Hello
I want to write my own HMI program that will communicate with a Siemens S7-300 via the Ethernet port.
I know how to open a port in the PC that will send data over TCP. What I need to know is:
1. What do I need to do in the PLC
2. How the message should be written
I want to write my own HMI program that will communicate with a Siemens S7-300 via the Ethernet port.
I know how to open a port in the PC that will send data over TCP. What I need to know is:
1. What do I need to do in the PLC
2. How the message should be written