Configuration

 

 

 

 

 

 

 

 

Function Prompt

Selection or Range of Setting

Parameter

 

Lower Display

 

Upper Display

Definition

 

English

Numeric

English

Numeric

 

 

 

 

Code

 

 

Code

 

 

 

 

 

TIMR

 

12

TIMER—Contact closure starts timer, if

 

 

 

 

 

 

enabled. Reopening the switch has no

 

 

 

 

 

 

effect.

 

 

 

TUNE

 

13

INITIATE LIMIT CYCLE TUNING—Contact

 

 

 

 

 

 

closure starts the slow tuning process. The

 

 

 

 

 

 

lower display shows DoSLOW. Opening the

 

 

 

 

 

 

contact has no effect.

 

 

 

INIT

 

14

SETPOINT INITIALIZATION—Contact

 

 

 

 

 

 

closure forces the setpoint to the current PV

 

 

 

 

 

 

value. Opening the contact has no effect.

 

 

 

RSP

 

15

TO REMOTE SETPOINT—Contact closure

 

 

 

 

 

 

selects the Remote setpoint.

 

 

 

MNLT

 

16

MANUAL LATCHING—Contact closure

 

 

 

 

 

 

transition forces the loop to Manual mode.

 

 

 

 

 

 

Opening the switch has no effect. If the M-A

 

 

 

 

 

 

RESET key is pressed while the switch is

 

 

 

 

 

 

closed, the loop will return to Automatic

 

 

 

 

 

 

mode.

 

 

 

TRAK

 

17

OUTPUT TRACKS INPUT 2—Contact

 

 

 

 

 

 

closure allows Output to track Input 2. While

 

 

 

 

 

 

the switch is open, the output is in

 

 

 

 

 

 

accordance with its pre-defined functionality.

 

 

 

 

 

 

When the switch is closed, the output value

 

 

 

 

 

 

(in percent) will track the Input 2 percent of

 

 

 

 

 

 

range value. When the switch is reopened,

 

 

 

 

 

 

the output will start at this last output value

 

 

 

 

 

 

and normal PID action will then take over

 

 

 

 

 

 

control. The transfer is bumpless.

 

 

 

STRT

 

18

PV HOTSTART—Contact closure starts the

 

 

 

 

 

 

SP Ramp or SP Program at the original

 

 

 

 

 

 

selected starting Setpoint Value that existed

 

 

 

 

 

 

at the time that the SP Ramp or Program

 

 

 

 

 

 

was first started. Opening contact has no

 

 

 

 

 

 

effect. This configuration must be selected

 

 

 

 

 

 

prior to the first time the SP Ramp or

 

 

 

 

 

 

Program is placed in the RUN mode, as

 

 

 

 

 

 

otherwise the unit will not be able to capture

 

 

 

 

 

 

the initial Setpoint value. This selection

 

 

 

 

 

 

allows the unit to retain the initial Setpoint

 

 

 

 

 

 

value even if power to the unit is lost.

 

 

 

 

 

 

When the STATE selection in the SP Ramp

 

 

 

 

 

 

or Program Set Up group is set to HOLD and

 

 

 

 

 

 

the digital input contact is left closed, then

 

 

 

 

 

 

when the end of the program or ramp is

 

 

 

 

 

 

reached, the program or ramp will

4/07

UDC2500 Universal Digital Controller Product Manual

71

Page 85
Image 85
Honeywell UDC2500 Initiate Limit Cycle TUNING-Contact, Setpoint INITIALIZATION-Contact, To Remote SETPOINT-Contact closure