Siemens SINAMICS S120 Function Manual page 774

Basic information about the drive system
14.1 Parameter
The CDS and DDS can be switched over during normal operation. Further types of data set also
exist, however these can only be activated indirectly by means of a DDS changeover.
● EDS (Encoder Data Set)
● MDS (motor data set)
Figure 14-2
Saving parameters in a non-volatile memory
The modified parameter values are stored in the volatile RAM. When the drive system is
switched off, this data is lost.
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Parameter categories
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions