Salicru CV30 User Manual page 107

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
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 CHK low bit
CRC CHK high bit
END
RTU slave response message (from the inverter 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 CHK low bit
CRC CHK high bit
END
7.3.1.3 Command code 08H for diagnosis
Meaning of sub-function codes
Sub-function Code
0000
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
CMD
Communication protocol
T1-T2-T3-T4
02H
06H
00H
04H
13H
88H
C5H
6EH
T1-T2-T3-T4
T1-T2-T3-T4
02H
06H
00H
04H
13H
88H
C5H
6EH
T1-T2-T3-T4
Description
Return to inquire information data
T1-T2-T3-T4
01H
08H
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