If you are using RoviSys Turbo to share a serial connection to a CIU between CIUMon and EWS software (such as Composer or WinCAD), you can avoid changing the EWS software settings with the following strategy:
A side benefit of this approach is that you can reconnect the CIU directly to the EWS simply by moving the cable back. If the computer does not have the extra serial ports you need for this approach, you can add serial ports with an internal interface card or a usb-to-serial converter.