Siemens SINUMERIK 840D Function Manual page 329

Property
Reference point offset
Supported referencing types
Adjustment status
Absolute position modulo range
Encoder serial no.
Transfer of series startup files
Activation time
Zero mark
Zero mark monitoring
Position after POWER ON without
actual value buffering
Position after POWER ON with ac‐
tual value buffering
Referenced after POWER ON
Requirement
The function can be used only with rotary absolute encoders:
● MD31000 $MA_ENC_IS_LINEAR == 0
● MD30240 $MA_ENC_TYPE == 4
Parameterization
Reference point approach with equivalent zero mark:
MD34200 $MA_ENC_REFP_MODE = 1
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Incremental encoder
MD34090 $MA_REFP_MOVE_DIST_CORR =
Value input allowed
MD34200 $MA_ENC_REFP_MODE =
1, 3, 4, 8
MD34210 $MA_ENC_REFP_STATE = 0, 1, 2
Automatic encoder misalignment during
shut down while in motion.
MD34220 $MA_ENC_ABS_TURNS_MODULO =
0
MD34230 $MA_ENC_SERIAL_NUMBER =
0
Without any restrictions.
0 seconds
1 per encoder revolution
Hardware
0.0
MD34210 = 0
Last standstill position before deactiva‐
tion.
MD34210 = 1
10.9 Referencing with absolute encoders
Value is updated exclusively via control
Automatic encoder misalignment during pa‐
rameter set change with position jump or dur‐
ing serial number change.
The value must be updated from the PLC
during each encoder change, otherwise loss
of adjustment plus alarm.
Due to encoder characteristics (MD30250,
MD30270, MD34090, MD34210, MD34220,
MD34230) only possible with certain restric‐
Last position within MD34220.
Last position including small movements dur‐
depends on adjustment status
R1: Referencing
Absolute encoder
0, 1
1 - 4096
tions.
several seconds
None
Software
MD30270 = 1
ing POWER OFF.
MD30270 = 0
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