IDEC SmartRelay functions
IDEC SmartRelay Manual 121
• Analog amplifier (actual value Ax, see Chapter 4.4.20)
and
• Up/down counter (actual value Cnt, see Chapter 4.4.13).
Select the required function by means of the block number.
The timebase is configurable. For information on valid time-
base ranges and parameter preset, refer to Chapter4.4.1.
Timing diagram
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 config-
ured 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 out-
put before T
a
has expired.
If retentivity is not set, output Q and the expired time are re-
set after a power failure.
Trg
T
T
Q
R
T
a
expires
The bold section of
the timing diagram
also appears in the
off-delay symbol.
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com
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