Operating instructions for communication between RS485 (Modbus RTU) industrial RFID reader ck-fr03-a01 and PLC Mitsubishi fx5u

RS485（Modbus RTU） Industry RFID Reader writer CK-FR03-A01 Support the major PLC Integration and Application , This article will re introduce CK-FR03-A01 Use MELSOFT series GX Works3 Program （ Version is GX Works3 Version 1.065T） With MITSUBISHI FX5U PLC Of Modbus RTU signal communication .

 

1、 Instructions for use of the equipment

1.1、 Routine software and hardware description

The software and hardware used in this example are as follows ：

Software	GX-Works3 Version 1.065T
PLC	Mitsubishi FX5U
Reader	CK-FR03-A01

This example mainly shows Mitsubishi FX5U And CK-FR03-A01 On going Modbus RTU signal communication , The equipment used is different , The reading and writing of relevant data will also be different , It can be adjusted according to the corresponding development instructions .

1.2、 Wiring instructions

Put the card reader device A,B Line and PLC Of FX5U The ports can be connected correspondingly for communication .

Card reader device A,B Line , You can query the corresponding manual .

FX5U Need to put SDA And RDA After docking, it is connected with the card reader A Wire connection ,SDB And RDB After docking, it is connected with the card reader B Just connect the wires .

2、 Mitsubishi PLC Program

Ben PLC Use MELSOFT series GX Works3 Program , Version is GX Works3 Version 1.065T.

2.1、 Communication parameter configuration

After the new project , Conduct Modbus RTU Communication parameter configuration .

Open the project in the navigation box —— Parameters —— Module parameters ——485 A serial port .

chart 2.1 Configure communication

        In the basic setup , Protocol format selection MODBUS_RTU signal communication .

Detailed settings , Parity check , The stop bit and baud rate select appropriate parameters according to the corresponding reader configuration , In this example, the card reader CK-FR03-A01 For example , Parity is set to none , The stop bit is set to 1bit, The baud rate is set to 115200bps.

 

chart 2.2 Configure communication parameters

2.2、PLC Program

This routine only reads and writes the card reader as an example , It can be changed according to actual use .

2.2.1、 Instructions

The communication instruction used in this example is ADPRW, Used to communicate with the card reader Modbus RTU signal communication .

 

chart 2.3 ADPRW Instructions

 

chart 2.4 ADPRW Command parameters

With a card reader CK-FR03-A01 For example , The default station number is 2.

So the slave station number s1 fill 2, Function code s2 According to the required operation , For example, read data operation , be s2 fill 03.s3 Indicates the register address of the operation ,s4 Is the number of registers for the operation ,s5/d1 Is the starting address of the cache where the read data is stored ,d2 Is the execution state of the instruction .

Detailed instructions can be found by clicking GX-Works3—GX-Works3 help - Cross document search , Enter the corresponding command and click search .

2.2.2、PLC routine

This routine takes the card reader CK-FR03-A01 For example , Allocate according to the register , The starting address of the user area data of the tag is 10, Therefore, this example takes the read-write address 10 Take the data on as an example .

The operation of reading data is as follows ：

 

chart 2.5 Read data operation

This function is triggered by M1 Read data operation , Read the address of the card reader register 10 At the beginning 4 A register , And store the read data in D1000 In the start data register .

Write data as follows ：

 

chart 2.6 Write data operations

This function is triggered by M2 Read data operation , Put the data register D2000 At the beginning 4 A data register is written to the address of the reader register 10 At the beginning 4 In registers .