Honeywell UDC2800 - Page 103

Function Prompt
Selections or Range of
Setting
Parameter Definition
Low Select
(See Note 2)
Input Low Select with Ratio and
Bias — This selection specifies the
PV or SP as the lower of Input 1 or
Input 2. The following formula
applies:
Alg1 = lower of (Input A x Ratio A +
Bias A) or (Input B x Ratio B + Bias
B)
Multi Div + Sqrt
(See Note 1)
Multiplier Divider with Square Root
—The following formula applies:
Alg1 = K * Sq.Rt. {(Input A x Ratio A +
Bias A) x (Input C x Ratio C + Bias C)
/ (Input B * Ratio B + Bias B)} x (Calc
Hi – Calc Lo) + Alg1Bias
See the figure at the end of this
section for an example of Mass Flow
Compensation using the
Multiplier/Divider Algorithm.
Multiplier + Sqrt
(See Note 1)
Multiplier with Square Root —The
following formula applies:
Alg1 =K x Sq.Rt.{(Input A x Ratio A +
Bias A) x (Input B x Ratio B + Bias B)
x (Input C x Ratio C + Bias C)} x
(Calc Hi – Calc Lo) + Alg1Bias
Multiplier Divider
(See Note 1)
Multiplier Divider — The following
formula applies:
Alg1 = K x [{(Input A x Ratio A + Bias
A) x (Input C x Ratio C + Bias C)} /
(Input B x Ratio B + Bias B)] x (Calc
Hi – Calc Lo) + Alg1Bias
Multiplier
(See Note 1)
Multiplier —The following formula
applies:
Alg1 = K x [(Input A x Ratio A + Bias
A) x (Input C x Ratio C + Bias C) x
(Input B x Ratio B + Bias B)] x (Calc
103
Chapter 4 - Configuration