INVT GD300-01A, Operation Manual

Page: 177 / 187

Goodrive300-01A series VFD for air compressor Communication protocol
-171-
Sub-function code Description
0000 Return to inquire information data
Definition of data address
The address definition of communication data is used to control VFD operations, obtain VFD state
information and set function parameters.
(1) Rules for presentation of function code address
The parameter address occupies 2 bytes with the most significant byte (MSB) in the front and the
least significant byte (LSB) in the behind. The ranges of the MSB and LSB are: MSB
—00 – ffH;
LSB
—00 – ffH. The MSB is the group number before the radix point of the function code and the LSB
is the number after the radix point, but both the MSB and the LSB should be converted into hex. For
example P05.06, the group number before the radix point of the function code is 05, then the MSB of
the parameter is 05, the number after the radix point is 06, then the LSB of the parameter is 06, and
the function code address is 0506H in hex. Similarly, the parameter address of P10.01 is 0A01H.
(2) Address description of other Modbus functions
The address definition of communication data is used to control VFD operations, obtain VFD state
information and set function parameters.
Table D-1 Other function parameters
Function
description
Address
definition
Data meaning
R/W
characteristics
Communication
control
command
2000H
0001H: Forward running
R/W
0002H: Reverse running
0003H: Forward jogging
0004H: Reverse jogging
0005H: Stop
0006H: Coast to stop (emergency stop)
0007H: Fault reset
0008H: Jogging stop
Address of the
set value of
communication
2001H
The set communication frequency (0
–
Fmax (unit: 0.01Hz))
R/W
2002H
PID reference, range (0
–1000, 1000
corresponds to 100.0%)
2003H
PID feedback, range (0
–1000, 1000
corresponds to 100.0%)
R/W
2004H
The set torque value (-3000
–3000, 1000
corresponds to 100.0% of the rated motor
current)
R/W
2005H The set value of upper limit frequency of R/W