IAI America XSEL-QX - Manual (Page 135)

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Part 3 Controller Data Structure
3. Points to Note
Point to note when transferring data and writing to the flash memory
Never turn off the main power while data is being transferred or written to the
flash memory. The data will be lost and the controller operation may be disabled.
Point to note when saving parameters to a file
The encoder parameters are stored in the EEPROM of the actuator’s encoder itself (unlike other
parameters, they are not stored in the EEPROM of the controller). The encoder parameters will be
read from the encoder’s EEPROM to the controller when the power is turned on or upon software
reset.
Therefore, if the parameters are saved to a file after turning on the controller (or restarting it via a
software reset) without an actuator (encoder) connected, the encoder parameters saved to the file
will become invalid.
Point to note when transferring a parameter file to the controller
When a parameter file is transferred to the controller, the encoder parameters will be transferred to
the EEPROM of the encoder (excluding manufacturing/function information).
Therefore, if the parameter file transferred to the controller has been read from a controller that was
started without an actuator connected, invalid encoder parameters will be written to the encoder’s
EEPROM (provided that an actuator is connected to the controller to which the file was transferred).
When saving the parameters to a file, do so with an actuator connected to the controller.
Notes on increased positions
On controllers with increased memory size (with gateway function), the number of position data has
been increased to 20000.
Accordingly, take note of the following points:
* When the backup memory is used (other parameter No. 20 = 2), position data will be saved in the
battery backup memory for position Nos. 1 to 10000, and in the flash ROM of the main CPU for
position Nos. 10001 to 20000. Accordingly, turning off the power or performing a software reset
without writing the data to the flash ROM will result in loss of data of position Nos. 10001 to 20000.
When the power is turned on again, the effective data last written to the flash ROM will be loaded.
To save the above position data, always write the data to the flash ROM. Also note that when the
backup memory is not used (other parameter No. 20 = 2), all position data of Nos. 1 to 20000 will
be saved in the flash ROM of the main CPU. To save the position data, also write the data to the
flash ROM.