Hello,

I am currently having the same problem with WinCC 7.4.
I read zeros on every value, but I get good value health unless I plug out the cable.
If I use an external tool - for example qModMaster I read all data correctly.
Has anyone found some kind of a solution for this?

Best Regards,
Nikola Hadjinikolov

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Split from Modicon Modbus TCP/IP communication driver in TIA Wincc Professional v14 SP1.

Hello again guys,

I found my problem. I used the modbus driver for Premium/Micro PLC, but used the addressing for Compact/Quantum and there was just zeros at those registers I guess. When I corrected this, all was OK.

Regards,

Nikola Hadjinikolov