Siemens SINAMICS G150 Operating Instructions Manual page 260

Operation
6.3 Basic information about the drive system
Parameter categories
The parameters for the individual drive objects (see "Drive objects") are categorized
according to data sets as follows (see "Operation/data sets"):
● Data-set-independent parameters
These parameters exist only once per drive object.
● Data-set-dependent parameters
These parameters can exist several times for each drive object and can be addressed via
the parameter index for reading and writing. A distinction is made between various types
of data set:
– CDS: Command data set
– DDS: Drive data set
– PDS: Powerstack Data Set
The CDS and DDS can be switched over during normal operation. Additional data record
types also exist, however these can only be activated indirectly by means of a DDS
changeover.
– EDS: encoder data set
– MDS: motor data set
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By parameterizing several command data sets and switching between them, the drive
can be operated with different pre-configured signal sources.
The drive data set contains the parameters for switching between different drive
control configurations.
The number of powerstack data sets corresponds to the number of power units
combined for units that are connected in parallel.
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A