BECKHOFF CX2500­0031 - Manual (Page 18)

Mounting and wiring
The order of the system interfaces in the operation system is counted from right to left (CPU view) and up to
down (X311 ­> COM n and X310 ­> COM n + 1 for n={3, 5, 7, 9} ).
If the configuration of the system interfaces is changed the order in the operation system. For a proper order
of the system interfaces is a good advice to remove the interfaces manually in the device manager.
To remove the driver open the context menu by pressing the right mouse button and select "uninstall"
In the following dialog it is very important to leave the driver in the system folders. To do so do NOT select
the box in the dialog.
If all serial interfaces are removed in the device manager (except COM1) the system must be shut down.
Disconnect the power supply to perform a cold start later.
CX2500­0031 18 Version 1.1