Operating panel devices
2.10 EST2 System Operations Manual
Acknowledging prioritized messages
The 2-LCD has separate queues for each message type, and
displays them according to the following priority levels:
• Alarm messages (highest priority)
• Supervisory messages
• Trouble messages
• Monitor messages (lowest priority)
Display
CommentsMessage queues
13:45:55 AP000 DP000
Project Description
Quiescent State
13:47:56 AP001 DP000
Project Description
Monitor Events Received
13:51:00 M:004 13:51
1st Fire Alarm 0126
5 floor elevator
Lobby smoke detector
Fire Alarm Received
13:54:12 AP004 DP000
Project Description
Fire Alarm Acknowledged
14:03:33 M:005 13:57
Open fault 0288
1 floor Laboratory
Trouble Event Received
14:05:55 AP005 DP000
Project Description
Trouble Event Acknowleged
14:05:55 AP005 DP000
Project Description
Monitor Events Acknowleged
13:57:12 M:004 13:51
Monitor Alrm 0235
High temperature on
chiller A27
Monitor Event Acknowleged
Display shows current time (13:45:55) and no
active points.
An event on Monitor device #234 occured at
13:47. Nothing is displayed, because the
event did not occur during an alarm. On the
other hand, the AP counter increases by the
number of events.
A fire alarm on device #0126 occured at
13:51, followed by 3 monitor events: 0235,
0236, and 0237. The alarm message is
immediately displayed, and the Message
Waiting counter increments to 004.
The fire alarm on device #0126 was reviewed
using the ALARM switch.
The MONTR switch displays the first
monitor event message.
The monitor events on devices 0236 and 0237
were reviewed in order, using the MONTR
switch.
The trouble on device #0208 was reviewed
using the TRBLE switch.
Alarm
Supervisory
Trouble Monitor
0126
0126
0126
0126
0126
0126
0235
0236
0237
0235
0236
0237
0235
0235
0235
0235
0236
0236
0236
0236
0237
0237
0237
0237
0288
0288
0288
STDOP043.CDR
A trouble on device #0288 occured at 13:57.
The trouble message replaces the monitor
messages on the display, because it has a
higher priority. The Message Waiting counter
incremented to 005.
Figure 2-3: Message priorities
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