Hi All,

I am using a CPU 1515-2, IM-155-6, few IO cards and an HMI TP 177B 6".  The CPU talks to the IM just fine and I've succesfully completed programming assignments to the IO cards.  However, I cannot talk to the HMI.

I can ping the HMI via my laptop in CMD but when I go online in TIA my 1515 blinks the red LED showing error and when I hover over the issue in TIA the HMI slot under Distributed I/O says "not reachable".

I've tried physically connecting to the HMI via the CPU and the IM ethernet/PROFINET ports but still the same issue.

Any suggestions as to what may be the issue?  Thanks in advance

Regards,
Rafid

Hello Rafid;

The following document has a section that explains how to connect an operator panel that has no S7-1500 channel to your CPU. Have a  look at the screenshot below, then study the contents of the link.

Which panels can communicate with a SIMATIC S7-1200 or S7-1500 in the TIA Portal?

Hope this helps,

Daniel Chartier