Honeywell HC900 - TOT Totalizer Function Block

Function Blocks
TOT Totalizer Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 403
2/07
TOT Totalizer Function Block
Description
The TOT label stands for Totalizer.
This block is part of the
Calculations category.
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.