Store System and User Activities

The History Database guarantees the storage of user activities in the system, alarms and their treatment, faults that occurred and are handled as batch messaging, type of values logged in trend.

• User and System Activities (Activity Log): User events are actions triggered manually by any user. A user event is logged when a user:
• Starts a program
• Exits a program
• Saves data
• Establishes a connection
• Disconnects
• Logs off
• Logs on
• Changes a property
• Takes manual control of the system (user action)
• Checks the system (user action)
• Changes an object (or one of its properties)
• Changes the state of a particular object

An event is also logged when:

• The hard drive is full
• A password is wrong
• Alarms (Event Log): All alarm state changes controlled by the Desigo CC alarm system are logged as alarm events. An alarm is logged when:
• A digital alarm is triggered
• An alarm is acknowledged
• An alarm is reset
• An alarm is disabled
• An alarm is triggered when a high limit value is exceeded
• An alarm is triggered when a low limit value is exceeded
• An alarm without feedback is triggered
• Trend Logging (Value Log): All Trend data is logged when:
• The value changes
• Data is uploaded from a Trend Log object