IDEC SmartRelay functions
138
IDEC SmartRelay Manual
4.4.4
Retentive on-delay
Short description
A one-shot at the input triggers a configurable on-delay time.
The output is set when this time has expired.
Parameter T
Note the defaults specified 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 configurable. For information on valid ranges
and parameter defaults, refer to Chapter 4.4.1.
Trg
T
T
a
expires
Q
R
T
The bold section of the timing diagram is also shown in the symbol
of the retentive on-delay.
Timing diagram
Symbol in IDEC
SmartRelay
Wiring
Description
Input Trg
A signal at input Trg (Trigger) triggers
the on-delay timer.
Input R
A signal at input R resets the on-
delay time and the output.
Parameter
T represents the on-delay time for the
output (output status transition 0 to
1).
Retentivity:
/ = no retentivity
R = The status is retentive.
Output Q
Q is set after the time T has expired.
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