CN217932499U

CN217932499U - Mitsubishi PLC data acquisition equipment

Info

Publication number: CN217932499U
Application number: CN202221686615.0U
Authority: CN
Inventors: 斯晓强; 窦建中
Original assignee: Huzhou Institute Of International Innovation Harbin University Of Technology Robot
Current assignee: Huzhou Institute Of International Innovation Harbin University Of Technology Robot
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-29
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a Mitsubishi PLC data acquisition device, which comprises an MCU; the MCU acquires data of the PLC through an RS232 or RS422 or RS485 interface module; the MCU sends the acquisition command data through a serial port, converts the acquisition command data into interface protocol format data of an RS232/RS422/RS485 interface module through a serial port conversion chip respectively, and sends the interface protocol format data to the PLC; the data responded by the PLC is converted into serial port data through a conversion chip and transmitted to the MCU; and the MCU transmits the acquired PLC data to the cloud server through the network module. The utility model discloses a set up MCU and gather PLC data and upload the high in the clouds; the gateway is directly connected with the PLC to read and write data, an additional expansion module is not needed, and hardware cost is reduced; the original PLC project does not need to be modified, and the time cost and the possibility of errors caused by modification are reduced. The gateway has various data uploading modes and high flexibility. The optimal mode can be selected according to the site environment, and additional arrangement of network lines for network communication is not needed to increase cost.

Description

Mitsubishi PLC data acquisition equipment

Technical Field

The utility model discloses industrial equipment belongs to technical field, especially relates to a Mitsubishi PLC data acquisition equipment.

Background

Programmable Logic Controllers (PLCs) are digital arithmetic-operating electronic systems designed specifically for use in industrial environments. It uses a programmable memory, in which the instructions for implementing logical operation, sequence control, timing, counting and arithmetic operation are stored, and utilizes digital or analog input and output to control various mechanical equipments or production processes.

Currently, data acquisition for mitsubishi PLC generally requires the assistance of other modules or the modification of the original PLC engineering, which increases hardware and time costs. The data uploading communication mode of the acquisition module is too single, and the flexibility is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a Mitsubishi PLC data acquisition device, which is used for acquiring PLC data and uploading the PLC data to the cloud end by arranging an MCU; the gateway is directly connected with the PLC to read and write data, an additional expansion module is not needed, and the hardware cost is reduced; the original PLC project does not need to be modified, and the time cost and the possibility of errors caused by modification are reduced. The gateway has various data uploading modes and high flexibility. The optimal mode can be selected according to the field environment, and additional arrangement of network lines for network communication is not needed to increase cost.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a Mitsubishi PLC data acquisition device, which comprises an MCU; the MCU is also electrically connected with the PLC, the power supply module, the indicator light module and the USB module respectively; the MCU acquires data of the PLC through an RS232 or RS422 or RS485 interface module; the MCU sends the acquisition command data through a serial port, converts the acquisition command data into interface protocol format data of an RS232/RS422/RS485 interface module through a serial port conversion chip and then sends the interface protocol format data to the PLC; the data responded by the PLC is converted into serial port data through a conversion chip and transmitted to the MCU; and the MCU transmits the acquired PLC data to the cloud server through the network module.

Further, the power module supplies power for the MCU.

Further, the network module comprises a network port module, a WIFI module, a 4G module and a 5G module.

Further, the network port module adopts a W5500 network protocol stack chip; MCU passes through the SPI interface and is connected W5500 network protocol stack chip, and rethread vary voltage chip converts to the RJ45 interface.

Further, the MCU is connected with the 4G module and the WIFI module through a UART interface.

Further, the MCU is connected with the 5G module through a USB interface.

Further, the MCU controls an indicator light module through the GPIO pin, and the indicator light module is used for displaying the working state of the equipment.

Further, serial port data of the MCU is converted into USB data through a CH340 chip.

The utility model discloses following beneficial effect has:

the utility model discloses a set up MCU and gather PLC data and upload the high in the clouds; the gateway is directly connected with the PLC to read and write data, an additional expansion module is not needed, and the hardware cost is reduced; the original PLC project does not need to be modified, and the time cost and the possibility of errors caused by modification are reduced. The gateway has various data uploading modes and high flexibility. The optimal mode can be selected according to the field environment, and additional arrangement of network lines for network communication is not needed to increase cost.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a system block diagram of a Mitsubishi PLC data acquisition device;

fig. 2 is a circuit diagram of the MCU data conversion circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model relates to a mitsubishi PLC data acquisition device, which comprises an MCU; the MCU is also electrically connected with the PLC, the power supply module, the indicator light module and the USB module respectively; the MCU adopts an STM32 microcontroller;

the power supply module supplies power to the MCU; the MCU controls the indicator light module through the GPIO pin, and the indicator light module is used for displaying the working state of the equipment; the LED indicating lamps are 5-clock indicating lamps with different colors, and the different colors respectively represent different meanings, including power supply states, equipment running states, equipment cloud-up states, data acquisition indication and equipment faults;

serial port data of the MCU is converted into USB data through a CH340 chip; the system is used for configuring configuration information such as acquisition parameters; the PC is convenient to debug by connecting a MiniUSB cable with gateway equipment through the USB module;

the MCU acquires data of the PLC through an RS232 or RS422 or RS485 interface module; selecting a corresponding module according to a communication protocol format supported by the PLC;

the MCU transmits the acquired command data through the serial port, converts the acquired command data into interface protocol format data of an RS232/RS422/RS485 interface module through a serial port conversion chip and then transmits the interface protocol format data to the PLC; the data responded by the PLC is converted into serial port data through a conversion chip and transmitted to the MCU;

the MCU transmits the acquired PLC data to the cloud server through the network module;

the network module comprises a network port module, a WIFI module, a 4G module and a 5G module, the MCU is connected with the PHY chip LAN8720 through an RMII interface and then is converted into an RJ45 interface which is a common network cable socket in life through a transformer chip; the network port module adopts a W5500 network protocol stack chip; MCU passes through the SPI interface and is connected W5500 network protocol stack chip, and rethread vary voltage chip converts to the RJ45 interface, and MCU passes through UART interface connection 4G module and WIFI module, and MCU passes through USB interface connection 5G module.

As shown in fig. 2, the present embodiment is a conversion circuit for UART data and RS485 data of a microcontroller;

the UART sending pin of the microcontroller is connected with the 6 th pin of the conversion chip, data is converted into differential signals, and A and B signals are output through

pins

12 and 13. Similarly, data on the AB bus can be converted into TTL signals through a chip, and the TTL signals are connected with a microcontroller through 3 pins, namely, RS485 data of the bus is converted into UART data. The input and output conversion state of the chip is controlled by 4 and 5 pins, and the microcontroller is connected with and controls the two pins through a GPIO (general purpose input/output) to realize the input and output conversion of data. And a 120-ohm matching resistor R3 is added between the AB signals, so that the anti-interference capability is improved.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended to aid in the description of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The Mitsubishi PLC data acquisition equipment is characterized by comprising an MCU;

the MCU is also electrically connected with the PLC, the power supply module, the indicator light module and the USB module respectively;

the MCU acquires data of the PLC through an RS232 or RS422 or RS485 interface module;

the MCU sends the acquisition command data through a serial port, converts the acquisition command data into interface protocol format data of an RS232/RS422/RS485 interface module through a serial port conversion chip and then sends the interface protocol format data to the PLC;

the data responded by the PLC is converted into serial port data through a conversion chip and transmitted to the MCU;

and the MCU transmits the acquired PLC data to the cloud server through the network module.

2. The Mitsubishi PLC data collection device according to claim 1, wherein the power module supplies power to the MCU.

3. The Mitsubishi PLC data collection device according to claim 1, wherein the network module comprises a portal module, a WIFI module, a 4G module and a 5G module.

4. The Mitsubishi PLC data acquisition device according to claim 3, wherein the network port module employs a W5500 network protocol stack chip; MCU passes through the SPI interface and is connected W5500 network protocol stack chip, and rethread vary voltage chip converts to the RJ45 interface.

5. The Mitsubishi PLC data collection device according to claim 3, wherein the MCU connects the 4G module and the WIFI module through a UART interface.

6. The Mitsubishi PLC data collection device according to claim 3, wherein the MCU is connected to the 5G module through a USB interface.

7. The Mitsubishi PLC data acquisition device according to claim 1, wherein the MCU controls an indicator light module through a GPIO pin, and the indicator light module is used for displaying the working state of the device.

8. The Mitsubishi PLC data acquisition device according to claim 1, wherein serial port data of the MCU is converted into USB data through a CH340 chip.