V&T E5 Series User Manual page 148

Abnormal codes:
Abnormal
code
0x0T Illegal command
0x0T Illegal data address
Illegal data, data beyond upper limit or
0x03
lower limit
Slave operation failure, the data is in
0x04
the normal range, but it is invalid
Command is valid, and is in process,
0x05 mainly occurs when storing data into
EEPROM
Slave is busy, mainly occurs when
0x06
storing data into EEPROM
4. Function Interpretation
Function 0x03 reads multiple parameters and status words

PDU Part Contents
Request:
Function code
Start address of register
Number of registers
Response:
Function code
Read bytes
Read contents
Function 0x06(0x4T) write single parameter

PDU Part Contents
Request:
Function code
Register address
Register data
Response:
Function code
Register address
Register data
Function 0xT0(0x4T) write multiple parameters

PDU Part Contents
Request:
Function code
Start address of register
Number of register
Bytes of register contents
Register contents
Response:
Function code
Start address of register
Number of register
E5 Series High Performance Universal Inverter
Definition
Appendix A Modbus Communication Protocol
User's Manual
Abnormal
code
Frame error: frame length error, check sum
0xT0
error
0xTT Parameters are unchangeable
Parameter is unchangeable in running
0xTT
status
0xT3 The parameter is protected by password
Run command source is not through
0xT4 communication, Communication command
is not useful
Data Length (Byte)
T
T
T
T
T
T*Number of registers
Data Length (Byte)
T
T
T
T
T
T
Data Length (Byte)
T
T
T
T
T*Number of registers
T
T
T
Definition
Range
0x03
0x0000 ~ 0xFFFF
0x000T ~ 0x00T0
0x03
T*Number of registers
Range
0x06(0x4T)
0x0000 ~ 0xFFFF
0x0000 ~ 0xFFFF
0x06(0x4T)
0x0000~ 0xFFFF
0x0000 ~ 0xFFFF
Range
0xT0(0x4T)
0x0000~0xFFFF
0x000T~0x00T0
T*Number of registers
0xT0(0x4T)
0x0000~0xFFFF
0x000T~0x00T00
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