IDEC SmartRelay Manual
179
IDEC SmartRelay functions
4.4 Special functions list - SF
• On-delay (Page 132) (current time Ta)
• Off-delay (Page 136) (current time Ta)
• On-/off-delay (Page 138) (current time Ta)
• Retentive on-delay (Page 140) (current time Ta)
• Interval time-delay relay/Pulse output (Page 142) (current time Ta)
• Edge-triggered interval time-delay relay (Page 144) (current time Ta)
• Asynchronous pulse generator (Page 146) (current time Ta)
• Stairwell light switch (Page 150) (current time Ta)
• Dual-function switch (Page 152) (current time Ta)
• Stopwatch (Page 166) (actual value AQ)
• Analog trigger (Page 178) (actual value Ax)
• Frequency trigger (Page 175) (actual value Fre)
Select the required function by the block number.
Parameter p (number of decimals)
Applies only to the display of On, Off and Ax values in a message text.
Does not apply to the comparison of On and Off values. (The compare function ignores the
decimal point.)
Timing diagram
Functional description
The function fetches the analog signal at input Ax.
Ax is multiplied by the value of the A (gain) parameter, and the value at parameter B (offset) is
added to product, i.e. (Ax • gain) + offset = actual value of Ax.
Output Q is set or reset, depending on the set thresholds. See the calculation rule below.
$[
4
2II
2Q
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