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42 The Workstation Installation/Operation Manual Version 2 Document 51540 Rev. B1 4/8/02
2.2.3 Event Handling
When the Event Manager sends an off-normal event to the workstation, the event is placed in the New Events list
box on the main screen. It remains there until it is acknowledged either locally or by another workstation on the
network which is controlling the device. The Alarm Summary list above the new event box provides a count of
the events received of each type.
When there is an event in the
New Events box, an audible alert is sounded on the computer. If auto-navigation is
activated on the device in question, the screen display will move to show that device (unless there is an alarm of
equal or greater priority that has not yet been acknowledged). Events are ordered in both event boxes based on
priority to ensure that an operator deals with the most urgent alarms first.
To acknowledge an event in the new event box, you can do one of three things:
1. Click on the ACK button in the Event Display. This will acknowledge the top
(highest priority) event in the New Events box.
2. Click on the event itself in the New Events box in the Status column.
3. Use a functional button or hotkey that has been defined to send an acknowl-
edgment to some or all devices.
The following options are also available from the Event Display.
New Events
Double left clicking on either column acknowledges the event and navigates to
the screen the device is on.
The
Device ID column :
--Single left click - produces a button next to the device. When clicked, it opens
a detailed information box for that event and device.
--Single right click - opens the pop-up menu associated with the device.
The Status column:
--Single left click - acknowledges the event.
Acknowledged Events
Double left clicking either the Status or the Device ID column navigates to the
screen the device is on.
The
Device ID column :
--Single left click - produces a button next to the device. When clicked, it opens
a detailed information box for that event and device.
--Single right click - opens the pop-up menu associated with the device.
Clearing A Single Event - To clear a specific event, right click on the desired
event, then select
Clear Event
from the menu.
When an event is acknowledged, if it is a paired event, it moves to the acknowl-
edged event box where it stays until the related event is also received and ac-
knowledged. If the event is a single event, it disappears when acknowledged,
since single events do not represent a lasting change of condition.
Once a device status is returned to normal (usually by receiving the related pair
event, such as a fault event and a fault-off event), its entry in the Acknowledged
Events box will disappear.
Alarm states are the exception to this rule. These states will stay in the event box
until the panel associated with these states is reset. This is because the alarms
actually latch at the panels, and the operator should be aware that the panel
requires a reset. Alarm-off states that have been acknowledged will clear once
the panel is reset and all panel states have returned to normal.
NOTE: If a device is acknowledged at a workstation, it is only acknowledged locally and does not
actually affect the device or other workstations on the network unless the current workstation has control
of the specific device. This is not generally an issue in single workstation setups, but for multi-worksta-
tion setups, please refer to the control profiles section of the operators manual for more information on
the control of devices.
Figure 2-7: Event
Display Box