Honeywell UDC 3300 manual IN1 LO Ratio Bias IN1 Filter Burnout, None Down Nofs

Lower Display

Prompt

IN1 LO

RATIO 1

BIAS IN1

FILTER 1

BURNOUT

Upper Display

Range of Setting

or Selection

–999. To 9999. Floating (in engineering units)

–20.00 to 20.00

Floats to 3 decimal places

–999. to 9999.

(in engineering units)

0 to 120 seconds No filter = 0

NONE

UP

DOWN

NO_FS

Parameter

Definition

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. The control setpoint for Input 1 will be limited by the range of units selected here.

RATIO ON INPUT 1— Select the Ratio value you want on Input 1.

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.

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.

1-5V, 0-10V, or 4-20 mA inputs require no burnout or NONE selection.

NO BURNOUT— Pre-configured Failsafe output applied if failed input is detected (does not apply for an input out of range). Error message INPUT 1 FAIL is flashed on the lower display intermittently every 10 seconds.

UPSCALE BURNOUT will make the PV signal increase to full scale when a sensor fails, and flash INPUT 1 FAIL on the lower display intermittently every 10 seconds.

The controller remains in Automatic control mode and adjusts the controller output signal in response to the full scale PV signal developed by the Burnout circuitry.

DOWNSCALE BURNOUT will make the PV signal decrease to the lower range value when a sensor fails, and flash INPUT 1 FAIL on the lower display intermittently every 10 seconds.

The controller remains in Automatic control mode and adjusts the controller output signal in response to the zero percent PV signal developed by the Burnout circuitry.

NO FAILSAFE— This selection does not provide input failure detection and should only be used when an absolute accuracy is the most important criteria. (For this selection, no burnout signal is sent to the sensor.)

ATTENTION For no Burnout, i.e. NONE, to function properly on a 4-20 mA input, there must be a dropping resistor directly across the input terminals (i.e., not remote), then the unit can detect the “zero” voltage that occurs when the 4-20 mA line is opened.

114 UDC 3300 Process Controller Product Manual 4/00