Hi,
I'm having problem with communicating to PLC Siemens S7-1200. I've considered the settings, that must be made to connect:
What else should I check?
There is nothing else to do (other than creating DBs that are not optimized, but that has nothing to do with the connection status).
Are you sure you can ping the IP address of the PLC and that there is no firewall blocking port 102?
Did you power-cycle the PLC after changing and downloading the required hardware settings?