CODESYS - the IEC 61131-3 automation software

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PostPosted: Tue Apr 10, 2018 2:04 pm 

Joined: Mon Jan 22, 2018 10:07 am
Posts: 47
I need to configure my Raspberry Pi, that handle valves and controls, as a TCP Modbus Slave.
The problem is that the application is a porting of another application and for compatibility I need to leave the same Modbus registers.
I need to configure an array of 600 elements of DINT contiguous, another area configured like array of 600 elements of REAL, a 600 bit array area and some other bits distributed in different other areas.

I have configured the system as the following image illustrates...

I have the following questions:
[*] the controller can act at the same time as a master and as a client in Modbus TCP?
[*] how can I set the right Modbus area to be available exactly as previous ones? For me isn't so clear the area configuration in the left side of the configuration Modbus windows. I checked the "Modbus TCP Slave Device I/O Mapping" but is not clear for me how to proceed to configure addresses I need.


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