INFO
Acknowledging an alarm that has a Latch configured, does not remove the alarm from the alarm list. These alarms
must be reset before the alarm protection becomes inactive.
Acknowledging an alarm
To acknowledge an alarm, perform the following steps:
1. Select Alarms to view the alarm list.
2. Highlight the alarm to acknowledge by using Up or Down .
3. Select Acknowledge
by using to acknowledge the alarm.
4. If the alarm condition clears and the alarm has no Latch configured:
• The acknowledged alarm is removed from the alarm list.
5. If the alarm condition clears and the alarm has a Latch configured:
• The acknowledged alarm remains on the alarm list and requires a reset before the alarm is removed.*
6. If the alarm condition remains active:
• The acknowledged alarm remains on the alarm list, but is now marked as acknowledged.
* Until the latched alarm is reset the alarm action (protection) remains active even though the alarm condition has cleared.
8.2.5 Reset latched alarm(s)
Latched alarms that have been already acknowledged, can be reset. Until a latched alarm is reset the Alarm action
(protection) remains active.
CAUTION
You cannot reset any latched alarms if the Alarm condition remains active and alarms exist that have not been
acknowledged. All alarms must be acknowledged before you can reset (unlatch) the latched alarms.
Reset all cleared alarm latches
INFO
Resetting clears all alarm latches for all the latched alarms where the Alarm condition has cleared. Latched alarms
where the alarm condition has not cleared are not affected by the reset.
To reset all cleared alarm latches, perform the following steps:
1. Select Alarms to view the alarm list.
2. Select Reset latches
by using .
3. All alarm latches, that can be reset, are reset.
8.2.6 Shelve alarm(s)
Most alarms on the alarm display can be shelved for a given period of time, if required. After the period of time expires the
controller automatically returns the alarm to the previous state and rechecks the alarm condition.
INFO
If the user logged on does not have the necessary permission access to the Shelve option, you are prompted to log
on.
PPM 300 Operator's manual 4189340910 UK
www.deif.com Page 123 of 157
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