Siemens S7-200PLC User Manual page 20

Run the VCOMM virtual serial port software on the PC, set the simulated virtual serial port on the
PC. Select VCOMM as Client mode, initiatively to connect the server-side equipment. Choose the
device detector to create the virtual serial port.
Add a virtual serial port, the remote server IP address = ES-ETH-PPI IP address, remote server
monitoring port = ES-ETH-PPI port.
Click OK and exit the software and re-run VCOMM, the client side VCOMM will take the initiative to
connect the server side with IP address 192.168.1.250, port number 27011, it will create a new
serial port COM3 after establishing the connection, and it will appear in the Device Manager of the
Windows system, then you choose this serial port in your application software, such as STEP7
Micro/WIN.
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