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HMXCC1-G2 User’s Manual
Chapter 7 Failover for Database Replication
101
Figure 7-15
(2) Master/Slave controller units operate in parallel in the system; the Failover is not enabled by the slave unit.
In Replication Mode, the failover function for the slave unit is not enabled by the user. Once the master unit fails, the slave unit
will not automatically replace the failed master unit. The administrator needs to manually download the setting data and logs
from the salve unit to the PC. Next, restore the backup files in the PC back to a new controller unit. Remove the failed master
unit and put the new master unit back to the same network environment as the failure master unit. Change its User/Device IP
settings as the failure master unit and reboot the new master unit to resume the system operation.
Figure 7-16
As above mentioned
，
as the Failover function is not enabled, it still needs the administrator to manually setup and replace the
failed controller units at the first moment the system failed. The user can determine to enable it or not according to his
application. [Note]: Once the system operates with a master unit and a slave unit in parallel
，
the slave unit will regularly
backup the setting data and logs from the master unit to itself. The Failover function checkbox only correlates to the decision of
letting the slave unit automatically replace the failed master unit to resume the system.
Download the setting data of the controller unit to the PC and Restore the backup files in the PC back to the controller unit