IDEC SmartRelay functions
136 IDEC SmartRelay Manual
Functional description
Output Q is set to hi immediately when the input Trg changes
to hi.
The actual time T
a
in IDEC SmartRelay is retriggered at the
1 to 0 transition of Trg. The output remains set. Output Q is
reset to 0 with off-delay when T
a
reaches the value
configured at T (T
a
=T).
The time T
a
is retriggered with a one-shot at input Trg.
You can set input R (Reset) to reset the time T
a
and the
output before T
a
has expired.
If retentivity is not set, output Q and the expired time are
reset after a power failure.
4.4.3 On-/Off-delay
Short description
The on-/off-delay function sets the output after the set on-
dela
y time has expired, and resets it upon expiration of the
off-delay time.
Symbol in IDEC
SmartRelay
Wiring Description
Input Trg A positive edge (0 to 1 transition) at
input Trg (Trigger) triggers the on-
delay time T
H
.
A negative edge (1 to 0 transition) at
input Trg (Trigger) triggers the off-
delay time T
L
.
Parameter T
H
is the time after which the output
is set hi (output signal transition 0 to
1).
T
L
is the time after which the output is
reset ( output signal transition 1 to 0).
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q Q is set when the configured time T
H
has expired and Trg is still set. It is
reset on expiration of the time T
L
, if
the trigger Trg has not been set
again.
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