Im trying to troubleshoot a simodrive 611 with Hiedenhain DDC2 optical drive controllers. I want to swap the DDC2 modules to see if the error (x53) follows to another axis. I searched both machine forums and the Siemens site and seems like no one has ever done this type of test. Has anyone ever tried this and if so what is the procedure? The drive is in a 2000 DMU50V with Millplus control.