View/Acknowledge Alarms - t.a.c. Xenta OP Handbook

TAC Xenta OP Handbook

4.3 View/acknowledge alarms

Possible events at alarms and the way they are presented in the alarm list: time, Alarm text, status
TAC AB, 2001-08-08
To make the operator aware of unacknowledged alarms in the alarm
list the abbreviated application/base unit name ("AH02" in our exam-
ples) will flash. When the item "Alarms" has been found and selected
with Enter, a screen like the following will appear:
AH02 ALARMS: 6/6
P1
PUMP STOPPED
99-JAN-15
On the top row there is an indication that this is alarm number six of
six in the list. To see the other alarms in the list use
The text "ON" in the above alarm example indicates that the alarm
has tripped but not been acknowledged.
A selected alarm is acknowledged when the operator presses
(Enter). The text "ON" will change to, for example, "ACK".
Alarms which have tripped and then returned to normal state are
indicated with "OFF".
On the Operator panel, for each point at any given moment, at most
one of the three alternatives below can appear:
ON
Transitions between these three states at moments in time t1, t2 etc.,
and the disappearance from the list, may occur in the way shown in
the diagram below.
Acknowledge
New Alarm
t1 Alarm ON
Alarm goes
off
The alarm list is sorted in chronological order with the oldest event
displayed at the top. The alarm list is dimensioned to allow all points
of alarm to appear at the same time.
4 Dialogs with TAC Xenta 300 and 401
14:05 ON
ON ACK
OFF
Alarm goes off
t2a Alarm ACK
New alarm
Acknowledge
t1 Alarm ON
t2b Alarm OFF
New alarm
or .
- - - -
t3 Alarm ON
- - - -
t3 Alarm ON
0-004-7506-4 (EN), 25 (36)