a positive and negative effective direction. A position-based cam can be output repeatedly on
changing the direction of movement. Time-based cams are output once only.
4.2.3.3
Hysteresis
If the actual position value tends to fluctuate due to mechanical influences, specification of a
hysteresis prevents the output cam from unintended switch status changes.
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Figure 4-10 Hysteresis
Conditions for the hysteresis range
● Hysteresis is not activated until the direction has been reversed.
● The direction of motion is not redefined within the hysteresis.
● Within the hysteresis, the switching state of position-based cams is not changed.
● If modified switching conditions for the output cam are detected when the output cam is
outside the hysteresis range, this current switching state is set.
Example: position-based cam hysteresis
Cam track configuration (only one output cam configured):
Output cam type: position-based cam; switch-on position, 20 mm; switch-off position, 200 mm;
hysteresis, 20 mm; effective direction: both
Axis positions:
0 mm -> 100 mm -> 10 mm -> 50 mm -> 0 mm -> 150 mm -> 0 mm
Cam Track TO - Part II
4.2 TO Cam Track basics
Output Cams and Measuring Inputs
Function Manual, 04/2014
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