Honeywell UDC2500 manual Fsmode, Failsafe Mode, Minrpm

Configuration

Function Prompt		Selection or Range of Setting		Parameter
Lower Display		Upper Display		Definition
English	Numeric	English	Numeric
	Code		Code
FSMODE	817			FAILSAFE MODE
		No L	0	NON LATCHING—Controller stays in last
				mode that was being used (automatic or
				manual); output goes to failsafe value.
				(NOTE 1, NOTE 2)
		LACH	1	LATCHING—Controller goes to manual
				mode; output goes to failsafe value. (NOTE
				2)
PBorGN	818			PROPORTIONAL BAND UNITS—Select
				one of the following for the Proportional (P)
				term of the PID algorithm:
		GAIN	0	GAIN selects the unitless term of gain for the
				P term of the PID algorithm.
				Where: GAIN = 100 % FS
				PB%
		PB	1	PROPORTIONAL BAND selects units of
				percent proportional band for the P term of
				the PID algorithm.
				Where: PB % = 100 % FS
				GAIN
MINRPM	819			RESET UNITS—Selects units of minutes per
				repeat or repeats per minute for the I term of
				the PID algorithm.
				20 Repeats per Minute = 0.05 Minutes per
				Repeat.
		MIN	0	MINUTES PER REPEAT—The time
				between each repeat of the proportional
				action by reset.
		RPM	1	REPEATS PER MINUTE—The number of
				times per minute that the proportional action
				is repeated by reset.

NOTE 1: Does not apply to Three Position Step Control.

NOTE 2: If controller is in Manual upon failure, output will maintain its value at time of failure.

NOTE 3: These selections appear when the Control Algorithm is selected for 3PSTEP.

NOTE 4: The local setpoint will automatically adjust itself to be within the setpoint limit range. For example, if SP = 1500 and the SP HiLIM is changed to 1200, the new local setpoint will be 1200.

NOTE 5: Reset limits and Dropoff are not displayed when Three Position Step Control is configured.

66 UDC2500 Universal Digital Controller Product Manual 4/07