Alarms are used to alert operators of conditions that need attention (e.g., high well level, pump didn't start when called to run, station is offline). The ability to view and acknowledge alarms is based on the user's permission level.

When an alarm occurs, the alarm button on HT3's system tray turns red and begins blinking. A button that is red, but not blinking, indicates that there are active alarms, but they have all been acknowledged. When you place the mouse pointer over the button, the status bar displays the total number of alarms and also shows the number of active alarms and the number of unacknowledged alarms.

Alarm Notification Options

Alarm activity can be viewed in HT3's Alarm Viewer. Alarm Viewer lists all active, acknowledged, and cleared alarms, and gives you the ability to acknowledge the active and cleared alarms. You can open Alarm Viewer by clicking the alarm button in the system tray or by clicking View on the HT3 main menu and then clicking Alarms on the View submenu.

In addition, alarms can be configured to:

  • Play a pre-recorded alarm message (via a speaker or PA system)
  • Alert users via phone or email. There are five phone/email notification options that include having the system leave a message on an answering machine or on a numeric pager.

By having the system announce locally or send out alarm notifications, you'll always know when alarms occur - even if you're away from the computer or away from the plant.

If you purchase the optional HT3 Mobile package, you'll also be able to monitor and acknowledge alarm conditions using your smart phone.

Alarm Log

HT3 maintains a log of all alarm activity, including information on who an alarm was acknowledged by and the time the alarm was acknowledged. This information can be viewed for an individual alarm from Alarm Viewer or for all alarms by creating an Alarm Log Report (one of the advanced reports included in HT3).

To view information on an acknowledged alarm (displayed in yellow text), you click the telemetry address of the acknowledged alarm. The selected address is surrounded by a broken, yellow line and alarm's color changes to yellow.

If you click the telemetry address of the acknowledged alarm, the Message bar displays the date the alarm occurred, the login of the individual who acknowledged the alarm, and the date and time at which the alarm was acknowledged.

Alarm Viewer

Alarm Viewer is one of the key parts of the HT3 SCADA software. Its user-friendly environment provides you with important, up-to-the-moment, alarm-activity information, which enables you to quickly respond to critical situations.

Alarm Viewer features the ability to acknowledge alarms if your user account has been granted acknowledgement permission. When an alarm is acknowledged, Alarm Viewer logs the user name of the individual who acknowledged the alarm, and the date and time the alarm was acknowledged. This information can be viewed at any time by clicking the telemetry address of the acknowledged alarm.

Alarm Viewer can be opened from the HT3 menu bar or by clicking the Alarm icon that is displayed in HT3's system tray. This icon will turn red and begin blinking when an alarm occurs.

Alarm Viewer's Interface

Column Headers

Features the Time, Address, Name, and Description headers. Click on a header to sort alarms using that criteria. Click on the same header again to switch between descending and ascending order.

Display Area

Displays all pertinent alarm information: Time alarm occurred, telemetry address of point, user-defined name of point, user-defined description of alarm (as defined in Configuration Editor).

Sort by Status Button

Sorts the alarm list by status. Click the button to display the alarm list in the following order: Alarm (red), Acknowledged (yellow), Cleared (green). Click the button again to reverse the order.

Message Bar (area directly beneath Display area)

Displays important information including:

  • date alarm occured
  • user name of individual who acknowledged the selected alarm
  • date and time the alarm was acknowledged

Alarm Types and Colors

Alarm Viewer features three alarm categories. Each of these alarm types appears in a different color in the Display area, so that they are easily recognizable. The three alarm categories are: Alarm (red), Acknowledged (yellow), Cleared (green).

  • Red - The point is currently in the alarm state and has not been acknowledged.
  • Yellow - The point is currently in the alarm state and has been acknowledged.
  • Green - The point was in an alarm state, is now cleared, but has not been acknowledged.

Sorting Alarms

Alarm Viewer offers five ways to sort alarms. These are:

  • Time -Time alarm occurred
  • Address - Telemetry address of point
  • Name - User-defined name of point
  • Description - User-defined alarm label for point
  • Status - Current status of points (ALARM, ACKNOWLEDGED, CLEARED)

Delay and Snooze

When you configure an alarm, you have the option of specifying a Delay and/or Snooze time. For this reason, it is important to frequently view alarm activity via Alarm Viewer.

  • Delay is the amount of time (in seconds) that the point is allowed to be in the alarm state before it appears in Alarm Viewer.
  • Snooze is the amount of time (in seconds) that is allowed to pass before an ACKNOWLEDGED alarm that has not cleared is returned to ALARM status.

An alarm configured with a Delay or Snooze time is not displayed in Alarm Viewer until the specified time has elapsed.

Acknowledging Alarms

To acknowledge alarms, you must be logged in with an account that has been granted Acknowledge Alarms permission. To acknowledge an alarm, you simply click the telemetry address of the alarm you want to acknowledge.

  • Alarms with ALARM status change from red to yellow when they are acknowledged.
  • Alarms with CLEARED status disappear from the alarm list when they are acknowledged.

The Message bar displays the user name of the individual who acknowledged the alarm and the time the alarm was acknowledged.

When an ACKNOWLEDGED alarm clears (is no longer in an alarm state), it is removed from the alarm list.