User Guide

16
Backup
History Database
388
Siemens User Guide Version 2.1 A6V10415471_en_a_21
Building Technologies 2015-07-15
 Once the backup starts, click Cancel if you want to abort the operation. The
backup status changes to Cancelling. When the abort operation completes,
the backup status changes to Last Backup Cancelled. The directory
created is removed from the Main Server.
Technical Notes
 If the backup timeout is exceeded, the backup is aborted and its status displays
the error Last Backup Failed for Timeout Expiration.
 During the backup operation (status is In Progress or Cancelling), if the
system crashes, the backup status displays Last Backup Failed, but the
directory containing the interrupted backup is not removed. You should remove
any failed backup files. See your System Administrator for details.
16.2 History Database
The history database (HDB) is used to log all user and system activities as well as
online and offline trend data. The history database guarantees storage of the
following data:
 User activities in the system
 Alarms and their treatment
 What faults have occurred and handled as batch messaging
 Type of values logged in trend
Backing up
To prevent losing saved data, a manual data backup [➙ 388] or an automatic data
backup [➙ 390] can be executed. For server failures or exchange, you can restore
the last backup to the project. For more information see
System Management
Console (
A6V10415491).
Deleting Data
To prevent history database overflow, the oldest data must be deleted periodically.
This can be done either on time in Desigo CC or manually using the System
Management Console. For more information see
System Management Console
(
A6V10415491).
NOTE:
Back up the data prior to manually or automatically deleting the history data.
16.2.1 Backing up Data
If no automatic data backup is set up, data can be backed up manually from time to
time.