Configuration
Function Prompt Selections or
Parameter
Lower Display
Range of Setting
Upper Display
Definition
DEV
DEVIATION (PROCESS VARIABLE MINUS
SETPOINT)—Represents –100 % to +100 % of the
selected PV span in engineering units.
Zero deviation will produce a center scale (12 mA or
50 %) output. A negative deviation equal in
magnitude to the Auxiliary Output High Scaling
Factor will produce a low end output (4 mA or 0 %)
output. A positive deviation equal in magnitude to
the Auxiliary Output Low Scaling Factor will produce
a high end output (20 mA or 100 %).
FOR EXAMPLE:
Input 1 = Type T High Thermocouple
PV range = –300 °F to +700 °F
PV span = 1000 °F
Deviation Range = –1000 °F to +1000 °F
Auxiliary Output Low Scale Value = 0.0
Auxiliary Output High Scale Value = 1000
If PV = 500 °F and SP = 650 °F
then Deviation Display = –150 °F, which is
–7.5% of the Deviation Range, so
Auxiliary Output = 50% – 7.5% = 42.5%
OUTPUT
OUTPUT—Represents the displayed controller
output in percent (%). Cannot be used with
Three Position Step Control.
SP
SETPOINT—Represents the value of the setpoint
currently in use (LSP1, LSP2, LSP3, RSP or CSP)
and is shown in the same units as those used by the
PV.
LSP 1
LOCAL SETPOINT ONE—Auxiliary output
represents Local Setpoint 1 regardless of active
setpoint.
RSP
REMOTE SETPOINT – Represents the configured
RSP regardless of the active SetPoint.
IN ALG1
INPUT ALGORITHM 1 OUTPUT—Represents the
output from input algorithm 1.
CO RANGE
4-20mA
0-20mA
AUXILIARY CURRENT OUTPUT RANGE—Allows
the user to easily select 4-20mA output or 0-20mA
output operation without the need for recalibration of
the instrument.
ATTENTION Changing the Auxiliary Current
Output Range will result in the loss of Field
Calibration values and will restore Factory
Calibration values.
12/04 UDC3200 Universal Digital Controller Product Manual 79
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