V&T E5-H Series User Manual page 123

Abnormal
code
0x01
0x02
0x03
0x04
0x05
0x06
4. Function Interpretation
Function 0x03 reads parameters and status words of multiple function code parameters of the inverter.
PDU Part Contents
Request:
Function code
Initial address
register
Number of registers
Response:
Function code
Read bytes
Read contents
Function 0x06(0x41) rewrites single function code or control parameter of the inverter and save it upon
power failure (not save).
PDU Part Contents
Request:
Function code
Register address
Register data
Response:
Function code
Register address
Register data
Note: if change function code frequently, such as change setting frequency repeat, suggest use 0x41
command is better than 0x06, prevent from damage inner EEPROM.
116
E5−H High Performance Universal Inverter
Definition
Illegal function code
Illegal data address
Illegal data, data beyond
high/low limits
Slave operation failure, the
data is within the range of
high/low limits, but it is
disabled.
Order valid, in process, mainly
occurs upon storing data into
EEPROM
Slave busy, mainly occurs
upon storing data into
EEPROM
Data Length (Byte)
1
of
2
2
1
1
2*Number of registers
Data Length (Byte)
1
2
2
1
2
2
Appendix A Modbus Communication Protocol
User Manual
Abnormal
code
Frame error: frame length error,
0x20
check error
0x21 Parameters are unchangeable.
Unchangeable upon operation
0x22
of parameters
Password protected for
0x23
parameters
Non− host computer equipment
0x24 control, invalid host computer
command
0x0000 ~ 0xFFFF
0x0001 ~ 0x0010
2*Number of registers
0x0000 ~ 0xFFFF
0x0000 ~ 0xFFFF
0x0000~ 0xFFFF
0x0000 ~ 0xFFFF
Definition
Range
0x03
0x03
Range
0x06(0x41)
0x06(0x41)