IAI America ASEL User Manual

Page 87

Part 1 Installation

Chapter 5 Maintenance

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 ASEL 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

Always follow the procedure below when replacing the system-memory backup battery:

Note: If the system-memory backup battery is disconnected while other parameter No. 20, “Backup

battery installation function type” is still set to “2” (Installed), the data stored in the SRAM will

be lost.

So that the position data can be restored after an accidental loss from the SRAM, save the

position data to a file using the PC software before disconnecting the battery.

For the method to save the position data to a file, refer to 6, “Position Data Edit Window” in

the X-SEL PC Software Operation Manual.

(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.