IMO SD1 Series - Ascii Mode

SD1 Series Inverters Communication Protocol
-126-
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 follows:
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
Low bit of data 0004H
88H
High bit of data 0005H
00H
Low bit of data 0005H
32H
Low bit of CRC
C5H
High bit of CRC
6EH
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
The RTU response 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
Low bit of CRC
C5H
High bit of CRC
6EH
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
7.3.2 ASCII mode
7.3.2.1 Command code 03H (0000 0011), reading N words (N ≤ 16)
For instance: As for the inverter whose slave address is 01H, the starting address of internal
storage is 0004, read two words continuously, the structure of this frame is listed as below: