Trg
T has not expired
T
a
is expiring
Q
T
The bold section of the
timing diagram also
appears in the symbol
of the wiping relay.
IDEC SmartRelay functions
140
IDEC SmartRelay Manual
Timing diagram
Functional description
A 0 to 1 transition at input Trg sets the output, and triggers a
time T
a
during which the output remains set.
Output Q is reset to lo (pulse output) when T
a
reaches the
value preset at T (T
a
= T).
The output is immediately reset if there is a 1 to 0 transition
at input Trg before the specified time has expired.
If retentivity is not set, output Q and the expired time are
reset after a power failure.
4.4.6
Edge-triggered interval time-delay relay
Short description
An input pulse generates a preset number of output pulses
with a defined pulse/pause ratio (retriggerable), after a
configured delay time has expired.
Symbol in IDEC
SmartRelay
Wiring
Description
Input Trg
A signal at input Trg (Trigger) triggers
the times for the edge-triggered
interval time-delay relay.
Input R
A signal at input R resets the current
time (T
a
) and the output.
Parameter
The interpulse width T
L
and the pulse
width T
H
are configurable.
N determines the number of pulse/
pause cycles TL/TH:
Range of values: 1...9
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q
Q is set after TL has expired, and
reset after TH has expired.
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