Siemens SINAMICS S120 Function Manual page 485

Instructions for data set changeover
Using drive data set changeover (DDS), motor data sets (MDS, p0186) and encoder data
sets (EDS, p0187 to p0189) can be changed over. The following table shows when the
reference bit (r2684.11) or the status of the adjustment with absolute encoders (p2507) is
reset.
In the following cases, when a DDS changeover takes place, the actual position value
becomes invalid (p2521 = 0) and the reference point (r2684.11 = 0) is reset.
● The EDS that is effective for the position control changes.
● The encoder assignment changes (p2502).
● The mechanical relationships change (p2503...p2506)
With absolute encoders, the status of the adjustment (p2507) is also reset, if the same
absolute encoder is selected for the position control although the mechanical relationships
have changed (p2503 ... p2506).
In the operation state, a fault (F07494) is also output.
The following table contains a few examples for data set changeover. The initial data set is
always DDS0.
Table 8- 6 DDS changeover without load gear position tracking
DDS p0186 p0187
(MDS) (encoder_1)
0 0 EDS0
1 0 EDS0
2 0 EDS0
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
p0188 p0189
(encoder_2) (encoder_3)
EDS1 EDS2
EDS1 EDS2
EDS1 EDS2
Encoder Mechanical
for position conditions
4)
control
p2504/
p2502 p2505/
p2506 or
p2503
encoder_1 xxx
encoder_1 xxx
encoder_1 yyy
Function modules
8.8 Basic positioner
Load gear Changeover response
position
tracking
Deactivate ---
d
Deactivate Changeover during
d pulse inhibit or operation
has no effect
Deactivate Pulse inhibit: Actual
d position value
processing is newly
initiated and reference
1)
bit is reset.
2)
Operation:
Fault is output. Actual
position value
processing is newly
initiated and reference
1)
bit is reset.
2)
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