Dewp Function Block; Table 5-23 Dewp Dynamic Parameters; Table 5-24 Dewp Static Configuration Parameters - Honeywell UMC800 Reference Manual

Function Parameter Index Reference

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:
Parameter
status
DEWPT
%C
SPHLIM
WRLIM
LOTEMP
O2
TEMP
%CO
Static Configuration Parameters:
Parameter
L%CO
REM_CO
FURNACE_FACTOR
ANTI_SOOT
TEMP_LO_LIM
PERCENT_H
58

Table 5-23 DEWP Dynamic Parameters

Index Type Use
0 REAL C
1 REAL O
2 REAL O
3 REAL O
4 BOOL O
5 BOOL O
6 REAL I
7 REAL I
8 REAL I

Table 5-24 DEWP Static Configuration Parameters

Index Type Description
0 REAL Local percent carbon monoxide (2.0 to 35.0, default 20.0)
1 BOOL Use %CO input instead of local L%CO (default = OFF)
2 REAL Furnace Factor in %C (-0.5 to 0.5)
3 BOOL Anti-soot SP limit enable
5 REAL
Trigger value for LOTEMP Boolean output (0 to 2500°F)
7 REAL Percent hydrogen (1 to 100, default = 40)
RS232 Communications Reference Manual
R/W Description
R block status (see section 5.2 for code list)
R Calculated dew point output.
R Calculated percent carbon output.
R Control set point high limit for anti-soot
R Command to write the set point high limit.
R ON when TEMP is <= calculated low
temperature dropoff.
R Oxygen sensor input (0 to 100%)
Temperature input (°F or °C per
R
USE_METRIC)
R Percent carbon monoxide input
8/99