hpmont HD20 Series User Manual

Shenzhen Hpmont Technology Co., Ltd Appendix B Communication Protocol
HD20 Series Inverters User Manual －153－
6. Protocol Function
1) Supported function
MODBUS protocol supports the below parameter operation:
Function code Instructions
0x03 To read the inverter’s function parameters and parameters in operating status
0x06 To rewrite function parameter (whether can be saved by F17.09 at power off) or
control parameter of single inverter
0x08 Circuit diagnosis
0x41 To rewrite function parameter (cannot be saved at power off) or control parameter
of single inverter
0x42 Function parameters management
0x10 To rewrite function parameter (whether can be saved by F17.09 at power off) or
control parameter of certain inverters
0x43 To rewrite function parameter (can be saved at power off) or control parameter of
certain inverters
If the operation command fails, the response is fault code. For instance, continuously read 13
function codes from F00.00 then the return frame will be as follows:
Address Parameter Error code Checksum
0x01 0x83 0x03 0x01 0x31
The fault code is the same as (function parameter
＋
0x80), and its instruction is as follows:
Exception code Instructions
0x1 Illegal function parameters.
0x2 Illegal register address.
0x3 Data fault. Data is beyond the upper/lower limit.
0x4 Slave operation fails (including fault caused by data invalid).
0x16
Unsupported operation (unsupported to read the attributes, factory default and
upper/lower limit for the control parameter and status parameter).
0x17 The register number of command frame is fault.
0x18
Incorrect information frame, including incorrect information length and incorrect
checking.
0x20 Parameters cannot be modified.
0x21 Parameters are unchangeable when the inverter is in running status.
0x22 Parameters are protected by password.
B

hpmont HD20 Series Specifications

General

Brand	hpmont
Model	HD20 Series
Category	Inverter
Language	English