I am using Win CC K7.4.1.16 to communicate with a logo 8 FS4 with over Modbus TCP, log as firmware 1.81.01.27.6816C the communications works well but I cannot address the first input of the logo as a SCADA tag.

From the second input with addess 1x1.0 up to the 24th input with address 1x23.0 I have no problems, by extrapolation the first input address should be 1x0.0 but this is rejected by the SCADA system as being unavailable.

I could obviously redirect this input via another address and read the status but I would rather solve the problem correctly which I am sure will be helpful to those who come after me.

Thanks

Donald Pittendrigh

Please don't post twice for the same problem.

You made also here a topic for your problem:

Win CC communication with Loo 8

Closed cause question posted twice.

The second thread with the subject Win CC communication with Loo 8 is published within the conference SIMATIC WinCC.