Open the Comtrol Drivers Management Console, Start> Program Files> Comtrol> DeviceMaster > Comtrol Drivers Management Console
Highlight the appropriate DeviceMaster 500.
Highlight the first port you want to configure.
Select the appropriate communications mode.
If you select RS-422 mode, make sure that there is not a device attached to the port.
Enable the features that you want to use.
Optionally, click the RTS Toggle Options button:
If your communications application does not toggle RTS when transmitting in RS-485 mode.
If you are using an external RS-232 to RS-485 converter, which is attached to a port that is configured for RS-232.
Click the appropriate options for your environment.
Click OK to save the changes and return to the
Port General tab.
If desired, click the Clone check box to set all of the ports on
this DeviceMaster 500 to these characteristics.
Optionally, change the User-Friendly Port Name.
If desired, select a different COM Name (NS-Link COM port number).
The drop-down list displays (in use) next to COM port numbers that are already in use in this system.
Do not duplicate COM port numbers as this will cause the ports to not function.
Click Apply to save these changes.
Highlight the next port that you want to configure and perform Steps 3 through 10.
You are now ready to attach your serial device. If necessary, refer to the
DeviceMaster Installation and Configuration Guide.