Goodrive350-19 series VFD Communication protocols
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For example, to write 5000 (1388H) to 0004H of the VFD whose address is 02H, the frame structures
are described in the following.
RTU master command (sent from the master to the VFD):
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
MSB of data writing address
LSB of data writing address
MSB of to-be-written data
LSB of to-be-written data
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
RTU slave response (sent from the VFD to the master):
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
MSB of data writing address
LSB of data writing address
MSB of to-be-written data
LSB of to-be-written data
T1-T2-T3-T4 (time gap with a min. length of
3.5 bytes)
Note: Sections 10.4.1 and 10.4.2 mainly describe the command formats. For the detailed application,
see the section 10.4.7.
10.4.3 Command code 08H, diagnosis
Sub-function code description:
Return data based on query requests
For example, to query about the circuit detection information about the VFD whose address is 01H,
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