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iDrive2 inverters Communication protocol
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RTU slave response message (from the inverter to the master)
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
02H
CMD
06H
High bit of writing data address
00H
Low bit of writing data address
04H
High bit of data content
13H
Low bit of data content
88H
CRC CHK low bit
C5H
CRC CHK high bit
6EH
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
Note:
section 10.2 and 10.3 mainly describe the command format, and the detailed application will be mentioned
in 10.8 with examples.
7.3.3 Command code 08H for diagnosis
Meaning of sub-function codes
Sub-function Code
Description
0000
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.
The RTU request command is:
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
01H
CMD
08H
High byte of sub-function code
00H
Low byte of sub-function code
00H
High byte of data content
12H
Low byte of data content
ABH
Low byte of CRC
ADH
High byte of CRC
14H
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
The RTU response command is:
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
01H
CMD
08H
High byte of sub-function code
00H
Low byte of sub-function code
00H
High byte of data content
12H
Low byte of data content
ABH
Low byte of CRC
ADH
High byte of CRC
14H
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
7.3.4 The definition of data address
The address definition of the communication data in this part is to control the running of the inverter and get the
state information and relative function parameters of the inverter.