Goodrive350A series high-performance multifunction VFD
Communication
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written is determined by "Data count", and a maximum of 16 pieces of data can be written.
For example, to write 5000 (1388H) and 50 (0032H) respectively to 0004H and 0005H of the VFD
whose slave address is 02H, the frame structures are described in the following.
RTU master command (sent from the master to the VFD):
START
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
ADDR
02H
CMD
10H
High-order bit of data writing address
00H
Low-order bit of data writing address
04H
Data count high-order bit
00H
Data count low-order bit
02H
Number of bytes
04H
Content high-order bit of 0004H
13H
Content low-order bit of 0004H
88H
Content high-order bit of 0005H
00H
Content low-order bit of 0005H
32H
CRC low-order bit
C5H
CRC high-order bit
6EH
END
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
RTU slave response (sent from the VFD to the master)
START
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
ADDR
02H
CMD
10H
High-order bit of data writing address
00H
Low-order bit of data writing address
04H
Data count high-order bit
00H
Data count low-order bit
02H
CRC low-order bit
C5H
CRC high-order bit
6EH
END
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
9.4.5 Data address definition
This section describes the address definition of communication data. The addresses are used for
controlling the running, obtaining the status information, and setting function parameters of the VFD.
