Unitronics UMI-B1 UL Series Operation Manual page 120

UMI-B1 UL Series Inverter
START
ADDR
CMD
High bit of sub-function
code
Low bit of sub-function
code
High bit of data content
Low bit of data content
CRC CHK low bit
CRC CHK high bit
END
The RTU response command is:
START
ADDR
CMD
High bit of sub-function
code
Low bit of sub-function
code
High bit of data content
Low bit of data content
CRC CHK low bit
CRC CHK high bit
END
7.3.4 Command code: 10H, continuous writing
Command code 10H means that if the master writes data to the inverter, the data
number depends on the "data number" in the command code. The Max. continuous
reading number is 16.
For example, write 5000 (1388H) to 0004H of the inverter whose slave address is 02H
and 50 (0032H) to 0005H, the frame structure is as below:
The RTU request command is:
START
ADDR
CMD
High bit of write data
Low bit of write data
T1-T2-T3-T4
T1-T2-T3-T4
T1-T2-T3-T4
T1-T2-T3-T4
T1-T2-T3-T4 (transmission time of 3.5 bytes)
118
Communication protocol
01H
08H
00H
00H
12H
ABH
ADH
14H
01H
08H
00H
00H
12H
ABH
ADH
14H
02H
10H
00H
04H