Hi, Generally speaking, Masterdrives MC is replaced by Sinamics S120 (maybe even with Simotion, or more likely now with a T-CPU). This is all dependant on what technology level is implemented inside the drives.

If the masterdrives are on a common DC link, then sinamics S120 is really the ideal solution.

Masterdrives VC "should" be possible to replicate with Sinamics G if the application is not too dynamic.

I would highly recommend you contact your local Siemens Partner so they can suggest a Retrofit solution. The forum is not really the place for that.

Regards,

Graeme