Honeywell UDC2500 - Manual (Page 137)

Monitoring and Operating the Controller
4/07 UDC2500 Universal Digital Controller Product Manual 123
Run/Monitor the program
Prior to running the program, make sure all the “SP PROG” function prompts under the
Set Up group “SP RAMP” have been configured with the required data.
“HOLD” appears periodically in the upper display indicating that the program is in the
HOLD state.
ATTENTION SP Programmer parameter cannot be changed during RUN state (must be
in HOLD state).
Run/Monitor functions
Table 4-26 lists all the functions required to run and monitor the program.
Table 4-26 Run/Monitor Functions
Function Press Result
Set the Local
Setpoint
Lower
Display
Lower
Display
Lower
Display
Upper Display = PV value
Lower Display = SP
or To set the Local Setpoint value to where you
want the program to start out.
Run State
Run
Hold
Run
Hold
Run
Hold
Initiates the setpoint program.
“RUN” appears in the upper display indicating
that the program is running.
Hold State
Run
Hold
Run
Hold
Run
Hold
Holds the setpoint program.
“HOLD” appears in the upper display
indicating that the program is in the HOLD
state.
The setpoint holds at the current setpoint.
External Hold If one of the Digital Inputs is programmed for
the HOLD function, then contact closure
places the controller in the HOLD state, if the
setpoint program is running.
The upper display will periodically show
“HOLD” while the switch is closed.
ATTENTION The keyboard takes priority
over the external switch for the RUN/HOLD
function.
Reopening the HOLD switch runs the
program.
To Begin
or To go back to the beginning of the program.