Siemens SINUMERIK 840C - Manual (Page 492)

08.96 7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Encoder phase error compensation 1008
Default value Lower input limit Upper input limit Units
0.0 - 20.0 20.0 Degrees
Active
at once
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).
Configuration act. val. acquisition, motor measuring system 1011
Default value Lower input limit Upper input limit Units
0000 0000 FFFF Hex
Active on
Power On
Input of the configuration for actual value functions related to the SIMODRIVE System 611D.
Value table:
Bit 0 Adaptation of direction of rotation
gear encoder is fitted 0=Positive direction of rotation of
motor (clockwise)
1=Negative direction of rotation of
motor (counterclockwise)
Bit 1 Phase error compensation 0=not active
1=active
Bit 2 Reserved
Bit 3 Incremental encoder
Absolute encoder with Endat
interface =0
=1
Bit 4 Rotary measuring system
Linear measuring system =0
=1
Bit 5 Motor measuring system for AM
operation =0 available
=1 not available
Bit 6 Absolute track via electr. rev.
Absolute track via mec. rev. =1 (e.g. Hall-type pulse generator)
=0 (e.g. ERN 1387)
Bit 8 Linear scale has several zero marks:
One is selected by the NC =1
Bit 12 Identify rough position =1
Bit 13 Identify fine position =1
Bits 14-15 Transmission rate EnDat encoder 00= 100 kHz
01= 500 kHz
10=
10 kHz
11= 2 kHz
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 7–77
SINUMERIK 840C (IA)