IDEC SMARTRELAY User Manual page 161

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Interval time-delay relay/Pulse output (Page 142) (current time Ta)
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Edge-triggered interval time-delay relay (Page 144) (current time Ta)
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Asynchronous pulse generator (Page 146) (current time Ta)
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Stairwell light switch (Page 150) (current time Ta)
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Dual-function switch (Page 152) (current time Ta)
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Stopwatch (Page 166) (actual value AQ)
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Frequency trigger (Page 175) (actual value Fre)
Select the required function by the block number. The timebase is configurable. For
information on valid ranges and parameter defaults, refer to the On-delay (Page 132) topic.
Timing diagram
Functional description
The 0 to 1 transition at input En triggers a random on-delay time between 0 s and T
output is set when the on-delay time expires and if the signal at input En remains hi at least
for the duration of this time.
The time is reset if input En is reset before the on-delay time has expired.
A 1 to 0 transition at input EN triggers a random off-delay time between 0 s and T
IDEC SmartRelay resets the output after the off-delay time expires, provided input En
remains lo at least for the duration of this time.
IDEC SmartRelay resets the time if the signal at input En changes to 1 again before the off-
delay time expires.
If the block is retentive, IDEC SmartRelay resets output Q and the expired time to the values
before a power failure; if the block is not retentive, IDEC SmartRelay resets output Q and the
expired time to defaults after a power failure.
IDEC SmartRelay Manual
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
IDEC SmartRelay functions
4.4 Special functions list - SF
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