Siemens SINAMICS S120 Function Manual page 526

Function modules
8.8 Basic positioner
The following table contains a few examples for data set changeover. The initial data set is
always DDS0.
Table 8- 8 DDS changeover without load gear position tracking
DDS
p0186 (MDS)
p0187 (encoder 1)
p0188 (encoder 2)
p0189 (encoder 3)
p2502 (encoder for
position control)
Mechanical
relationships
p2504/p2505/p2506/
p2503
A, B and D designate
different mechanical
relationships.
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.
526
0 1
0 0
EDS0 EDS0
EDS1 EDS1
EDS2 EDS2
Encod- encod- encoder_1
er_1 er_1
A A
Deac- Deac- Deactivated
tivated tivated
--- Change- Pulse inhibit:
over Position actual
during value prepro-
pulse cessing is new-
inhibit or ly initiated
operation referencing bit
has no
effect
Operation:
Fault is output.
Position actual
value prepro-
cessing is
newly initiated
and referencing
bit
2 3
0 0
EDS0 EDS0
EDS1 EDS1
EDS2 EDS2
Encod-
er_2
B A
Deac-
tivated
Position actual value preprocessing is newly
initiated
1)
and
1)
Fault is output. Actual position value condi-
2)
tioning newly set
is reset.
1)
is reset.
2)
4 5
0 1
EDS0 EDS4 EDS5
EDS3 EDS1 EDS6
EDS2 EDS2 EDS7
Encod- Encod- Encod-
er_2 er_1 er_1
A A
Deac- Deac- Deac-
tivated tivated tivated
Pulse inhibit:
and referencing bit is reset.
3)
Operation:
and referencing bit
1)
reset.
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
6 7
2 3
EDS0
EDS1
EDS2
Encod-
er_1
D A
Deac-
tivated
MDS
changeo-
ver alone
during
pulse
inhibit or
is
3)
operation
has no
effect
Drive functions