Encoder Monitoring - Baumuller b maXX BM3000 Operating Manual

Description of the Software Modules and Parameters

4.4.6.1 Encoder monitoring

Monitoring of signal amplitude Sin² + Cos²
The controller evaluates the present total amplitude from the sine and cosine traces of the
encoder (Am in
and cosine measuring values is nearly constant. However the signal level is not always
constant, in particular there is a dependence of the angle speed and consequently from
the speed.
The levels for the monitoring of the sin² +cos² value can be set in the parameter
and Z14.2–.
Figure 80:
Sector monitoring
The sector sequence at the sampling of the encoder traces (sine or cosine signal) is an-
alyzed at this monitoring. Here it is assumed that the sampling rate is at least 4 times the
signal frequency and therefore each quadrant of a signal period is at least sampled once.
Monitoring of square-wave incremental encoder
The levels of the encoder signal are monitored separately at a square-wave incremental
encoder, because a monitoring of the amplitude using sin² +cos² is only restricted possi-
ble. The zero trace (zero pulse) is not monitored.
ZFig.
80–). At error free operation the sum of the quadrants of the sine
Sine/Cosine traces and instantaneous amplitude of the encoder signal
Parameter manual b maXX BM3000
Document no.: 5.12001.07
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Z14.1–
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