection circuit monitors the working status of each module in real time. When abnormal conditions such as overvoltage, overcurrent, and short circuit occur, the power supply is quickly cut off or other protective measures are taken to effectively prevent equipment damage and data loss, and ensure the safe and stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, further detailed explanation is provided, but the accompanying drawings do not constitute a limitation to the present invention.

[0019] Figure 1 This is a system composition block diagram of the utility model. DETAILED DESCRIPTION

[0020] The following will combine the embodiments of the utility model and the drawings of the specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "vertical", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] A module for PLC backplane to multiple serial ports, such as Figure 1 As shown, it includes a serial port interface module, a backplane interface module, a data processing unit, a power supply module and a protection circuit; the serial port interface module is connected to the backplane interface module through a backplane slot or a connector; the data processing unit is connected to the serial port interface module and the backplane interface module through an internal bus, and the data processing unit is also connected to the serial port interface module and the backplane interface module through a control signal line for transmitting control instructions and status information; the power supply module provides power to other power-consuming modules, and is connected to each module through a power line. Through the serial port interface module, it supports multiple serial port interfaces, including RS232, RS485, etc., and is closely connected to the backplane interface module through a backplane slot or a special connector, so that the PLC system can be easily expanded to multiple external devices, realizing flexible configuration of one machine with multiple controls, and enhancing the scalability and compatibility of the system. The backplane interface module serves as a bridge between the module and the PLC backplane, and the module ensures high-speed and stable data transmission. Its standardized design facilitates quick installation and replacement, reduces maintenance costs, and improves the overall integration and reliability of the system. As a core component, the data processing unit is closely connected to the serial port interface module and the backplane interface module through an efficient internal bus system to achieve fast data processing and real-time transmission. In addition, by controlling the connection of the signal line, the data processing unit can accurately control the working status of each module, optimize the data flow path, and improve the overall operation efficiency of the system.

[0023] The power module provides a stable and reliable power supply for the entire system. Through a carefully designed power distribution network, it ensures the stable operation of each power module under complex working conditions. Its efficient and energy-saving design reduces system energy consumption and extends the service life of the equipment. The protection circuit serves as a safety barrier for the system. The protection circuit monitors the working status of each module in real time. When abnormal conditions such as overvoltage, overcurrent, and short circuit occur, the power supply is quickly cut off or other protective measures are taken to effectively prevent equipment damage and data loss, and ensure the safe and stable operation of the system.

[0024] Furthermore, the serial port interface module is used to receive and send data frames from external serial port devices. The serial port interface module includes a serial port controller for serial port communication initialization, configuration and data receiving and sending functions, providing a physical interface for connecting to external serial port devices and a signal conditioning circuit for conditioning received serial port signals. The serial port standards include RS-232, RS-422, and RS-485 interfaces, and the physical interfaces include DB-9 and DB-25, so that the module can be widely compatible with different types of external serial port devices, thereby improving the versatility and expansibility of the system.

[0025] Specifically, the backplane interface module is used to package the data frames of multiple serial ports into a unified backplane communication data stream format and transmit it to the PLC CPU. It is also used to receive PLC CPU feedback data and unpack it and send it to the corresponding serial port interface module. The backplane interface module includes a backplane connector, a data buffer for temporarily storing data frames to be sent or received, and a control logic circuit for realizing data packaging, parsing and routing. It not only simplifies the communication process between the PLC CPU and multiple serial port devices, but also improves the efficiency and accuracy of data transmission.

[0026] Among them, the data processing unit is used for data processing, encoding, decoding and routing, receiving data frames from the serial port interface module, encoding, checking, etc., and then sending them to the PLC CPU through the backplane interface module. It is also used to receive feedback data from the PLC CPU, decode it and send it to the corresponding serial port interface module. The data processing unit includes an FPGA microcontroller, an internal bus and a storage device for storing programs and data. The internal bus is used to connect the data transmission channel between the microprocessor and each module. The high performance and programmability of the FPGA enable the data processing unit to flexibly respond to different data processing requirements and improve the processing capability and flexibility of the system.

[0027] In addition, the power module is used to provide stable electric energy for the entire module. It receives external power input and provides the required power voltage for each module after filtering and voltage stabilization. The power module includes a power input interface, a filtering circuit and a voltage stabilization circuit to ensure that each module can work stably and reliably under complex working conditions and reduce the system failure rate caused by power fluctuations.

[0028] The working principle of this module for PLC backplane to multiple serial ports: The PLC backplane to multiple serial port module receives data from external devices through the serial port interface module, and after being processed by the data processing unit, it is forwarded to other parts of the PLC system through the backplane interface module. At the same time, the power supply module and protection circuit ensure stable and reliable operation of the system. This modular design makes the system highly scalable and flexible, and can easily adapt to different industrial automation control needs.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A module for PLC backplane to multi-channel serial port, characterized by: It includes a serial port interface module, a backplane interface module, a data processing unit, a power module and a protection circuit; The serial port interface module is connected to the backplane interface module through a backplane slot or connector; the data processing unit is connected to the serial port interface module and the backplane interface module through an internal bus, and the data processing unit is also connected to the serial port interface module and the backplane interface module through a control signal line for transmitting control instructions and status information; the power supply module provides power to other power-consuming modules and is connected to each module through a power supply line.

2. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The serial port interface module is used to receive and send data frames from an external serial port device. The serial port interface module includes a serial port controller for initialization, configuration and data receiving and sending functions of serial port communication, providing a physical interface for connecting to an external serial port device and a signal conditioning circuit for conditioning the received serial port signal.

3. The module for converting PLC backplane to multiple serial ports according to claim 2, characterized in that: The serial port standards include RS-232, RS-422, and RS-485 interfaces, and the physical interfaces include DB-9 and DB-25.

4. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The backplane interface module is used to package the data frames of multiple serial ports into a unified backplane communication data stream format and transmit it to the PLC CPU. It is also used to receive PLC CPU feedback data and unpack it and send it to the corresponding serial port interface module.

5. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The backplane interface module includes a backplane connector, a data buffer for temporarily storing data frames to be sent or received, and a control logic circuit for implementing data packaging, parsing and routing.

6. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The data processing unit is used for data processing, encoding, decoding and routing. It receives data frames from the serial port interface module, performs encoding and verification, etc., and then sends them to the PLC CPU through the backplane interface module. It is also used to receive feedback data from the PLC CPU, decode it, and send it to the corresponding serial port interface module.

7. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The data processing unit comprises an FPGA microcontroller, an internal bus and a memory for storing programs and data. The internal bus is used to connect the microprocessor and the data transmission channels between various modules.

8. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The power supply module is used to provide stable electric energy for the entire module, receive external power input, and provide the required power supply voltage for each module after filtering and voltage stabilization.

9. The module for converting PLC backplane to multiple serial ports according to claim 1, characterized in that: The power supply module includes a power input interface, a filter circuit and a voltage stabilizing circuit.

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