Siemens SINUMERIK 840C Installation Instructions Manual page 492

08.96
1008
With this machine data, a phase error compensation is performed. On unconditioned signal
encoders (e.g. ERN 1387), phase errors can occur between the A and B tracks. These can be
noticed by a rougher speed actual value, i.e. the actual value has twice the encoder marking
frequency imposed on it if a fault occurs. Especially in the case of geared encoders, the phase
errors can assume magnitude that have an effect on the control quality. (Acoustic)
Note:
This machine data is switched active with bit 1 of the machine data Configuration act. val.
acquisition (MD 1011).
1011
Input of the configuration for actual value functions related to the SIMODRIVE System 611D.
Value table:
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 8
Bit 12
Bit 13
Bits 14-15
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SINUMERIK 840C (IA)
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Encoder phase error compensation
Default value Lower input limit
0.0 - 20.0
Configuration act. val. acquisition, motor measuring system
Default value Lower input limit
0000 0000
Adaptation of direction of rotation
gear encoder is fitted
Phase error compensation
Reserved
Incremental encoder
Absolute encoder with Endat
interface
Rotary measuring system
Linear measuring system
Motor measuring system for AM
operation
Absolute track via electr. rev.
Absolute track via mec. rev.
Linear scale has several zero marks:
One is selected by the NC
Identify rough position
Identify fine position
Transmission rate EnDat encoder
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7 Drive Machine Data (SIMODRIVE Drive MD)
Upper input limit
20.0
Upper input limit
FFFF
0=Positive direction of rotation of
motor (clockwise)
1=Negative direction of rotation of
motor (counterclockwise)
0=not active
1=active
=0
=1
=0
=1
=0 available
=1 not available
=1 (e.g. Hall-type pulse generator)
=0 (e.g. ERN 1387)
=1
=1
=1
00= 100 kHz
01= 500 kHz
10= 10 kHz
11= 2 kHz
6FC5197- AA50
7.3.2 Drive MD (data description)
Active
at once
Units
Degrees
Active on
Power On
Units
Hex
7–77