Example Of Writing And Reading - INVT Goodrive35 Series Operation Manual

Goodrive35 Series Closed-loop Vector Control VFD
The exception response code 86H (generated based on the MSB "1" of the write command 06H)
indicates that it is an exception response to the write command (06H). The error code is 04H. From
the preceding table, we can see that it indicates the error "Operation failure", which means "The
parameter is set to an invalid value in the write operation".

10.4.8 Example of writing and reading

For details about the formats of the read and write commands, see sections 10.4.1 and 10.4.2.
10.4.8.1 Example of reading command 03H
Example 1: Read state word 1 of the VFD whose address is 01H. From the table of other function
parameters, we can see that the parameter address of state word 1 of the VFD is 2100H.
The read command transmitted to the VFD is as follows:
01
VFD
address
Assume that the following response is returned:
01
VFD
address
The data content returned by the VFD is 0003H, which indicates that the VFD is in the stopped state.
Example 2: View information about the VFD whose address is 03H, including "Type of current fault"
(P07.27) to "Type of last but four fault" (P07.32) of which the parameter addresses are 071BH to
0720H (contiguous 6 parameter addresses starting from 071BH).
The command transmitted to the VFD is as follows:
03
VFD
address
Assume that the following response is returned:
03 03 0C 00 23 00 23 00 23 00 23
VFD Read Number of
address command
From the returned data, we can see that all the fault types are 0023H, that is, 35 in the decimal form,
which means the maladjustment fault (STo).
10.4.8.2 Example of writing command 06H
Example 1: Set the VFD whose address is 03H to be forward running. Refer to the table of other
function parameters, the address of "Communication-based control command" is 2000H, and 0001H
indicates forward running, as shown in the following figure.
03 21 00
Parameter
Read
address
command
03
Read
command
03 07 1B
Read
command
Type of
Type of
last fault
bytes current fault
00 01
Data quantity
02 00 03
Number
Data content
of bytes
00 06
Start
6 parameters in total
address
Type of last Type of last
but one fault but two fault
233
Communication protocol
8E 36
CRC check
F8 45
CRC check
B5 59
CRC check
00 23 00 23 5F D2
Type of last Type of last
but three fault
but four fault
CRC check