Siemens SINAMICS S120 Function Manual page 212

Basic information about the drive system
Data sets
MDS: motor data set
A motor data set contains various adjustable parameters describing the connected
motor for the purpose of configuring the drive. 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.
Motor data sets can only be switched when a DDS is switched.
The motor data set switchover is used in the following cases, for example:
S Switching over different motors
S Switching over different windings in a motor (e.g. star-delta switchover)
S Adapting the motor data
If several motors are operated alternately on a Motor Module, a matching number
of drive data sets must be created. For more information on the motor switchover,
see Section 4.9.
Notice
Only one motor on a Motor Module can have an encoder; all the other motors
must run without encoders.
One drive object can manage up to 16 motor data sets. The number of motor data
sets in p0130 must not exceed the number of drive data sets in p0180.
For 611U interface mode (p2038 = 1), the drive data sets are divided into groups of
eight (1--8; 8--16;...). Within a group, the assignment to the
motor data set must be the same:
p0186[0] = p0186[1] = ... = p0186[7]
p0186[8] = p0186[9] = ... = p0186[15]
p0186[16] = p0186[17] = ... = p0186[23]
p0186[24] = p0186[25] = ... = p0186[31]
If this is not the case, alarm A07514 is output.
If you need a precise representation of the data set structure of the 611U, 32 drive
data sets and 4 motor data sets must be configured.
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© Siemens AG, 2005. All rights reserved
SINAMICS S120 Function Manual, 06/05 Edition