Siemens LOGO!, Manual

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LOGO! functions
4.4 Special functions list - SF
LOGO!
276
Manual, 04/2011, A5E03556174-01
4.4.36 Average value (0BA7 only)
Short description
The average value function calculates the average value of an analog input over a
configured time period.
Symbol in LOGO! Wiring Description
En A change in status from 0 to 1 transition at input En
starts the average value function.
A change in status from 1 to 0 at input En holds the
analog output value.
R A signal at input R clears the analog output value.
Ax Input Ax is one of the following analog signals:
•
AI1 to AI8 (*)
• AM1 to AM16
•
NAI1 to NAI32
• AQ1 to AQ2
•
NAQ1 to NAQ16
• Block number of a function with analog output
Parameter St (Sampling time): You can set the timebase to s
(seconds), d (days), h (hours), or m (minutes).
Range of values:
St = s: 1 to 59
St = d: 1 to 365
St = h: 1 to 23
St = m: 1 to 59
Sn (Number of samples):
Range of values:
St = s: 1 to St*100
St = d: 1 to 32767
St = h: 1 to 32767
St = m and St ≤ 5 minutes: 1 to St*6000
St = m and St ≥ 6 minutes: 1 to 32767
Retentivity:
/ = No retentivity
R = Retentivity
$4
$[
(Q
5
$[
3DU
Output AQ Outputs the average value of input Ax over
configured time sampling period.
* AI1...AI8: 0...10 V corresponds with 0...1000 (internal value).