Principle. Schneider Electric XBTF / TXBTF Graphic terminals (Tome 2)

6. Alarm history log

Principle

The terminals can manage an alarm page log. The alarm descriptions and state, the equipment data, the date and time status are stored in this log. The alarms are stored one after the other, and when the log is full, the oldest alarms are overwritten by the most recent ones.The log recording capacity is 500 events.

Each alarm event:

- Appearance,

- Acknowledgment,

- Disappearance.

is recorded and time-stamped.

The following functions can be performed:

- On the PLC's initiative:

- Printing the alarm log,

- Clearing the alarm log.

- On the operator's initiative:

- Displaying the alarm log,

- Printing the alarm log,

- Clearing the alarm log (in confidential mode),

- Displaying the selected alarm page.

The log is useful for analyzing the sequence of events which has led to a given machine state.

D - 48 Graphic Magelis