INVT Goodrive35 Series User Manual

Goodrive35 Series Closed-loop Vector Control VFD Communication protocol
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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:
Read
command
VFD
address
CRC check
Parameter
address
Data quantity
01 03 21 00 00 01 8E 36
Assume that the following response is returned:
Read
command
Number
of bytes
Data content
CRC check
VFD
address
01 03 02 00 03 F8 45
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:
VFD
address
Read
command
Start
address
6 parameters in total
CRC check
03 03 07 1B 00 06 B5 59
Assume that the following response is returned:
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
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.

INVT Goodrive35 Series Specifications

General

Brand	INVT
Model	Goodrive35 Series
Category	Controller
Language	English