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 Post subject: Beijer T4A and S7-1200 with Modbus RTU
PostPosted: Fri Sep 09, 2016 1:33 am 

Joined: Fri Sep 09, 2016 1:16 am
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hey guys,

I'd like to built a communication between my T4A and my PLC S7-1200 over Modbus RTU.

Information on my running System:
System 1: Beijer T4A (Master) over Modbus RTU to a selfmade microcontroller (Slave)
Here i Used COM2.

Now I want to to give some Data from System 1 (COM2) to my PLC (COM4) by using my Beijer Display as a Converter.
The PLC has to be Master, so i created a new additional Controller in iX2.2 as Modbus Slave.

I also made the direcetion of some Data-Transfer from Controller 1 to Controller 2 (COM2 -> COM4)


By using COM4 I want to talk to my PLC S7-1200 with CommunicationBoard CM1241 by using RS485 MODBUS RTU.


Questions:

1) Is my planned way of communication possible ? especially by using the direction-Option of Data Transfer in the iX2.2

2) How do I communicate with the PLC? Some TIA-Advice needed

3) Has someone made a Modbus RTU communication to T4A in TIA Portal ?


Thanks for helping!


lg Ben


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