INVT Goodrive20-EU VFD Series User Manual

Goodrive20-EU series VFD Communication protocol
135
7.5.1 Example of reading command 03H
Example 1: read the state word 1 of the VFD with the address of 01H (refer to the parameter
table of other functions). According to the parameter table, the parameter address of the state
word 1 of the VFD is 2100H.
RTU mode:
The command sent to the VFD:
Read
command
VFD
address
CRC check
Parameters
address
Data number
If the operation succeeds, the response message is as follows:
Read
command
Data
address
Data content
CRC check
VFD
address
ASCII mode:
The command sent to the VFD:
Read
command
VFD
address
LRC
check
Parameters
address
Data
number
If the operation succeeds, the response message is as follows:
Read
command
VFD
address
LRC
check
Data
content
Byte
number
The data content is 0003H. According to the parameter table of other functions, the VFD
stops.
7.5.2 Example of writing command 06H
Example 1: make the VFD with the address of 03H to run forward. According to the parameter
table of other functions, the address of "communication control command" is 2000H and
forward running is 0001. See the table below.
Function
instruction
Address
definition
Data meaning instruction
R/W
characteristics
Communication
control
command
2000H
0001H: forward running
W/R
0002H: reverse running
0003H: forward jogging
0004H: reverse jogging
0005H: stop

INVT Goodrive20-EU VFD Series Specifications

General

Brand	INVT
Model	Goodrive20-EU VFD Series
Category	DC Drives
Language	English