After 2000 backups an attempt to perform a backup to flash results in the error 'Flash backup for this controller has been disabled.'
- Continuum b3920 controller
- Continuum i2920 controller
Flash memory has a limited write count; Controllers implement a flash circuit breaker that trips after 2000 backup operations in order to protect the flash device from damage.
(Applies to all b3 and i2 controllers)
EcoStruxure Building Operation
In EBO, a command has been added that will re-enable backup to flash after the circuit breaker has been tripped (2000 backups)
- From Workstation, in the object tree, right-click the i2/b3 device.
- From the context menu select, DEVICE->ENABLE BACKUP TO FLASH
From CyberStation command line set the ACCStatusBackup system variable of the device to ACCBackupEnable.
The flash circuit breaker CANNOT be reset from Script/Plain English. This is by design as it was deemed too risky to allow resetting it programmatically. A poorly written program could very quickly cause damage to the flash device.