Honeywell UDC2500 User Manual

Page 84

Configuration

UDC2500 Universal Digital Controller Product Manual

4/07

Function Prompt

Lower Display

Selection or Range of Setting

Upper Display

English

Numeric

Code

English

Numeric

Code

Parameter

Definition

HOLD

TO HOLD—Contact closure suspends
Setpoint Program or Setpoint Ramp. When
contact reopens, the controller starts from
the Hold point of the Ramp/Program unless
the Ramp/Program was not previously
started via the RUN/HOLD key.

This selection applies to either loop.

PID2

TO PID2—Contact closure selects PID Set
2.

RUN

RUN—Contact closure starts a stopped SP
Ramp or Program. Upper left character
blinks “R”. Reopening the contact puts
controller in HOLD mode.

This selection applies to either loop.

Begn

EXTERNAL SP PROGRAM RESET—
Contact closure resets SP Program back to
the beginning of the first segment in the
program and places the program in the
HOLD mode. Program cycle number is not
affected. Reopening switch has no effect.

This selection applies to either loop.

ATTENTION Once the last segment of the
setpoint program has timed out, the
controller enters the mode of action specified
in the configuration data and the program
cannot be reset to the beginning of the first
segment by digital input closure.

INHIBIT INTEGRAL (RESET)—Contact
closure disables PID Integral (Reset) action.

MNFS

MANUAL FAILSAFE OUTPUT—Controller
goes to Manual mode, output goes to the
Failsafe value.

ATTENTION This will cause a bump in the
output when switching from Automatic to
Manual. The switch back from Manual to
Automatic is bumpless. When the switch is
closed, the output can be adjusted from the
keyboard.

LOCK

KEYBOARD LOCKOUT—Contact closure
disables all keys. Lower display shows
LOCKED if a key is pressed.