The AlarmMail facility is a background process which controls the automated dispatch of alert e-mails to specified users (User Name) mail accounts (Mail Address).
|-I||Display Configuration Interface|
|-w||Include Warning and Alarm messages|
|-c||Include Clear messages|
|-p secs||Sleep Period: Interval between reads of alarm database:||Default 10|
|-m mins||Holdoff Period: Identical messages within this period are ignored:||Default 10|
The configuration interface allows enabling of specific alert message types for specified addresses. After settings are edited and saved the AlarmMail process will re-read the configuration database and apply the changes. Subsequent generated alert messages are sent to those users enabled to receive such messages. .
The alert types are as follows :
1. Alerts A, C, D and G – Exceedance.
2. Alert B – Ellipse Boundaries.
3. Alert F – Step Change
4. Alert H – Gradient
5. Alert P – Prodict
Five warning amplitude levels and five alarm amplitude levels are available for each dynamic channel of each plant item. They correspond to the alert levels for each of the first 4 orders and the overall level.
A warning and alarm elliptical boundary are available for each of the first 4 orders. Boundaries are defined in terms of the ellipse centre (X_ref,Y_ref), the length of the major and minor axes (major, minor) and the orientation angle of the major axis (angle).
A warning and alarm difference level are available for each dynamic channel of each plant item. The measurement is the difference between the overall level and the summation of the amplitude levels of the first 4 orders and the subsynchronous component.
Identical to Alert A but corresponding to the subsynchronous component.
A warning and alarm level corresponding to changes in the average level for each of the first 4 orders and the overall level.
Identical to Alert A but corresponding the special fifth order. This may be any order and by default is 5. Care must be taken when specifying this order (using Config process) as the highest order available is dictated by the number of samples acquired per revolution of the plant item.
The user specifies the maximum gradient for a particular channel and parameter over a specified bnumber of days. If the average rate of increase for that channel and parameter is found to be greater than that specified then an alarm is generated.
A multi-parameter enhancement to the elliptical boundary alarms described above (Alert B ). Historical data is analysed and machine states identified using Bayesian classification techniques for multiple static channels. For each of these states vibration data is identified and alarm boundaries calculated.