SYRUNS SY5000 series, User Manual, Page: 110 / 115

User Manual of SY5000 series AC Drive MODBUS communication protocol
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LRC CHK
‘7’
‘7’
END
CR
LR
RTU mode
：
Address 01H
Function 86H
Exception code 02H
CRC CHK Low C3H
CRC CHK High A1H
b) Meaning of fault code
：
Fault code Description
01
Function code fault
：
inverter only identify functions of 03H, 06H, 08H
02
Command address error
Address inverter does not exist in the command.
03
Command content is wrong:
Command content is out of range, e.g.: when write parameters,
command parameter value are beyond limits.
04
Command can not be implemented.
Inverter can not perform the command, e.g.: command modifies read-
only data or parameter.
09
Check code error
Check byte of command data frame is not correct.
12
Command data is too short.
(
less than 17 bytes at ASCII mode, RTU less than 8 bytes at RTU
mode.
)
13
Command data is too long,
total bytes is not beyond 27 bytes in ASCII mode
(
that is to say, the
data bit is not beyond 10 bytes
)，
total bytes is not beyond 12 bytes in RTU mode
(
that is to say, the data
bit is not beyond 4 bytes.
)
15 Error occurs when execute writing command.