INVT Goodrive300 Series Operation Manual page 220

Goodrive300 Series VFD
RTU master command message (from the master to the VFD)
High bit of writing data address
Low bit of writing data address
Data content
Data content
Low bit of CRC
High bit of CRC
RTU slave response message (from the VFD to the master)
High bit of writing data address
Low bit of writing data address
High bit of data content
Low bit of data content
Low bit of CRC
High bit of CRC
Note: section 10.2 and 10.3 mainly describe the command format, and the detailed application will be
mentioned in 10.8 with examples.
10.4.3 Command code 08H for diagnosis
Meaning of sub-function codes
Sub-function Code
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.
The RTU request command is:
START
ADDR
High bit of sub-function code
Low bit of sub-function code
START
ADDR
CMD
END
START
ADDR
CMD
END
0000
CMD
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)
Return to inquire information data
T1-T2-T3-T4 (transmission time of 3.5 bytes)
215
Communication protocol
02H
06H
00H
04H
13H
88H
C5H
6EH
02H
06H
00H
04H
13H
88H
C5H
6EH
Description
01H
08H
00H
00H