IAI XSEL - Replacement Procedure for System-Memory Backup Battery

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Part 1 InstallationChapter 9 Maintenance
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 XSEL Controller will be backed up by the system-memory backup battery on the panel board:
Position data (positions from Nos. 1 to 10000 in the case of a controller with expanded memory (with gateway
function))
SEL global data (flags, integer/real variables, string variables)
Error lists
Content of the user-data backup memory in the controller with expanded memory (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 in your PC, save the position data to a file using the PC software. The data
will be used as a backup 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.)