Astraada AS24DRV4075, Руководство по эксплуатации

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Astraada DRV-24 frequency inverters Communication protocol
99
CRC occupies 2 bytes with the fact that the high bit is in the front and the low bit is in the behind.
7.3.1.2 Command code:06H
06H(correspond to binary 0000 0110), write one word(Word)
The command means that the master write data to the inverter and one command can write one
data other than multiple dates. The effect is to change the working mode of the inverter.
For example, write 5000 (1388H) to 0004H from the inverter with the address of 02H, the frame
structure is as below:
RTU master command message (from the master to the inverter)
START T1-T2-T3-T4
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
RTU slave response message (from the inverter to the master)
START T1-T2-T3-T4
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
Note: section 10.2 and 10.3 mainly describe the command format, and the detailed application will
be mentioned in 10.8 with examples.
7.3.1.3 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