Chapter 5 238-2BC00 - Combination module Manual VIPA System 200V
5-34 HB97E - SM-AIO - Rev. 12/32
The hysteresis serves the avoidance of many toggle processes of the
output and the alarm, if the counter value is in the range of the comparison
value.
You may set a range of 0 to 255. The settings 0 and 1 deactivate the
hysteresis. The hysteresis also influences the over- and underflow.
An activated hysteresis remains active after a change. The new hysteresis
range is taken over at the next reach of the comparison value.
The view below shows the action of the at hysteresis 0 and 3
In the following illustration the behavior of the output is represented with
hysteresis 0 and hysteresis 3 for the appropriate conditions:
Action when Counter value
≥
Comparison value
8
7
6
5
4
3
2
1
0
Comparison
value
Hysteresis
Output:
Hysteresis = 0
Hysteresis = 3
Counter value
1
2
3
4
5 6
7
1
Counter value ≥ Comparison value → Output is set and hysteresis is activated
2
Leaving the hysteresis area → Output is reset
3
Counter value ≥ Comparison value → Output is set and hysteresis is activated
4
Leaving the hysteresis area, output is just set as Counter value ≥ Comparison value
5
Counter value < Comparison value an hysteresis not activated → Output is reset
6
Counter value ≥ Comparison value → Output is set and hysteresis is activated
7
Leaving the hysteresis area, output is just set as Counter value ≥ Comparison value
As reaching the comparison condition the hysteresis is activated. The
comparison result is as static as the counter value leaves the
parameterized hysteresis area. After leaving the hysteresis area only again
with reaching comparison condition the hysteresis is activated.
Hysteresis
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