Function Blocks
3/99 Function Block Reference Guide 209
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.
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