Honeywell UDC2500 Power outage Digital input remote switch operation, Lower Display = XXHH.MM

Monitoring and Operating the Controller

Function		Press	Result
Viewing the present			Upper Display = PV value
		Lower
ramp or soak		Display	Lower Display = XXHH.MM
segment number			Time remaining in the SEGMENT in hours and
	until you see
and time
			minutes. XX = The current number, 1 to 12.
Viewing the number			Upper Display = PV value
		Lower
of cycles left in the			Lower Display = REC_XX
		Display
program			Number of cycles remaining in the setpoint
	until you see
			program. X = 0 to 99
End Program			When the final segment is completed, the
			“RUN” in the upper display either changes to
			“HOLD” (if configured for HOLD state), or
			disappears (if configured for disable of setpoint
			programming).
			• The controller either operates at the last
			setpoint in the program or goes into manual
			mode/failsafe output.
Disable Program			See Section 3 – Configuration Group
			“SPPROG” for details.

Power outage

ATTENTION If power is lost during a program, upon power-up the controller will be in hold and the setpoint value will be the setpoint value prior to the beginning of the setpoint program. The program is placed in hold at the beginning. The mode will be as configured under “PWR UP” in the “CONTROL” group.

Digital input (remote switch) operation

Program can be placed in RUN or HOLD state through a remote dry contact connected to optional digital input terminals, as follows:

RUN—contact closure places Program in RUN state, OR HOLD—contact closure places Program in HOLD state

Opening the contact will cause the Controller to revert to its original state.

124 UDC2500 Universal Digital Controller Product Manual 4/07