IAI America XSEL-QX - Manual (Page 119)

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Part 1 Installation
3. Replacement Procedure for System Memory Backup Battery
Backing up the system memory
If “Other parameter No. 20, Backup battery installation function type” is set to “2” (installed), the following
SRAM data in the X-SEL Controller will be backed up by the system memory backup battery on the panel
board:
x Position data (Position Nos. 1 to 10000 for a controller with increased memory size (with gateway
function))
x SEL global data (flags, integer/real variables, string variables)
x Error
lists
x User-data backup memory of the controller with increased memory size (with gateway function)
Therefore, the above SRAM data will be destroyed if the system memory backup battery is removed when
“Other parameter No. 20, Backup battery installation function type” is set to “2” (installed). For this reason,
always follow the procedure below when replacing the system-memory backup battery:
(1) Turn on the controller power.
(2) Record (write down) the current setting of “Other parameter No. 20, Backup battery installation
function type” (this will be used when reverting the parameter to its original setting following the
replacement of system memory backup battery).
(3) If the PC software is installed on your PC, save the position data to a file using the PC software. The
data will be used in case the SRAM data saved to the flash ROM fails.
(4) Change “Other parameter No. 20, Backup battery installation function type” to “1” and transfer the
setting to the controller, and then perform a flash ROM write (the point data will be saved to the flash
ROM).
* Confirm that the flash ROM writing process has completed.
(5) Perform a software reset to restart the controller (the SEL global data and error lists will be saved to
the special area in the flash ROM).
(6) When the controller has been restarted, turn off the power.
* Once the controller has been restarted, be sure to keep the power on until the initialization sequence number
is no longer displayed on the panel window (while “InXX” is displayed following “8888.” XX indicates a
number).
(7) Replace the system memory backup battery (SRAM data will be destroyed if steps 1 through 6 are
not performed properly).