Appendix C Communication Protocol Shenzhen Hpmont Technology Co., Ltd
―188― HD30 Series Inverters User Manual
The function parameter characteristics are 2-byte, with definition shown as below:
Characteristics (Bit) Value Definition
Bit0
0B To modify the upper limit as per character restriction.
1B To modify the upper limit as per 4-byte restriction.
Bit2-Bit1
00B without decimal fraction
01B 1 decimal fraction
10B 2 decimal fraction
11B 3 decimal fraction
Bit5-Bit3
001B To display length 1
010B To display length 2
011B To display length 3
100B To display length 4
101B To display length 5
Reserved
Bit7-Bit6
00B Actual parameters, unchangeable
01B Changeable
10B Unchangeable in running status
11B
Set by the manufacturer. The users are not allowed to
make any modification.
Bit12-Bit8
00000B Without char
00001B Unit is Hz
00010B Unit is A
00011B Unit is V
00100B Unit is rpm
00101B Unit is %
Reserved
Bit15-Bit13 Manufacturer reserved