Rievtech EXM-12DC-DA-R-HMI, User Manual, Page: 225 / 443

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Description of the function
Output Q is set to 1 momentarily with a 0 to 1 transition at input Trg.
At the 1 to 0 transition at input Trg, x-Messenger retriggers the current time T, and the output remains set.
The output Q is reset to 0 when T
a
reaches the value specified in T (T
a
=T) (off delay).
A one-shot at input Trg retriggers the time Ta.
You can reset the time Ta and the output via the input R (Reset) before the time Ta has expired.
If retentivity is not set, output Q and the expired time are reset after a power failure.
6.5.3 On-/Off-delay
Short description
The on/off delay function is used to set an output after a configured on delay time and then reset it again upon
expiration of a second configured time.
Connection Description
Input Trg You trigger the on delay with a positive edge (0 to 1
transition) at input Trg (Trigger).
You trigger the off delay with a negative edge (1 to 0
transition).
Parameter T
H
is the on delay time for the output (output signal transition
0 to 1).
T
L
is the off delay time for the output (output signal transition
1 to 0).
Retentivity on = the status is retentive in memory.
Output Q Q is switched on upon expiration of a configured time T
H
if Trg
is still set. It is switched off again upon expiration of the time
T
L
and if Trg has not been set again.
Parameter