CODESYS - the IEC 61131-3 automation software

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PostPosted: Thu Jun 08, 2017 10:00 am 
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Joined: Wed Jun 07, 2017 12:48 pm
Posts: 2
Hi everyone,

I have a thermostat connected to network over ModBus TCP/IP protocol.
I am trying to read some data from that thermostat with no success.

Is there any good tutorial how to do that or can anyone help me?

SOLVED: In ModbusTCPSlave I/O Mapping menu i had wrong setting in "älways update variables" drop down manu. If you don't have any variables in program it has to be set on "Enable 2 (Always in bus cycle task)"

Thanks,
Jan


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