Honeywell UDC3500 Product Manual page 174

Configuration
Function Prompt
Lower Display
Digital Input
prompts for
Software Options
158
Selections or
Range of Setting
Upper Display
To PURGE
PURG AX
Lo FIRE
MAN LAT
RES TOT
PV HOLD
UDC3500 Universal Digital Controller Product Manual
Parameter
Definition
TO PURGE—Contact closure forces the loop to
Manual mode with the output set to the Output High
Limit configuration. MAN lights and then the Output
value is shown on the lower display. Opening the
switch has no effect.
Pressing the
Man/Auto
Automatic Mode.
ATTENTION Does not apply to Three Position
Step Control.
PURGE AUXILIARY OUTPUT—When the switch is
closed, any Auxiliary Output configured for OUTPUT
will go to 100% (20 mA). When switch reopens, the
Auxiliary Output resumes normal operation.
LOW FIRE—Contact closure forces the loop to
Manual mode with the output set to the Output Low
Limit configuration. MAN lights and the Output value
is shown on the lower display. Opening the switch
has no effect.
Pressing the
Man/Auto
Automatic Mode.
ATTENTION Does not apply to Three Position
Step Control.
MANUAL LATCHING—Contact closure transition
forces the loop to Manual mode. Opening the switch
has no effect. If the
Man/Auto
the switch is closed, the loop will return to Automatic
mode.
RESET TOTALIZER—Contact closure transition
resets the accumulated Totalizer value to zero.
Opening the switch has no effect.
PROCESS VARIABLE HOLD—When the switch is
closed, PV is frozen at last value. When switch
opens, PV resumes normal operation after 2
seconds.
SOFTWARE OPTIONS DIGITAL INPUTS—The
following Digital Input selections appear only when
the Healthwatch Software Option is installed.
key returns the instrument to
key returns the instrument to
key is pressed while
3/07