IDEC SMARTRELAY User Manual page 234

IDEC SmartRelay functions
4.4 Special functions list - SF
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Analog comparator (Page 183) (actual value Ax – Ay)
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Analog trigger (Page 178) (actual value Ax)
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Analog amplifier (Page 191) (actual value Ax)
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Analog multiplexer (Page 209) (actual value AQ)
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Analog ramp control (Page 212) (actual value AQ)
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Analog Math (Page 224) (actual value AQ)
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PI controller (Page 216) (actual value AQ)
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Up/down counter (Page 168) (actual value Cnt)
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Analog filter (Page 229) (actual value AQ)
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Average value (Page 235) (actual value AQ)
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Max/Min (Page 231) (actual value AQ)
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On-delay (Page 132) (current time Ta)
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Off-delay (Page 136) (current time Ta)
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On-/off-delay (Page 138) (current time Ta)
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Retentive on-delay (Page 140) (current time Ta)
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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.
Parameters p (number of decimals)
Parameter p applies only to the display of the Ax value in a message text.
Functional description
The function reads the value of the signal at the analog input Ax.
This value is multiplied by the value of parameter A (gain). Parameter B (offset) is added to
the product, as follows:
(Ax • Gain) + Offset = Actual value Ax
The function block calculates the proportion of the actual value Ax to the range. The block
sets the digital output Q high for the same proportion of the T (periodic time) parameter, and
sets Q low for the remainder of the time period.
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IDEC SmartRelay Manual