Tot Function Block - Honeywell UMC800 Reference Manual

2.72 TOT Function Block

Description
The TOT label stands for Totalizer. This block is part of the Calculations category. It looks like this
graphically on the Control Builder.
Function
Integrates an Analog variable using a specified rate. Rate may be in units per second, minute, hour, or day.
A preset is provided to reset the value when a specific quantity has been accumulated and provide a digital
status output.
Separate digital enable and reset inputs are provided.
Accumulated value may increment from 0 to preset for increasing totals or decrement from the preset to 0
for decreasing totals.
Inputs
RPRE = Remote Preset Value in Engineering Units
EN = When the enable input is ON, the input value is integrated to a preset value. (Value HOLD when EN
= OFF.)
RST = ON resets the output to zero. (Accumulated value set to 0.)
Output
PREI = Digital output, ON when the output = Preset Value. Upon reaching the preset value the digital
output is enabled for one scan and the totalizer restarts from 0.
OUT = Accumulated value in engineering units.
3/99 Function Block Reference Guide
Function Blocks
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