4-4 Communication Function The detailed field configuration is shown below. The function code of the exception response is the value of the query function code to which 80h is added. The exception code shows the cause of exception response. Function code Exception code 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 recalculation 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 001Ah) 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. 4-164 Query Exception response 01h 81h 03h 83h 05h 85h 06h 86h 0Fh 8Fh 10h 90h Code Description 01h An unsupported function has been specified. 02h Specified address does not exist. 03h Specified data has an unacceptable format. 21h Data is out of the Inverter's range for writing into the holding register. 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). Set value Description 0000 Motor parameter recalculation 0001 Set value storage Other than the above Motor parameter recalculation and set value storage