Eclipse UDC2500 Limit - Page 43

Configuration
8/05 UDC2500 Universal Digital Limit ControllerProduct Manual 33
Function Prompt
Lower Display
Selection or Range of Setting
Upper Display
Parameter
Definition
IN1 LO
−999 to 9999 floating in
engineering units
INPUT 1 LOW RANGE VALUE in
engineering units is displayed for all inputs
but can only be configured for linear or
square root transmitter characterization.
Scale the #1 input signal to the display value
you want for 0 %. See example above.
ATTENTION The control setpoint for Input
1 will be limited by the range of units
selected here.
BIAS 1
−999 to 9999 floating in
engineering units for Non-FM
Models
-10 to 10 floating in engineering
units for FM Models
BIAS ON INPUT 1 — Bias is used to
compensate the input for drift of an input
value due to deterioration of a sensor, or
some other cause. Select the bias value you
want on Input 1.
FILTR1
0 to 120 seconds
0 = No Filter
FILTER FOR INPUT 1—A software digital
filter is provided for Input 1 to smooth the
input signal. You can configure the first order
lag time constant from 1 to 120 seconds. If
you do not want filtering, enter 0.
BURNOUT PROTECTION (SENSOR
BREAK) provides most input types with
upscale or downscale protection if the input
fails.
UP
UPSCALE BURNOUT will force the Input 1
signal to the full scale value when the sensor
fails. Diagnostic message IN1 FAIL
intermittently flashed on the lower display.
The controller remains in Automatic control
mode and adjusts the controller output signal
in response to the full scale Input 1 signal
developed by the Burnout circuitry.
DOWN
DOWNSCALE BURNOUT will force the
Input 1 signal to the lower range value when
the sensor fails. Diagnostic message IN1
FAIL intermittently flashed on the lower
display.
BRNOUT
ATTENTION For Burnout to function
properly on a 0-20 mA input type (or a 0-5V
type that uses a dropping resistor), the
dropping resistor must be remotely located
(across the transmitter terminals).
Otherwise, the input at the UDC terminals
will always be 0 mA (i.e., within the normal
operating range) when the 0-20 mA line is
opened.