Switching Mode; 1A) Switch Point And Hysteresis (Sp); 1B) Switching Window (Win) - Hydac HDA 5500-3-1-AC-000 Notice D'utilisation

HDA 5500

10.2.1 Switching mode

During normal operation, switch point and hysteresis or switching window can be set as the
switching mode of a switching output.
10.2.1.a) Switch point and hysteresis (SP)
In the switch point and hysteresis mode, a switching function is activated if (while rising in
value) the measured value of a sensor reaches the value of the switch point. A switching
function is deactivated if (when falling in value) the measured value of a sensor falls below
the value of the switch point by the value of the hysteresis. This defines the switch-back point
as the difference between switch point and hysteresis.
The switch point and hysteresis can be set individually for each switching output. The follow-
ing setting ranges apply:
•
Switch point
•
Hysteresis
10.2.1.b) Switching Window (Win)
In switching window a defined range is monitored. A switching function is activated if the
measured value of a sensor is outside the window and reaches one of the switch points. A
switching function is deactivated if the measured value of a sensor is within a switching
window and reaches one of the switch-back points. The switch-back points depend on the
switch points (upper switch-back point = upper switch point plus 1 % and lower switch-back
point = lower switch point minus 1 %). This difference between switch point and switch-back
point prevents unwanted switching from occurring.
The upper switch point and the lower switch point of a switching window can be individually
set for each switching output. The following setting ranges apply:
•
Upper switch point
•
Lower switch point
Important:
The switching window therefore only functions correctly (activation and deactivation of a
switching function), if all the switch points and switch-back points are larger than the lower
limit and smaller than the upper limit of the display range of a particular sensor.
Example for switching output 1 (relay activated):
P
Off
hi.1 plus 1%
hi.1
On
Lo.1
Lo.1 minus 1%
On
Off
1.5..100 % of the display range
0.5..99 % of the display range
2.25..99.0 % of the display range
1.50..98.2 % of the display range
Safety Zone
On
Safety Zone
Off
User Manual
Switch-back value
Switching value
Switching value
Switch-back value
t
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