How to simulate PLC serial port through serial port - Database & Sql Blog Articles

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one. Customer requirements: CX-P and CX-Simulator software are installed on the PC. You need to access the CX-P data in the Simulator through the serial port control of the VB program.

two. Since the Cx-P runs in the Simulator, it will simulate the CLK network or ETN network connection. At this time, sending the FINS command to the network number and node number will return the response data.

The specific network number and node number are as follows:

At this point, sending 0501 to 1.10.0 via Finsgateway will return the CPU information of CJ1M as follows:

At this point, any configuration software accesses the network number and node number, and can access the data of the CX-P in the Simulator.

three. However, the Simulator cannot simulate the serial port connection at present, so the Cx-P cannot connect to the Simulator by selecting the communication method of Sysmacy. At this time, sending the FINS command to the network number and node number of the Finsgateway serial unit will return the software information of the Fisngateway.

Therefore, only through the actual serial port emulation function of Cx-Simulator, a COM1 port of the computer is emulated as the serial port of the CPU of the plc, and the SysmacWay communication mode is set, and the following figure is set in the setting of the CX-S:

Then connect to another serial port of the computer, send data from another serial port, and read and write data of CX-Simulator. In this way, you can read and write data in CX-P, and enter the following figure:

Send the SysmacWay command: @00RD0000000452*CR

Returns: @00RD00FFFFBBBBCCCC000056*CR

The connection lines of the two serial ports of the computer are as follows:

2 --- 3

3 --- 2

5 --- 5

7 --- 8

8 --- 7

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