Honeywell HC900 - Relay Output

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