Specifications

Chapter7CommunicationProtocolVFD‐G7SeriesFrequencyInverterOperationManual

164
Slave
address
Functi
on
code
Parameter
address
high byte
Parameter
address
low byte
Data
high
byte
Dat
a
low
byte
CRC
Parity bit
high byte
CRC
Parity bit
high byte
01 06 00 0B 01 2C CB 45
7.3.5 Abnormal Responding Function Code
（1）Abnormalrespondingform
Forthenormalresponse,thefrequencyinverterfeedbacktouppermachine,according
totheform4.3.1and4.3.2.
For the abnormal response, the frequency inverter return to the abnormal response
formasfollows;
Slave
address
Function code +80H Abnormal
code
CRC Parity bit
high byte
CRC Parity
bit high byte
（2）Themeaningofabnormalcode：

Modbus abnormal code
Code Name Meaning
01H Illegal function
The received function code from PC is not allowed
operation；the slave device handles the requirement in
the wrong state
02H
Illegal data
address
The required address of the PC is not allowed;
especially, register address and the number of bytes
transmitted combination is invalid.
03H
Illegal data
value
There are not allowed value in the receiving data field.
Note: It is never meaning that there is a value
exceeded the application’s expectation in the data
items submitted to store.
06H
The slave device
is busy
The drive is busy(E2PROM is storing)