Menu Navigation
Programming mode
Programming mode (see the menu structure) allows the switching thresholds and
switching functions to be set.
Example: Changing the switching threshold
The switching threshold to be changed is selected with SELECT (see the menu struc-
ture). The currently selected menu item is indicated at the bottom of the display: I, II,
Low, High, Fct. The arrows point to the corresponding designations. E.g.: if the arrows
point to I and High --> the high switching threshold of switch output 1 can be changed.
This value is then released for change by pressing ENTER (flashing arrow). The value
is decreased with SELECT and increased with ENTER. If no button is pressed for about
5 seconds, the programming device saves the value displayed to the pressure switch
(the arrows stop flashing).
Switching functions (Fct.)
Various functions can be configured for the switch outputs.
Hysteresis (H):
When the high switching threshold is exceeded, the output
closes. It only opens again when the value goes below the low
switching threshold. Application example: 2-point controller.
Window (F):
The switch output is closed between the low and high swit-
ching thresholds. Outside this range it is open. Application
example: Alarm when the pressure is outside a defined range.
Normally Open (no): The switch contact is normally open.
Normally Closed (nc): The switch contact is normally closed (inverse of NO)
Off (OFF):
The switch contact is always open
To change the corresponding
switching function, press ENTER
in the programming mode re-
peatedly until the required
function is displayed. Press
SELECT to go to the next menu
item: this simultaneously saves
the displayed switching function
to the pressure switch.
P/bar
P/bar
High
NO
NC
NC
t
t
1
0
1
0
0
1
0
1
Low
High
Low
NO
window function
hysteresis function
Programmer dV-22 PP - 9 -
