Goodrive10 Series Mini VFD Communication protocol
-100-
Abnormal response code 86H means the abnormal response to writing command 06H; the
fault code is 04H. In the table above, its name is operation failed and its meaning is that the
parameter setting in parameter writing is invalid.
7.3.7 Read/Write operation example
For details about the formats of the read and write commands, see section 7.3.
7.3.7.1 Examples of reading command 03H
Read the state word 1 of the VFD with the address of 01H (see section 7.3.4.2 “Description
of other function addresses in Modbus”). The parameter address of the state word 1 of the
VFD is 2100H.
The command sent to the VFD:
Read
command
VFD
address
CRC check
Parameter
address
Data quantity
01 03 21 00 00 01 8E 36
If the response message is as below:
Read
command
Number
of bytes
Data content
CRC check
VFD
address
01 03 02 00 03 F8 45
The data content is 0003H. From the table 1, the VFD stops.
Watch “the current fault type” to “the previous 5 times fault type” of the VFD through
commands, the corresponding function code is P07.27–P07.32 and corresponding
parameter address is 071BH–0720H(there are 6 from 071BH).
The command sent to the VFD:
VFD
address
Read
command
Start
address
6 parameters in total
CRC check
03 03 07 1B 00 06 B5 59
If the response message is as below:
VFD
address
Read
command
Number of
bytes
Type of
last fault
Type of
current fault
Type of last
but one fault
CRC check Type of last
but two fault
Type of last
but three fault
Type of last
but four fault
03 03 0C 00 23 00 23 00 23 00 23 00 2300 23 5F D2
See from the returned data, all fault types are 0023H (decimal 35) with the meaning of
maladjustment (STo).
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