HV580L Series Frequency Inverter
191
Command code CMD
03H: Read slave parameters
;
06H: Write slave parameters
08H: Loop since detection
DATA
Function code parameter address, function code
parameter number, function code parameter value, etc.
CRC CHK low order
Detection value: CRC value
CRC CHK high order
END
At least 3.5-character time
In the RTU mode, a new frame to at least 3.5 bytes transmission time interval as a start. And then transfer the
data fields in the order: from the machine address, operation command code, data and CRC check words,
each domain bytes are hex 0... 9, A. F. Continuously detect network bus network facilities, including pause
interval of time. When receiving the first field (address information), each network device to decrypt the byte to
determine whether to own. A byte at the end of transmission is complete, and with a 3.5 bytes of transmission
time interval at least to indicate the end of the frame, in the later, can start a new message.
Command code and communication data description
Command code: 03H, read N (Word), maximum continuously read 12 words.
For example the inverter start address P0.02 of the slave machine address 01 continuously reads two
consecutive values.
RTU Host Commands:
ADR
01H
CMD
03H
Start address high order
P0H
Start address low order
02H