Hi

I'm having issues after a download to one of two HMI's (TP1200 ON TIA 15.1) There is comms on the one HMI but other does not have comms. I have loaded the working HMI program into the second and then it works fine. So my deduction is that it must be some form of comms setting, which I did not change from original files received from client.

The HMI's are linked to two 400 H CPU's master and slave. The hardware configuration on these was not altered.

My question is in the connections section of the HMI's. Here I can see both PCU's and the comms settings are as they should be according to the PLC hardware configuration.

HMI_1 PLC_Changer  - PLC Address 0 EXP Slot 0, Rack 0

HMI_2 PLC_Changer  - PLC Address 2 EXP Slot 2, Rack 0

The PLC_Changer (on HMI 1) and PLC_Changer_1 (on HMI 2) the address, rack and expansion slot, I can not verify. How do I verify as it does not exist in the S7 PLC software either?

Where is the configuration for the PLC Changers meant to be located?

Hello,

Have you seen this link:

Connecting SIMATIC HMI panels with a SIMATIC S7-400H (WinCC V16 and STEP 7 V5.6)

Best regards,

Wizard