Delta Electronics VFD-S manual RTU mode Command message

Chapter 5 ParametersVFD-S Series

RTU mode:

Command message:

ADR	01H
CMD	03H
Starting data	21H
address	02H
Number of data	00H
(count by word)	02H
CRC CHK Low	6FH
CRC CHK High	F7H

Response message:

ADR	01H
CMD	03H
Number of data	04H
(count by byte)
Content of address	17H
2102H	70H
Content of address	00H
2103H	00H
CRC CHK Low	FEH
CRC CHK High	5CH

(2) 06H: single write, write single data to register.

Example: writing data 6000(1770H) to register 0100H. AMD address is 01H.

ASCII mode:

Command message:

	STX	‘:’
	ADR 1	‘0’
	ADR 0	‘1’
	CMD 1	‘0’
	CMD 0	‘6’
		‘0’
	Data address	‘1’
		‘0’
		‘0’
		‘1’
	Data content	‘7’
		‘7’
		‘0’
	LRC CHK 1	‘7’
	LRC CHK 0	‘1’
	END 1	CR
	END 0	LF
RTU mode:
	Command message:
	ADR	01H
	CMD	06H
	Data address	01H
		00H
	Data content	17H
		70H
	CRC CHK Low	86H
	CRC CHK High	22H

Response message:

STX	‘:’
ADR 1	‘0’
ADR 0	‘1’
CMD 1	‘0’
CMD 0	‘6’
	‘0’
Data address	‘1’
	‘0’
	‘0’
	‘1’
Data content	‘7’
	‘7’
	‘0’
LRC CHK 1	‘7’
LRC CHK 0	‘1’
END 1	CR
END 0	LF
Response message:
ADR	01H
CMD	06H
Data address	01H
	00H
Data content	17H
	70H
CRC CHK Low	86H
CRC CHK High	22H

Revision August 2008, SE09, SW V2.61 5-67