Input Math Algorithms; Input Algorithm Selections - Honeywell UDC3500 Product Manual

Monitoring and Operating the Controller

4.13 Input Math Algorithms

Introduction
If selected via Math options, this controller has two input algorithms available. Each
algorithm can be configured to provide a derived (calculated) PV or a derived Remote
Setpoint. Up to three inputs may be applied to the calculation. In addition, the two
algorithms may be "linked" to combine two calculations by configuring one algorithm to
be an input to the other algorithm.
Standard functionality
The following algorithms are provided as standard on all instruments with two or three
analog inputs: Weighted Average, Feedforward Summer, Feedforward Multiplier, or
Relative Humidity.
Math Options
The Math option provides additional algorithms plus two Characterizers, Totalizer, and
Polynomial functions.

Input algorithm selections

Algorithm selections are made in Section 3 – Configuration. The following function
prompts can be found in the Algorithm Set Up group:
IN ALG1
IN ALG2
These selections include the following algorithms:
Weighted Average
Feedforward Summer
Relative Humidity
Summer
Hi Select
Lo Select
√ Multiply Divide
√ Multiply
Multiply Divide
Multiply
Feedforward Multiplier
Carbon Potential (several types)
Oxygen
Dewpoint
The formulas for these selections are given in Section 3.8.
204 UDC3500 Universal Digital Controller Product Manual 10/05