Yaskawa DeviceNet Option Card CM059 - Manual (Page 31)

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Some Parameter Data registers may be written to while the drive is running. These parameters are called run operative
parameters. For a list of these parameters refer to Appendix A of the drive User Manual.
All other Parameter Data registers may only be written to when the drive is stopped. These are called non-run operative
parameters.
If new data is written to any parameter serially, and is not followed by an ‘ENTER’ command, a Busy Write Protected” message
will flash on the Digital Operator display if an attempt is then made to change a parameter using the Digital Operator.
Save Data to EEPROM with the ENTER Command
The ENTER Command can be accomplished in the following way:
„ Perform a SET service on Yaskawa Class 64 Hex, Instance 09 Hex, Attribute 00 Hex
The value ‘0’ should be SET to the ENTER Command attribute.
CAUTION
Use the ENTER Command only when necessary!
The life of the EEPROM on the drive will support a finite number of operations.
This means that the ENTER command can only be used a maximum of 100,000 times to store data in the EEPROM. After
the specified number of operations, the EEPROM may fault (CPF04) requiring the drive control board to be replaced.
CAUTION
The DeviceNet Network parameters do not require the use of the ENTER Command.
They are automatically stored in EEPROM memory. The life of the EEPROM on the option will support a finite number of
operations. This means that the DeviceNet Network parameters can only be changed a maximum of 100,000 times. After the
specified number of operations, the EEPROM may fault,
requiring the option to be replaced.