Technical data

Chapter 9 SM 238C - Combination module Manual VIPA System 200V
9-36 HB97E - SM - Rev. 09/19
Action at pulse at comparison value and Pulse width not equal to zero
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 → Hysteresis is switched active, a pulse of the specified
length is output and the counting direction is stored
2
Leaving the hysteresis area against the stored counter direction → A pulse of the specified length
is output and the hysteresis deactivated
3
Counter value = Comparison value → Hysteresis is switched active, a pulse of the specified
length is output and the counting direction is stored
4
Leaving Hysteresis area without changing counting direction → Hysteresis is deactivated
5
Counter value = Comparison value → Hysteresis is switched active, a pulse of the specified
length is output and the counting direction is stored
6
Counter value = Comparison value and hysteresis is activated → no pulse
7
Leaving the hysteresis area against the stored counting direction → A pulse of the specified
length is output and the hysteresis deactivated
As reaching the comparison condition the hysteresis is activated and a
pulse of the specified length is output. As long as the counter value is
within the hysteresis area no further pulse is output. With hysteresis
activation the counting direction is stored by the PLC. If the counter value
leaves the hysteresis area against
the stored counting direction, an impulse
of the of the specified length is output. When leaving the hysteresis area
without change of counter direction there is no pulse output.