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| 1. Automatic alarm suppression |
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AAASuite automatically identifies the following kinds of nuisance alarms and suppresses their repetition by the DCS functions.
-Repeating HI/LO alarms caused by incorrect alarm setting
-Longstanding false HI/LO alarms caused by incorrect alarm hysteresis setting
-Oscillating HI/LO alarms caused by incorrect PID setting
-Input out of range alarms caused by overrange
-Input out of range alarms caused by minor transmitter problems
-Repeating annunciators caused by incomplete the DCS sequence
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| 2. Automatic alarm re-notification |
AAASuite automatically and periodically re-notifies the following important alarms to bring them to the attentions of the operators.
-Longstanding true HI/LO alarms
-Longstanding input out of range alarms caused by a broken wire |
| 3. Automatic alarm prediction |
| HH/LL alarms often serve as the trigger an interlock sequences that leads to an emergency shut down. AAASuite automatically predicts when a process will reach its alarm limits and issues a timely alert to operators, enabling them to intervene before a process reaches the HH/LL state. |
| 4. Dynamic alarm setting (Optional) |
| An alarm threshold should be adjusted when there is a change in the operation conditions (e.g. grade change, load change). When such a change occurs, AAASuite automatically downloads the optimum alarm threshold(stored in a CSV format file) to the DCS. When the operation conditions change again, AAASuite uploads to this CSV format file current alarm threshold that is stored in the DCS. |
| 5. Advanced and intelligent alert (Optional) |
AAASuite can issue advanced types of alerts that add value in the monitoring of:
-field instruments
-process equipment
-process performance
-human error |
| Steps |
Key function |
Result |
| 1 |
Suppression of repeating nuisance alarms |
Nuisance alarms drastically decreased |
| 2 |
Optimization of alarm setting |
Nuisance alarms drastically decreased |
| 3 |
Re-notification of longstanding true alarms |
Alerts slightly increased |
| 4 |
Prediction of critical HH/LL alarms |
Alerts slightly increased |
| 5 |
Addition of more advanced alerts |
Alerts slightly increased |
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