Delta MS300 Series User Manual page 803

Appendix A. Modbus ProtocolMS300
Function Name
Frequency value after
addition and
subtraction of master
and auxiliary
frequency
A-5 Exception Response
When the drive is using the communication connection, if an error occurs, the drive responds to the error
code and sets the highest bit (bit 7) of the command code to 1 (function code AND 80H) then responds
to the control system to signal that an error occurred.
If the keypad displays "CE-XX" as a warning message, "XX" is the error code at that time. Refer to the
table of error codes for communication error for reference.
STX
Address
Function
Exception code
LRC Check
END
The explanation of exception codes:
Error code
1
2
3
4
Attribute
Modbus
(Function Size
Address
Code)
2234H R(03H)
ASCII mode
':'
'0'
'1'
'8'
'6'
'0'
'2'
'7'
'7'
CR
LF
Function code is not supported or unrecognized.
Address is not supported or unrecognized.
Data is not correct or unrecognized.
Failure to execute this function code
Display the frequency value after addition and subtraction of
master and auxiliary frequency
Address
Function
Exception code
CRC Check Low
CRC Check High
Explanation
794
Description
RTU mode
01H
86H
02H
C3H
A1H