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Function Blocks
MMA Min/Max/Avg Function Block
Revision 11
HC900 Hybrid Control Designer Function Block Reference Guide
213
2/07
−
if all inputs deviate more than the configured number (DEV) of standard deviations, then the MIN,
MAX, AVG, and SUM outputs all equal zero (0), and ALM turns ON.
•
Standard Deviation (SDEV) =
i = n
∑
i = 1
n
(X - X)
2
i
where:
X
= AVG
n = the number of connected inputs.
Input
X1
= First analog value.
X2
= Second analog value.
X3
= Third analog value.
X4
= Fourth analog value.
X5
= Fifth analog value.
X6
= Sixth analog value.
Output
MIN
= Calculated minimum analog value.
MAX
= Calculated maximum analog value.
AVG
= Calculated average of analog values.
SU
= Calculated sum of analog values.
SDEV
= Square root of Z divided by N, where Z = the sum of individual squared deviations from the
average of the first n inputs.
ALM
= Digital signal for alarm indication.
Block properties
Содержание HC900
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