HEIDENHAIN MANUALplus 620 Technical Manual page 666

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The interpolator calculates the absolute position when a reference mark of a
distance-coded encoder is crossed over. If MP_checkAbsolutPos is active,
the nominal values are compared to the actual values. If deviations are found,
an error message is displayed and an EMERGENCY STOP is initiated.
MP_checkAbsolutPos
Monitoring the absolute position with distance-coded encoder
Available from NCK software version: 597 110-01.
Format: Selection menu
Selection: on
Monitor the absolute position
off
No monitoring
Default: off
Access: LEVEL3
Reaction: RESET
MP_checkSignalLevel
Monitoring the amplitude of the position-encoder signal
Available from NCK software version: 597 110-01.
Format: Selection menu
Selection: on
Monitor the encoder amplitude
off
No monitoring
Default: on
Access: LEVEL3
Reaction: RUN
MP_checkFrequency
Monitoring the edge separation of the position encoder
Available from NCK software version: 597 110-01.
Format: Selection menu
Selection: on
Monitor the encoder frequency
off
No monitoring
Default: off
Access: LEVEL3
Reaction: RUN
Criterion
Absolute position with distance-
coded reference marks
Amplitude of encoder signals
Edge separation of encoder
signals
Error message
Encoder <AXIS> DEFECTIVE
Encoder AMPLITUDE TOO LOW <AXIS>
Encoder <AXIS>: FREQUENCY TOO HIGH
HEIDENHAIN Technical Manual MANUALplus 620