Options Group; Table 3-7 Option Group Function Prompts - Honeywell UDC2500 Product Manual

3.7

Options Group

Introduction
The Options group lets you configure the remote mode switch (Digital Inputs) to a
specific contact closure response, or configure the Auxiliary Output to be a specific
selection with desired scaling.
Function Prompts
Function Prompt
Lower Display
AUXOUT

Table 3-7 OPTION Group Function Prompts

Selection or Range of Setting
Upper Display
NONE
PROC
DEV
UDC2500 Universal Digital Limit ControllerProduct Manual
Parameter
Definition
AUXILIARY OUTPUT SELECTION
This selection provides an mA output
representing one of several control
parameters. The display for auxiliary output
viewing will be in engineering units for all but
output. Output will be displayed in percent.
ATTENTION Other prompts affected by
these selections: 4mA VAL and 20mA VAL.
ATTENTION Output cannot be configured
when Three Position Step Control is used.
NO AUXILIARY OUTPUT
PROCESS VARIABLE—Represents the
value of the Process Variable. PV = Input
XxRatioX + BiasX
DEVIATION (PROCESS VARIABLE
MINUS SETPOINT)—Represents –100 %
to +100 % of the selected PV span in
engineering units.
FOR EXAMPLE:
Type T Thermocouple
PV range = –300 °F to +700 °F
PV span = 1000 °F
Deviation Range = –1000 °F to
+1000 °F
If PV = 500 °F and SP = 650 °F
then Deviation Display = –150 °F
and Auxiliary Output
When Deviation is selected, only one
operating parameter will be entered. This
value represents the deviation level that will
produce 20 mA (100 %) output. Zero
deviation will produce a center scale (12 mA
or 50 %) output. A negative deviation equal
Configuration
= 42.5 %
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