Siemens SINAMICS S120 Function Manual page 486

Function modules
9.8 Basic positioner
The following table contains a few examples for data set changeover. The initial data set is
always DDS0.
Table 9-7 DDS changeover without load gear position tracking
DDS
p0186 (MDS)
p0187 (encoder 1)
p0188 (encoder 2)
p0189 (encoder 3)
p2502 (encoder for po‐
sition control)
Mechanical relation‐
ships p2504/p2505/
p2506/p2503
A, B and D designate
different mechanical re‐
lationships.
Load gear position
tracking
Changeover response
"Is newly initiated" means: For absolute encoders, the absolute value is read out again and for incremental encoders a
1)
restart is performed as after a POWER ON.
For incremental encoders r2684.11 ("Reference point set") is reset, and additionally for absolute encoders the status of
2)
adjustment (p2507).
For incremental encoders r2684.11 ("Reference point set") is reset, and for absolute encoders the status of adjustment
3)
(p2507) is not reset in addition, because the encoder data set is different from the original.
484
0 1
0 0
EDS0 EDS0
EDS1 EDS1
EDS2 EDS2
Encod‐ Encod‐
er_1 er_1
A A
Deactiva‐ Deactiva‐ Deactivated
ted ted
--- Change‐ Pulse inhibit:
over dur‐ Position actual
ing pulse value prepro‐
inhibit or cessing is new‐
opera‐ ly initiated
tion has referencing bit
no effect
Operation:
Fault is output.
Position actual
value prepro‐
cessing is new‐
ly initiated
referencing bit
2 3
0 0
EDS0 EDS0
EDS1 EDS1
EDS2 EDS2
Encoder_1 Encod‐
er_2
B A
Deactiva‐
ted
Position actual value preprocessing is newly
initiated
and
1)
Fault is output. Actual position value condi‐
2)
tioning newly set
is reset.
and
1)
2)
is reset.
4 5
0 1
EDS0 EDS4
EDS3 EDS1
EDS2 EDS2
Encod‐ Encod‐ Encod‐
er_2 er_1
A A
Deactiva‐ Deactiva‐ Deactiva‐
ted ted
Pulse inhibit:
and referencing bit is reset.
1) 3)
Operation:
and referencing bit
1)
set.
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
6 7
2 3
EDS5 EDS0
EDS6 EDS1
EDS7 EDS2
Encod‐
er_1 er_1
D A
Deactiva‐
ted ted
MDS
change‐
over
alone
during
pulse in‐
is re‐
3)
hibit or
opera‐
tion has
no effect
Drive functions