In one of our machines we have a Rexroth IMS 20 SSI v1 connected to S120 6SL3120-2TE21-0AA4  via SME125 6SL3055-0AA00-5KA3.

I want to replace the IMS for a new one but  I am not sure how to proceed in case the position value of the new IMS does not match the position value of the older one.

MaCorMa[snip]

How could I offset or the value or set another 0 value if the position values of the former IMS and the values of the new IMS are not the same?

Hello MaCorMa,

Welcome to forum. You should have open this post in SINUMERIK CNC automation systems product conference since it is related with NC system.

Now to your query, please set axis (of which you want to replace encoder) MD 34210 = 1, switch off power & after replacement of encoder, move axis to known position (i.e. at 0 position) in JOG mode, select JOG + REFERENCE mode & set/modify MD34210 from 1 to 2, the axis reference position will set to 0.

Before doing so, I suggest you to check parameter setting of topology comparison set, if it is high, system may display alarm when you replace encoder. For more detail information about topology comparison parameter setting, please refer Replacement of S120 componenets topic.

Hope this helps.