Manual

Manual – TopCon TC.GSS
Analogue interface
Versatile Limit Switch (VLS)
Switching behaviour – time dimension
Relais
Output
current
Threshold = 20
1
2
Closed
Open
Fig. 66 Explanation of the VLS example (time dimension)
Along with the consideration of the dimension stated above, parameters
can be set for the behaviour over time. The switching behaviour for the
selected relay is also defined by various (timers) counters that evaluate
the VLS state of the TC.GSS power supply.
The following explanatory example from Fig. 66 assumes the active-toinactive
delay = 20 ms the hysteresis set = 0 V.
The current curve exceeds the threshold -1-, as a consequence it is in
the active range. The active counter now counts up, as per the limit value
set, (“inactive-to-active delay”) -2-.
In this example the current drops back below the (lower) hysteresis
threshold -3-. From this point in time the counter counts down -4-. From
point -5- the monitored current increases again over the upper hysteresis
value and the counter counts up again -6-.
Once the counter has reached the limit value set (as per the delay parameter)
-7-, the required relay is closed or opened depending on the
configuration -8-.
This process is setup similarly for the opposite direction using the
“active-to-inactive delay” counter.
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