Manual - TC.P Quadro
Control
2016-08-05
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V04.52
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3.3.7.
Versatile Limit Switch (VLS)
3.3.7.1. Description of VLS function
With the aid of the VLS (Versatile Limit Switch) one of the following ac-
tual DC output values can be monitored:
Voltage
Current
Power
If programmed limit values are not respected, an output relay is
switched.
You can select the type of relay that is operated via the interface X105:
“Warn” relay (normally open)
“Run” relay (normally open)
“OK/Alarm” relay (normally closed/normally open)
For further information see chapter 3.3.3.6, page 77.
The following VLS functions can be selected:
Exceeding a threshold
Dropping below a threshold
Entering a window
Defined value range is reached
Leaving window
Defined value range is left
Each threshold can also be assigned a hysteresis range above or below
a threshold value.
A value of zero will deactivate the hysteresis.
Programmable switching delays help to suppress brief irrelevant transi-
ents (settling processes, pulses).
Due to the cyclical digital sampling, rapid changes (duration < 50
μs) on
the signals monitored may not be detected in some circumstances.