Salicru CV30, User Manual, Page: 108 / 140

108 - 140 Communication protocol
High bit of sub-function code 00H
Low bit of sub-function code 00H
High bit of data content 12H
Low bit of data content ABH
CRC CHK low bit ADH
CRC CHK high bit 14H
END T1-T2-T3-T4
The RTU response command is:
START T1-T2-T3-T4
ADDR 01H
CMD 08H
High bit of sub-function code 00H
Low bit of sub-function code 00H
High bit of data content 12H
Low bit of data content ABH
CRC CHK low bit ADH
CRC CHK high bit 14H
END T1-T2-T3-T4
7.3.1.4 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 T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR 02H
CMD 10H
High bit of write data
00H
Low bit of write data
04H
High bit of data number
00H
Low bit of data number
02H
Byte number 04H
High bit of data 0004H 13H