HEIDENHAIN PWM 20 - Manual (Page 60)

November 2014 Software description 61
Synchronization
mode
Synchronization inactive:
Synchronization mode active:
Reversal of
counting
direction with
incremental
counting Example: 13-bit rotary encoder
If the encoder is rotated into the "minus" range, i.e, beyond the zero position, the absolute code
of the absolute track restarts with the highest position value (in the example: 8191), whereas the
incremental counter starts to count backwards, i.e. -1, -2 …
When the synchronization mode is activated, the incremental counter also starts with the
highest absolute value (in the example: 8191).
The absolute and the incremental positions are synchronized with each other at the
counting limits (zero crossover of absolute and incremental tracks).
Counting limit = Absolute value 'Zero' ( )
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