Connecting to Siemens S7-300 PLC

The ISO-on-TCP protocol is used for connection to the PLC, see Connecting to 1200 for your reference.

Input correct TSAP number in the WebHMI connection settings:

• for CPU with built-in Ethernet port use TSAP number 0200, 0301
• for CPU without Ethernet port and CP343-1 Ethernet communication module use TSAP number 0302