IDEC SmartRelay functions
IDEC SmartRelay Manual 139
Functional description
The 0 to 1 signal transition at input Trg triggers the current
time T
a
. Output Q is set when T
a
= T. A further signal at input
Trg does not influence the time T
a
.
The output and the time T
a
are reset with the next 1 signal at
input R.
If retentivity is not set, output Q and the expired time are
reset a
fter a power failure.
4.4.5 Interval time-delay relay/Pulse output
Short description
An input pulse generates a signal with a configurable period
at the outp
ut.
Parameter T
Note the information on parameter T in Chapter 4.3.2.
The time for parameter T can be provided by the actual value
of another
already-programmed function. You can use the
actual values of the following functions:
• Analog comparator (actual value Ax - Ay, see Chapter
4.4.18)
• Analog trigger (actual value Ax, see Chapter 4.4.16)
• Analog amplifier (actual value Ax, see Chapter 4.4.20)
• Analog multiplexer (actual value AQ, see Chapter 4.4.26)
• Analog ramp control (actual value AQ, see Chapter
4.4.27)
• Analog math (actual value AQ, see Chapter 4.4.30)
• PI controller (actual value AQ, see Chapter 4.4.28)
• Up/down counter (actual value Cnt, see Chapter 4.4.13)
Select the required function by the block number. The
timebase is con
figurable. For information on valid ranges
and parameter defaults, refer to Chapter 4.4.1.
Symbol in IDEC
SmartRelay
Wiring Description
Input Trg A signal at input Trg (Trigger) triggers
the time for the wiping relay function.
Parameter The output is switched off after the
time T has expired (output signal tran-
sition 1 to 0).
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q A signal at input Trg sets Q. If the input
signal = 1, output Q remains set for the
time Ta.
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