Parameter Description
Parameter Description
69
(2). Normal response
After receiving the query from the computer, the inverter performs the requested function from
the computer and return to the normal function.
(3). Error response
If the inverter receives an invalid function code, address, or data, it will send feedback to the
computer.
The computer designated by address 0 can send a message to all the inverters. All inverters
that receive information from the computer will perform the requested function, but they do
not send feedback to the computer.
2). Communication format
● Main frame transmit the query message to the inverter, and the inverter responds to the message
from the PC. The address and function code will be copied during normal communication. Bit 7 of
the function will be set to 1 (=H80), and Data Byte will be set by the error code if the
communication is abnormal.
● Message form
：
Mode
Start
①
Address
②
Function
③
Data
④
Error check
End
ASCII
H3A
8 Bit
8 Bit
n×8 Bit
2×8 Bit
0D 0A
RTU
>=10ms
>=10ms
Message
Details
①
Address
Setting range: 0~254. 0 is the broadcast address, and address of the inverter
ranges between 1 and 254.
P.36 can set the address of inverter. P.36 must be set for the computer to send
information from the inverter and the inverter sends feedback to the computer.
②
Function
SE2-type inverters have three functions. The inverter operates according to the
command from the computer. The computer set up functions of the table other
than the code, the inverter will send an error feedback to the computer. Response
returned from the inverter in normal response returns to normal function. When
an error feedback is sent, the function code should add H80.
Function Name
Function Code
Details
Read multiple
registers
H03
PCs or PLCs may read straight registers
from inverters.
Write single
register
H06
PCs or PLCs may write a single register
to inverters.
Function
diagnosis
H08
Function diagnosis
(only for communication calibration)
Write multiple
registers
H10
From the PC may write straight registers
to inverter.
③
Data
Data can be changed according to the function code. Data include the start
address, the number of register and the write message.
④
Check Error
ASCII mode is for the LRC checksum and RTU mode is for the CRC checksum.
(In LRC, please refer to the standard Modbus protocol specification for detailed
CRC checksum algorithm instructions).
