Honeywell UDC2800 Product Manual page 159

Chapter 4 - Configuration
Function
Prompt
A2S2
Hysteresis
Alarm Output 1
Alarm Blocking
159
Selections or Range
of Setting
0.0 to 100.0 % of
span or full output as
appropriate
Non Latching
Latching
Disable
Alarm 1
Alarm 2
Alarm 1 & 2
Parameter Definition
you to force the trigger time of an alarm to
delay for a time period of from 0 to 30
seconds in an alarm condition.
Alarm Hysteresis —A single adjustable
hysteresis is provided on alarms such that
when the alarm is OFF it activates at exactly
the alarm setpoint; when the alarm is ON, it
will not deactivate until the variable is 0.0 %
to 100 % away from the alarm setpoint.
Configure the hysteresis of the alarms based
on INPUT signals as a % of input range span.
Configure the hysteresis of the alarm based
on OUTPUT signals as a % of the full scale
output range.
Latching Alarm Output 1 —Alarm output 1
can be configured to be Latching or Non-
latching.
Non-latching
Latching
ATTENTION: When configured for
latching, the alarm will stay active after
the alarm condition ends until the
RUN/HOLD key is pressed.
Alarm Blocking —Prevents nuisance alarms
when the controller is first powered up. The
alarm is suppressed until the parameter gets
to the non-alarm limit or band. Alarm
blocking affects both alarm setpoints.
Disables blocking
Blocks alarm 1 only
Blocks alarm 2 only
Blocks both alarms