IAI America PSEL - Manual (Page 83)

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Part 1 Installation
3. Replacement Procedure for System-Memory Backup Battery (Optional)
Backing up the system memory
If the optional system-memory backup battery is installed in the PSEL controller and “Other parameter No.
20: Backup battery installation function type” is set to “2” (Installed), the following SRAM data will be
retained even after the power is turned off:
 Position
data
 SEL global data (flags, integer/real variables, string variables)
 Error
list
For this reason, always follow the procedure below when replacing the system-memory backup battery:
Note: If the system-memory backup battery is removed while other parameter No. 20, “Backup
battery installation function type” is set to “2 (Installed),” above contents in the SRAM will be
lost.
So that the position data can be restored even after the SRAM data has been cleared, save
the position data to a file using the PC software before removing the battery.
For information on how to save position data to a file, refer to 6, “Position Data Edit Window” in
“Operation Manual for X-SEL PC Software.”
(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.
* Be sure to keep the power on from the start of controller restart until the RDY LED lamp on teh controller
illuminates.
(7) Replace the system-memory backup battery. SRAM data will be lost if steps (1) through (6) are not
performed properly.