Honeywell UDA2182 manual Auxiliary Configuration, Switch, Func Gen Function Generator

Configuration

6.13 Auxiliary Configuration

Overview

The Auxiliary group has four selections (Switch 1 and Switch 2) and (Func Gen 1 and Func Gen 2).

Switch

Switch selections have 2 input sources (A and B). A switch block is used to select between two analog signals. The switch block can be used for many monitor and control strategies. A Digital Signal Source (Table 6-4) when active will select the B input source of the switch as the output.

The Switch Input sources can be any Analog Signal Source (Table 6-3). There are two switch blocks provided for general use.

Func Gen (Function Generator)

Function Generators are used for pre-control linearizing of inputs (such as during pH titration).

Function Generator selections have 2 input sources (Input 1 PV and Input 2 PV).

It generates an output characteristic curve based on up to 11 configurable “Breakpoints” for both Input (X) and Output (Y) values.

The figure below shows an example of using the Func Gen to characterize the PID control loop output for control valve operation using 9 breakpoints.

Compensating for control valve characteristic

OUT9

100%

OUT8

OUT7

FGEN

OUTPUT

OUT6

OUT5

OUT4

OUT3

0%OUT2 OUT1

X1 X2 X3 X4 X5 X6 X7 X8

	PID OUTPUT
0%	100%

January 2009 UDA2182 Universal Dual Analyzer Product Manual 89