HYDAC HDA 5500-3-2-DC-000 - Manual (Page 14)

HDA 5500 User Manual
- 14 -
Lo.1
Hi.1 plus 1%
Lo.1 minus 1%
P
t
Sicherheitszone
Sicherheitszone
Ein
Aus
Aus
Ein
Ein
Aus
Rückschaltwert
Schaltwert
Rückschaltwert
Schaltwert
Hi.1
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 fol-
lowing setting ranges apply:
• Switch point 1.5..100 % of the display range
• Hysteresis 0.5..99 % of the display range
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 1.0..99.5 % of the display range
• Lower switch point 0.5..99 % of the display range
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):
Sicherheitszone = safety zone
Rückschaltwert = switch-back value
Schaltwert = switching value
Ein = on
Aus = off