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Function Blocks

Function Block Reference Guide 3/99102

2.37 MMA Function Block

Description

The

MMA

label stands for

Min-Max-Average-Sum

. This block is part of the

Calculations

category. It

looks like this graphically on the Control Builder.

Function

Accepts inputs from up to six analog input values (Xl - X6) and calculates these values for output:

• MIN - Minimum input value

• MAX - Maximum input value

• AVG - Average of the 6 input values

• SUM - Sum of the 6 input values

• DEV - Standard deviation of the 6 input values

• ALM - Alarm output for deviations

Turns ON ALM when any input is outside the configured number of standard deviations when the

configuration parameter DEV > 0.

• If DEV configured = 0, then:

– no standard deviation is calculated;

– all inputs connected to the block are used to calculate the MIN, MAX, AVG,

AND SUM outputs.

•

If DEV configured 0, then:

– the standard deviation is calculated for the number of inputs connected to the

block, and

– all inputs connected to the block are used to calculate the MIN, MAX, AVG,

and SUM outputs

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Honeywell UMC800 Reference Guide

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