GD200A series VFD Communication protocol
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9.4.1.2 Command code: 06H
06H (correspond to binary 0000 0110), write one word (Word)
The command means that the master write data to the VFD and one command can write one data
other than multiple dates. The effect is to change the working mode of the VFD.
For example, write 5000 (1388H) to 0004H from the VFD with the address of 02H, the frame
structure is as below:
RTU master command message (from the master to the VFD)
T1-T2-T3-T4(transmission time of 3.5 bytes)
High bit of write data address
Low bit of write data address
T1-T2-T3-T4 (transmission time of 3.5 bytes)
RTU slave response message (from the VFD to the master)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
High bit of writing data address
Low bit of writing data address
T1-T2-T3-T4 (transmission time of 3.5 bytes)
Note: section 9.4.1.1 and 9.4.1.2 mainly describe the command format, and the detailed application
will be mentioned in 9.6 with examples.
9.4.1.3 Command code 08H for diagnosis
Meaning of sub-function codes
Return to inquire information data
For example: The inquiry information string is same as the response information string when the
loop detection to address 01H of driver is carried out.
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