Command Code: 08H, Diagnosis Function - INVT Goodrive3000 Series Operation Manual

Goodrive3000 series medium voltage VFD
For example, write 5000 (1388H) to 0004H from the VFD with the address of 02H, the frame structure is
as follows:
RTU master command message (from the master to the VFD)
START
ADDR
CMD
High bit of writing data address
Low bit of writing data address
High bit of data content
Low bit of data content
CRC low bit
CRC high bit
END
RTU slave response message (from the VFD to the master)
START
ADDR
CMD
High bit of writing data address
Low bit of writing data address
High bit of data content
Low bit of data content
CRC low bit
CRC high bit
END
Note: Sections 8.4.1 and 8.4.2 mainly describe the command formats, and the detailed application will be
mentioned in 8.4.7 Example of writing and reading with examples.

8.4.3 Command code: 08H, diagnosis function

Meaning of sub-function codes:
Sub-function code
0000
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
Description
Return to inquire information data
-253-
MODBUS protocol
02H
06H
00H
04H
13H
88H
C5H
6EH
02H
06H
00H
04H
13H
88H
C5H
6EH