Siemens S7-300 User Manual page 14

Click "Login" to enter the configuration interface.
You must firstly click"OK" to effect the revised parameters(parameters not saved at this time) after
you revise the parameters in every interface ,then finally click the "Apply Settings / Restart" to save
parameters and restart the ETH Adapter CN to work with the new parameters and then exit the
setting software. As shown below:
About the parameters configuration details, please read the "Device Manager Parameters
setting software manual".
After you configure the ETH Adapter CN parameters, you need to run VCOMM virtual serial port
software on the PC, simulate the ethernet interface of ETH Adapter CN as serial port (COM port)
on the PC, then choose this serial port in the local connection of STEP7 software ,like you use
the traditional PC Adapter.
Notice:The COM port of local connection in the "set PG/PC interface" menu of Siemens
programming software STEP7 can most support COM8, even though it can display above COM8,
in fact it can't use.
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