Modbus RTU Slave FB

2021-11-03T11:46:41.649000Z

Thank you for your suggestions Tim, (timvh)! The software is now working.

Modbus RTU Slave FB

2021-09-01T13:05:12.619000Z

You could use the FB ModbusRequest2, so you don't have to create devices in the device tree:
https://help.codesys.com/webapp/Qc2MKyULLzzWS3JELTbsDHGWaRw%2FModbusRequest2;product=IoDrvModbus;version=3.5.17.0
See also:
https://forge.codesys.com/forge/talk/Engineering/thread/60b62c103f/

To open the COM port, see:
https://help.codesys.com/webapp/RJFsL1rVvIWPJ9jLGcMefN90Huo%2FOpen;product=CAA%20SerialCom;version=3.5.17.0

Modbus RTU Slave FB

2021-08-31T15:32:39.034000Z

Dear Members,

I wonder if someone already managed to create a FB that emulates the Modbus Slave COM Port that is normally added to the Device Tree.
I need to do that via a FB, because I do not know how many slaves will be added. That information will be provided on site during the installation of the equipment, e.g via the visualization - 2 slaves, 3 slaves, .. 30 slaves.
I have created a FB that EXTENDS ModbusSlaveComPort, which is the same type of object that is added to the device tree. However, I do not know what to do next regarding how to create the channels and link the Slave(s) to the Master.

Any help is appreciated.

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