Honeywell UDC 3300 Product Manual page 154

Lower Display
Prompt
AL HYST
ALM OUT1
BLOCK
How to configure alarm
to turn on and off with
HealthWatch
142
Upper Display
Range of Setting
or Selection
0.0 to 100.0 % of span or full
output as appropriate
NO LAT
LATCH
DISABL
BLOCK1
BLOCK2
BLK 12
Configure Alarm n Setpoint 1 Value as the turn-on time or count, that is,
the alarm turns on when the timer or counter reaches this value.
Configure Alarm n Setpoint 2 Value as the turn-off time or count, that is,
the alarm turns off after being on for this much time or this many counts.
When the setpoint is reached it resets any HealthWatch timer or counter
associated with Alarm1 Setpoint1 or 2 and Alarm 2.
Example
To turn on Alarm 1 after 30 days for 2 minutes.
1. Under Alarms group, configure A1S1TYPE as TIMER1. Configure
A1S1 VAL as 720 hours (30 days x 24 hours). Configure A1S2 VAL
as 0.033 hours (2 minutes/60 minutes because setpoint units are in
hours).
2. Under Maintenance group, configure TIME1 as LAST R (time since
last reset). Configure TIME2 as AL1SP1.
UDC 3300 Process Controller Product Manual
Parameter
Definition
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 FOR OUTPUT 1—Each alarm output
can be configured to be Latching or Non-latching.
NO LAT—Non-latching
LATCH—Latching
ATTENTION When configured for latching, the alarm will
stay on, 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.
DISABL—Disables blocking
BLOCK1—Blocks alarm 1 only
BLOCK2—Blocks alarm 2 only
BLK 12—Blocks both alarms
ATTENTION When enabled on power up or initial
enabling via configuration, the alarm will not activate
unless it has not been in alarm for one cycle (167 ms).
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