User manual

Appendix 4 MODBUS Communication
231
●Fault Response Error Codes with MODBUS
Error Code Fault Content
01H
Function error
·Unregistered function code, beyond 03H,08H,10H
02H
Register No. error Unrecognized register no.
No register address, register address is 0000.
Read only write-in MODBUS address [0x00FFH] .
Not open the MODBUS address communication function.
(*NOTE 1)
03H
Data length error
No. of data items <1 or > 2
21H
Parameter setting error
Write upper/lower limit error. ( *NOTE2)
22H
Write mode error.
Write data to the parameters that can’t be changed in running
state.( *NOTE 3)
Parameter is protected to be written. Write is disabled for the
register.( * NOTE 4)
Write data to the only read-out register address/
Write data to EEPROM during “CCF3” fault.
23H
Write in date during under voltage.
Save data during under voltage.
24H
While data is saving by keyboard, write communication data.
(During fault reset, power loss or data is saving).
25H CRC check error.( *NOTE 5)
*NOTE 1: Write communication frequency reference to MODBUS addresses 0002H
while P0.01 and P0.02 select other frequency setting modes not serial communication
mode. Set P0.01 or P0.02 as communication function. Write communication run
command to MODBUS address 0001H while P0.04 selects other control mode not
serial communication mode.
* NOTE 2: When the written value is out of the range of upper and the lower limitation
or the associated parameters limitation, MODBUS response error “21H” will be
generated. Moreover, the values of the registers will not be changed.
* NOTE 3: write data when the inverter is in running state. Check the data write-in
possibility in function parameter table. If the data needs to be changed, stop the inverter
first and then change the value of data.
* NOTE 4: Write data when the parameters are protected by parameter PF.01, set PF.01
to zero, then the protected data can be changed.
* NOTE5: CRC16 error check has happened. The inverter will answer with fault code
“25H” for the user debugging.