IFM Electronic efector 500 PY993 Serie Notice Utilisateurs page 24

Setting of the display
7 options can be selected:
d1
d2
d3
The update interval only refers to the display. It has no effect on
the output.
rd1, rd2, rd3, = display as d1, d2, d3; but rotated 180°.
OFF = In the Run mode the display of the measured value is
deactivated. If one of the buttons is pressed, the current
measured value is displayed for 15 s. Another press of the
Mode/Enter button opens the Display mode.
The LEDs remain active even if the display is deactivated.
Hysteresis function (fig. 1):
The hysteresis keeps the switching state of the output stable if the system
pressure varies about the preset value. With the system pressure rising, the
output switches when the switch-on point has been reached (SPx). With the
system pressure falling the output does not switch back until the switch-off
point (rPx) has been reached.
The hysteresis can be adjusted: First the switch-on point is set, then the
switch-off point with the requested distance.
Window function (fig. 2):
The window function enables the monitoring of a defined acceptable range.
When the system pressure varies between the switch-on point (SPx) and the
switch-off point (rPx), the output is switched (window function / NO) or not
switched (window function / NC).
The width of the window can be set by means of the difference between SPx
and rPx. SPx = upper value, rPx = lower value.
P
SP
rP
1
0
1
0
24
= update of the measured value every 50 ms.
= update of the measured value every 200 ms.
= update of the measured value every 600 ms.
hysteresis
t
Hno
Hnc
1
acceptable range
2
Fno
Fnc