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Function Blocks
DEWP Function Block
Revision 11
HC900 Hybrid Control Designer Function Block Reference Guide
133
2/07
DEWP Function Block
Description
The
DEWP
label stands for
Dewpoint
Calculation.
This block is part of the
Calculations
category.
Function
Monitors Dewpoint or Carbon Potential, or uses a Zirconia Probe sensor input to supply a Dewpoint PV to
a PID function block for Dewpoint control. Use in conjunction with other blocks including a PID to
generate more elaborate control strategies than that provided by the Carbon potential (CARB) function
block.
Inputs
Probe
= Oxygen Sensor Input from AI (0-2 mV)
TEMP
= Temperature Input (°F or °C) from AI Input
%CO
= Percent Carbon Monoxide Input 1 - 100 %
Outputs
DEWPT
= Calculated Dewpoint Output
%C
= Calculated Percent Carbon Output
SPHLIM
= Control Setpoint High Limit for Anti-soot.
WRLIM
= Command to write the setpoint high limit.
LOTEMP
= ON when TEMP is <= calculated low temperature dropoff.
Содержание HC900
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