Honeywell UDC 3300 manual How to configure alarm to turn on and off with HealthWatch

Lower Display

Prompt

Upper Display	Parameter
Range of Setting	Definition
or Selection

AL HYST

ALM OUT1

BLOCK

0.0to 100.0 % of span or full output as appropriate

NO LAT

LATCH

DISABL

BLOCK1

BLOCK2

BLK 12

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).

How to configure alarm to turn on and off with HealthWatch

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.

142 UDC 3300 Process Controller Product Manual 4/00