Function Parameter Reference Guide
122 UDC2300 Controller Product Manual 12/00
12.2.10 AUX OUT (AUXILIARY OUTPUT)
This prompt is part of the Options Set Up Group.
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 displayed in percent.
Selections Definitions
DIS
No Auxiliary Output
IN 1
This represents the configured range of Input 1
For example:
Type J Thermocouple (0 °F to 1600 °F)
0 °F display = 0 % output
1600 °F display = 100 % output
IN 2
This represents the configured range of Input 2
PROC
Process Variable
DEV
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
Auxiliary Output = 42.5 %
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 in magnitude to the auxiliary output high value
will produce a low end (4 mA or 0 %) output.
OUTPUT
OUTPUT – represents the displayed controller output in percent (%).
Cannot be used with 3 Position Step Control.
SP
SETPOINT – represents the value of the setpoint in units of PV.
LSP1
Local Setpoint One – Auxiliary output represents local setpoint one
regarless of active setpoint.
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