Hello, I’m using the modbus RTU with the X20CS1030 to connect to up to 5 devices and read information from them. I want to read the information from one device at a time so I have created a state machine where I read the information from the first one, after the reading has done I enable the readi…

Hello Stephan, thank you for your reply but it doesn’t satisfy my requirements. I solved the problem using the MBMCmd FB. It’s faster and more flexible. Thank you for your support

Hello Andrea, In the appendix you will find an example of Modbus RTU communication via RS485. You can use the event variable to control communication with the devices. Regards Stephan Modbus.zip (81.5 KB)

Hello Andrea, A data object is specified at the MBMopen function block. Each line in the data object corresponds to a Modbus function. The recordnum output from the MBMaster function block shows which line in the data object is currently being processed by the Modbus master. The execute output fr…

How MBMaster really works?

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How MBMaster really works?

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