250 
the storage address of the first fault, this parameter and its following parameters cannot be changed normally, 
but the parameters before it can be written normally and the error message will be returned.   
2. For some special function codes, 0x06 and 0x41 have the same function, and 0x10 and 0x43 have the 
same function. When operating, power on again after power off, the parameters will be saved. These function 
codes are as show in the following table:   
Function code  Function description 
P00.03  Parameter protection setting 
P02.01 Motor selection 
P09.00~P09.05  Input terminals X1~ X6 function selection 
P02.04  Main reference frequency selection 
P02.06  Main reference & auxiliary reference frequency control 
P13.16 PLC running mode 
P03.00  Rated power of motor 1 
P03.12  Rated power of motor 2 
P03.04  Rated rotating speed of motor 1 
P03.16  Rated rotating speed of motor 2 
P98.06  Drive series selection (manufacturer parameters) 
3. Some control parameters cannot be stored into the nonvolatile memory cell. So for these parameters, the 
command codes 0x41 and 0x06 have the same operation effect, as well as 0x43 and 0x10, that is, write 
operation. Once power on again after power off, the parameters will not be saved. Please refer to the control 
parameter table for details.   
4. Some internal parameters of MV300 drive are reserved, which cannot be modified through the 
communication setting. These parameters are as show in the following table:   
Function code  Function description 
P00.00  Menu mode selection 
P00.06 Parameter copy 
P03.24  Motor parameter auto-tuning 
5. The operation of the host device on the user password 
1) Managing the read/write and function codes of function code parameters of the user password protection 
(except for “read the address of the data displayed” and “display the data switching”).   
2) If the user password is set (P00.01), the host device can access to the function code parameters only after 
“decryption” (write the correct user password to P00.01), but the access to the control parameters and status 
parameters is not restricted by the user password.   
3) The host device cannot set, change or cancel the user password and only the operation panel is able to 
conduct these operations. The writing operation of P00.01 will be valid only in two situations: decrypt with the 
password, and write 0 without the password. In other situations, the invalid operation information will be 
returned.