SOPA-...
12
Festo – SOPA-... – 2017-09b English
In: Distance
In: Supply pressure
Threshold value comparator
Out: Window comparator
Switching
element
function NO
(normally open
contact)
Switching
element
function NC
(normally
closed contact)
Tab. 4
Switching point (SP) and hysteresis (HY) of the binary signals
Hysteresis serves to suppress switching signals in the event of fluctuations around the switching point.
The reset points function as long as the value is within the hysteresis range.
–
Upper reset point = switching point + hysteresis
–
Lower reset point = switching point – hysteresis
1
2
3
4
1
Range in which switching signals are
suppressed in the event of fluctuations
around the switching point (SP)
2
Object
3
Sensing distance
4
Measuring nozzle
SP
Switching point
HY
Hysteresis
Fig. 6
Sensing range with switching points