Vega VEGAPOINT 21 - Page 26

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7 Setup
VEGAPOINT 21 • Transistor (NPN/PNP)
56623-EN-210210
SP
t
RP
off
on
off
on
1
A
B
Fig. 13: Hysteresis function
SP Switching point
RP Reset point
A HNO (Hysterese Normally Open) = Closing contact
B HNC (Hysterese Normally Closed) = Opener
t Timeline
1 Hysteresis
Window function (FNO/FNC)
With the window function (FNO and FNC) a nominal range, a so-
calledwindow,canbedened.
The output changes its state when the measured variable enters the
window between the values Window High (FH) and Window Low (FL).
If the measured variable leaves the window, the output returns to its
previous state. If the measured variable moves within the window, the
state of the output does not change.