TECHTOP TD20 Series Product Manual page 105

TD20 Series VFD
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 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
ADDR
CMD
High bit of write data
Low bit of write data
High bit of data number
Low bit of data number
Byte number
High bit of data 0004H
Low bit of data 0004H
High bit of data 0005H
Low bit of data 0005H
Low bit of CRC
High bit of CRC
END
The RTU response command is:
START
ADDR
CMD
MSB of write data
LSB of write data
MSB of data number
LSB of data number
LSB of CRC
MSB of CRC
END
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
ABH
ADH
14H
T1-T2-T3-T4
T1-T2-T3-T4 (transmission time of 3.5 bytes)
02H
10H
00H
04H
00H
02H
04H
13H
88H
00H
32H
C5H
6EH
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
02H
10H
00H
04H
00H
02H
C5H
6EH
T1-T2-T3-T4 (transmission time of 3.5 bytes)
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Communication Protocol