Honeywell UDC3500 Product Manual page 91

Function Prompt
Lower Display
ALG1BIAS
ATTENTION
• All Input Algorithms operate in engineering units except Feed-forward which operates in percent of
range units.
• For General Math functions, when Input C is disabled, the value of Input C used in the functions is
automatically set to 1.0.
INP ALG2
MATH K2
CALC HI
CALC LO
10/05
Selections or
Range of Setting
Upper Display
-999 to 9999 floating (in
engineering units)
NONE
W AVG
F FWR2
FFWDM2
A-B/C
HI SEL
LO SEL
√MuDIV
√MULT
MuDIV
MULT
DEW PT
0.001 to 1000 floating
–999. To 9999. Floating
(in engineering units)
–999. To 9999. Floating
(in engineering units)
UDC3500 Universal Digital Controller Product Manual
Parameter
Definition
INPUT ALGORITHM 1 BIAS—Does not apply to
selections: FFWRD, FFWDMU, HISEL or LOSEL.
INPUT ALGORITHM 2—The formulas for these
selections are the same as those for IN ALG 1 with
the following exceptions: Relative Humidity, all
Carbon Potential and Oxygen algorithms are not
available. Feedforward works only on Loop 2.
ATTENTION Selection A–B/C algorithm is used in
place of IN ALG1 A+B+C algorithm. The A-B/C
algorithm subtracts Input B with Ratio/Bias from
Input A with Ratio/Bias and divides the result by
Input C with Ratio/Bias using engineering units. This
selection is only available on Input Algorithm 2.
EXAMPLE:
(A–B)
PV or SP = K (Calc Hi – Calc Lo)
C
WEIGHTED AVERAGE RATIO OR MASS FLOW
ORIFICE CONSTANT (K) FOR MATH
SELECTIONS—Only applicable for algorithm
W AVG or General Math selections MuDIV, MULT,
MuDIV, or MULT.
CALCULATED VARIABLE HIGH SCALING
FACTOR FOR INPUT ALGORITHM 2—Does not
apply to Feedforward algorithms. Range is used for
either PV or RSP, depending upon Algorithm
application.
CALCULATED VARIABLE LOW SCALING
FACTOR FOR INPUT ALGORITHM 2—Does not
apply to Feedforward algorithms. Range is used for
either PV or RSP, depending upon Algorithm
application.
Configuration
77