Siemens SINAMICS S120 Function Manual page 312

Basic Information about the Drive System
Data sets
Using a power unit to operate, alternating, several motors, would be a typical EDS
changeover application. Contactors are changed-over so that the power unit can
be connected to the different motors. Each of the motors can be equipped with an
encoder or can also be operated without an encoder (sensorless operation). Every
encoder must be connected to its own SMx (also refer to the Chapter Motor
changeover in the Function Manual).
If encoder 1 (p0187) is changed over via DDS, then an MDS must also be changed
over.
One drive object can manage up to 16 encoder data sets. The number of encoder
data sets configured is specified in p0140.
When a drive data set is selected, the assigned encoder data sets are also
selected.
MDS: Motor Data Set
A motor data set contains various adjustable parameters describing the connected
motor for the purpose of configuring the drive (refer to Table 5-2). It also contains
certain visualization parameters with calculated data.
S Adjustable parameters, e.g.:
– Motor component number (p0131)
– Motor type selection (p0300)
– Rated motor data (p0304 ff)
– ...
S Visualization parameters, e.g.:
– Calculated rated data (p0330 ff)
– ...
The parameters that are grouped together in the motor data set are identified in
the SINAMICS parameter list by "Data Set MDS" and are assigned an index [0..n].
A separate motor data set is required for each motor that is controlled by the Con-
trol Unit via a Motor Module. The motor data set is assigned to a drive data set via
parameter p0186.
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© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition