Function Parameter Index Reference
58 RS232 Communications Reference Manual 8/99
5.18 DEWP Function Block
Description
The DEWP label stands for Dewpoint Calculation. This block is part of the Calculations category. It
looks like this graphically on the Control builder.
Dynamic Parameters:
Table 5-23 DEWP Dynamic Parameters
Parameter Index Type Use R/W Description
status 0 REAL C R block status (see section 5.2 for code list)
DEWPT 1 REAL O R Calculated dew point output.
%C 2 REAL O R Calculated percent carbon output.
SPHLIM 3 REAL O R Control set point high limit for anti-soot
WRLIM 4 BOOL O R Command to write the set point high limit.
LOTEMP 5 BOOL O R ON when TEMP is <= calculated low
temperature dropoff.
O2 6 REAL I R Oxygen sensor input (0 to 100%)
TEMP 7 REAL I R
Temperature input (
°
F or
°
C per
USE_METRIC)
%CO 8 REAL I R Percent carbon monoxide input
Static Configuration Parameters:
Table 5-24 DEWP Static Configuration Parameters
Parameter Index Type Description
L%CO 0 REAL Local percent carbon monoxide (2.0 to 35.0, default 20.0)
REM_CO 1 BOOL Use %CO input instead of local L%CO (default = OFF)
FURNACE_FACTOR 2 REAL Furnace Factor in %C (-0.5 to 0.5)
ANTI_SOOT 3 BOOL Anti-soot SP limit enable
TEMP_LO_LIM 5 REAL
Trigger value for LOTEMP Boolean output (0 to 2500°F)
PERCENT_H 7 REAL Percent hydrogen (1 to 100, default = 40)
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