TECHTOP TD20 Series, Руководство по эксплуатации продукта

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TD20 Series VFD Communication Protocol
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Low bit of data content ABH
CRC CHK low bit ADH
CRC CHK high bit 14H
END T1-T2-T3-T4
7.3.4 Command code: 10H, continuous writing
Command code 10H means that if the master writes data to the VFD, 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 VFD 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
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
MSB of write data
00H
LSB of write data
04H
MSB of data number
00H
LSB of data number 02H
LSB of CRC C5H
MSB of CRC 6EH
END T1-T2-T3-T4 (transmission time of 3.5 bytes)
7.3.5 The definition of data address
The address definition of the communication data in this part is to control the running of the VFD and get