Appendix Communication Protocol GK600 User Manual
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5. Protocol Function
The uppermost function of Modbus is to read and write parameters, and different parameters
determine different operation requests. Parameters operations supported by inverter Modbus
protocol are as shown in the table below:
Appendix Table 4
Parameters
Parameter
Meaning of parameter
0x03
Read drive functional parameters and run status parameters
0x06
Over-write individual drive functional parameters or control
parameters, which are not saved on power loss
0x08
Line diagnosis
0x10
Over-write multiple drive functional parameters or control parameters,
which are not saved on power loss
0x41
Write individual drive functional parameters or control parameters,
and save them to non-volatile storage unit
0x42
Parameter management
Functional parameters, control parameters and status parameters of the drive are all mapped
to read-write register of Modbus. Read-write characteristics and range of parameters comply
with the instructions of user manual of the drive. Group numbers of drive parameters are
mapped as high byte of register address, while in-group indexes are mapped as low byte of
register address. Drive control parameters and status parameters are all virtualized as drive
parameter groups. The corresponding relations between parameter group numbers and their
high bytes of register address are as shown in table below:
Appendix Table 5 High-byte register addresses mapped from
parameter group numbers
Parameter
group
Mapping register
address, high byte
Parameter group
Mapping register
address, high byte
A0
0x00
E1
0x12
A1
0x01
F0
0x13
b0
0x02
F1
0x14
b1
0x03
F2
0x15
b2
0x04
F3
0x16
C0
0x05
F4
0x17
C1
0x06
F5
0x18
C2
0x07
F6
0x19
