Good day all.
I need assistance fixing this address error on my OP7 after a new program was downloaded to the HMI. The HMI was connected to the PLC and this message came up. "$551 AS Address 4 not possible"

 

Check the PLC MPI address is correct in the HMI project, otherwise check you haven’t accidentally dislodged/damaged the MPI cable from the HMI to the PLC or moved terminating resistor switches on MPI plugs.

 

How or where do I check the PLC MPI address in the HMI project please? I wouldn't mind detailed explanation because I am a beginner in this, thanks.

 

If you are using WinCC flexible software, google: WinCC flexible connection. This will give you a 43 second YouTube video of where to find this setting. Let me know if you are using the previous software Protool.