33
7 Set up with the integrated display and adjustment unit
VEGABAR 39 • Three-wire 1 x transistor or 4 … 20 mA
57536-EN-200831
Menu item code:
•
OU1
Parameter:
•
HNO
•
HNC
•
FNO
•
FNC
•
4 … 20 mA
In this menu item the switching and reset delay times for the outputs
are set.
Hysteresis function
If the measured variable has reached the set switching point (SP),
the state of the output does not change until the set delay time has
elapsed. If the measured variable falls below the switching point again
after this time has elapsed, the state of the output does not change.
If the measured variable has dropped to the reset point (RP) or below
for the duration of the reset delay time, the output switches back to its
previous state.
SP
RP
1
0
1
DS
DR
0
HNC
HNO
Fig. 24: Effect of the delay time on the output with hysteresis function
Window function
If the measured variable has reached the lower value of the window
(FL), the state of the output does not change until this time has
elapsed when the delay time has been set. If the measured value falls
below the lower value of the window again after this time has elapsed,
the state of the output does not change.
Switching delay times
