The easiest way to change the module ID is to open the tool "Global Parameters" in the left-hand tree of the TMCL-IDE. In this window, all global parameters of the module are displayed, like the ID of the module (GP 66 for RS232/RS485 and GP 74 for CAN).
Here the value of the ID can be changed. CAUTION: The change takes effect immediately!
The connection in the TMCL-IDE needs to be closed and re-connected with the new ID (except if the module is connected via USB, where the ID is ignored).