- Alarm Detection -

Creation of History files
Alarms are only written to the daily history file when their condition becomes Safe. In other words when they have been Acknowledged and Cleared.

Colour coding
There are four alarm states. These are, Activated, Acknowledged, Cleared and Safe.
Activated alarms are shown in Red and exist until acknowledged or cleared.
Acknowledged alarms are shown in Blue and exist until cleared.
Cleared alarms are shown in Yellow and exist until acknowledged.
Safe alarms are shown in Green and only exist until the alarms window is refreshed or the Remove Safe Alarms toolbar button is pressed.

Alarm Columns

• Type column
  This column displays the type of alarm that has occurred. It also displays the quick reference image

• Tag Name column
  This column displays the tag name that the alarm refers to.

• Value column
  This column displays the alarms value, in other words the alarm trigger level.

• Severity (#) column
  This column displays the alarms severity level. This has no real meaning other than to aid the sorting and filtering of historical alarms.

• Activated column
  This column displays the date and time of when the alarm occurred.

• Acknowledged column
  This column displays the date and time of when the alarm was acknowledged.

• Cleared column
  This column displays the date and time of when the alarm cleared.

• Message column
  This column displays the user set alarm message. E.g. Over Temperature.

• Sorting
  When any of the column headers are pressed the associated columns will be sorted. On each press of the column header the sort order will swap between assending and decending order.

Toolbar buttons

Acknowledge button
When pressed all currently selected alarms will be Acknowledged.
note: This only applies to alarms which are currently Activated or Cleared.

Acknowledge All button
When pressed all outstanding alarms will be Acknowledged.
note: This only applies to alarms which are currently Activated or Cleared.

Remove Safe button
When pressed all current Safe alarms will be removed from the display window. This is used mainly to keep the display clear of non-critical conditions.

Historical Mode button

This button has a dual action. When first pressed another dialog box appears presenting a list of historical files that can be loaded. (if any exist)

When one of the available files is selected its associated historical information is loaded into the alarms window. While in historical mode new alarms will not be display. They are still registered though and will be displayed when returning to real time mode.

When this button is pressed again real time mode is restored.

Defaults button
When pressed this button simply returns the alarms window back to its defaults. Includes, resizingthe window, repositioning the window and realigning the columns.

Filter Mode button
When pressed the filters dialog box appears. From this dialog the historical information can be filtered to show only the required data. This window does not need to be closed during filter operations. Therefore, it is possible, for example, to sort the filtered information and then re-filter it, etc.

Filter Dialog

From / To Date and Time Dialog

note: Only available in historical mode.

Print button
Simply printsthecurrently display alarm information, wether real or historical.

Close Window button
Closes the alarms window.
note: If another trip alarms occurs though and it does not have the hidden attribute set (the default) the alarms window will popup again.

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