4-174
4-4 Communication Function
4
Functions
Saving the Change to the Holding Register (Enter Command)
Even if using the command to write into the holding register (06h) or into the consecutive holding
registers (10h), no change can be saved in the Inverter's memory element. If the Inverter power
shuts off without saving any changes, the holding register returns to the status before the changes
were made. To save the holding register changes in the Inverter's memory element, the "Enter
Command" must be issued according to the following procedure.
When the control parameters are changed, the motor parameters must be re-calculated. In this
case, perform re-calculation with this register.
To issue the Enter command
Write all memory data into the holding register with the write command (06h), and write re-
calculated motor parameters into holding register 0900h. Below are the values to be written into the
holding register.
Note
•The Enter command needs considerable time. Monitor the data writing signal (coil number 0049h)
to check whether the data is being written.
•Since the Inverter's memory element has a limit on the number of rewrites (approx. 100,000 times),
the Inverter life may be shortened if enter commands are frequently used.
EEPROM Write Mode
•If the holding register write command (06h), etc. is used to write "1" into the holding register for
EEPROM write mode (0902h), the EEPROM write mode will become active.
•If data is changed using the holding register write command (06h) after switching to the EEPROM
write mode, the new data is written into both the volatile memory for operation (RAM) and
nonvolatile memory for storage (EEPROM). At the same time, the EEPROM write mode is
cancelled.
•If any command other than the holding register write command (06h) is received after switching to
the EEPROM write mode, the EEPROM write mode is cancelled.
Function code Exception code
Query
Exception
response
Code Description
01h 81h 01h An unsupported function has been specified.
03h 83h 02h Specified address does not exist.
05h 85h 03h Specified data has an unacceptable format.
06h 86h 21h Data is out of the Inverter's range for writing into the holding register.
0Fh 8Fh
22h
The Inverter does not allow this function.
• Has attempted to change the register that cannot be changed
during operation.
• Has issued the enter command during operation (UV).
• Has written into the register during trip (UV).
• Has written into the read-only register (coil).
10h 90h
Set value Description
0000 Motor parameter re-calculation
0001 Set value storage
Other than the above Motor parameter re-calculation and set value storage
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