Issue :
Error message "C32CS Cannot open port " appear in Micom P543 relay during communication.

Product line:
Easergy P543

Resolution:
It's linked with the Easergy Studio installation. A proper installation of Easergy Studio shall prevent this issue.

After installation ,Please check if ports are set correctly (COM port number) &
Please check, if they used Ethernet connection and propose they use "Quick Connect" with defaults (beside IP addr) if you will communicate though Ethernet

Thanks to contact our customer care with your .studio file with setting, snap shot of the relay & label's picture from front HMI.

Released for: Schneider Electric Egypt and North East Africa