11. TROUBLESHOOTING
B–63525EN/02
796
A parity error occurred in the SRAM used to store data such as parameters
and machining programs.
This alarm is issued if the battery has run down or if the data in the SRAM
is destroyed due to some external cause. Or, the SRAM module,
motherboard, and option PCB may be defective.
The battery is rated 3 V. A battery alarm is issued and “BAT” flashes on
the screen if the voltage of the battery drops to 2.6 V.
If a battery alarm is issued, replace the battery with a new one promptly.
Perform a memory all clear operation, then start up the CNC.
Alternatively, if a backup of the data in the SRAM has been made, use the
backup to restore the data. To back up and restore the data in the SRAM,
use the boot system.
If memory all clear or the restoration of the data with a backup does not
solve the problem, replace the FROM/SRAM module.
After replacing the FROM/SRAM module, perform a memory all clear
operation and start up the CNC. All the data must be re–loaded.
If a backup is available, restore the data using the backup, then start up
the CNC.
If any of the above actions does not solve the problem, replace the
motherboard.
11.27
ALARMS 910 AND
911 (SRAM PARITY)
Causes and actions
D Checking the battery
D Performing memory all
clear
D Replacing the
FROM/SRAM module
D Motherboard