Delta Electronics VFD-VE Series manual RTU mode, Stx

Character					Chapter 4 Parameters
	‘8’	‘9’	‘A’	‘B’	‘C’	‘D’	‘E’	‘F’
ASCII code	38H	39H	41H	42H	43H	44H	45H	46H

RTU mode:

Each 8-bit data is the combination of two 4-bit hexadecimal characters. For example, 64

Hex.

2. Data Format

10-bit character frame (For ASCII):

( 7.N.2)
Start		0	1	2		3	4	5	6	Stop	Stop
	bit									bit	bit
					7-bit character
				10	-bit character frame
( 7.E.1)
Start		0	1	2		3	4	5	6	Even	Stop
	bit									parity	bit
					7-bit character
				10	-bit character frame
( 7.O.1)
Start		0	1	2		3	4	5	6	Odd	Stop
	bit									parity	bit

7-bit character

10-bit character frame

11-bit character frame (For RTU):

( 8.N.2 )
Start		0	1	2		3	4	5	6	7	Stop	Stop
	bit										bit	bit
					8-bit character
				11	-bit character frame
( 8.E.1 )											Even
Start		0	1	2		3	4	5	6	7		Stop
	bit										parity	bit
					8-bit character
				11	-bit character frame
( 8.O.1 )											Odd
Start		0	1	2		3	4	5	6	7		Stop
	bit										parity	bit

8-bit character

11-bit character frame

3. Communication Protocol

3.1 Communication Data Frame:

ASCII mode:

STX	Start character ‘:’ (3AH)
Address Hi	Communication address:
Address Lo	8-bit address consists of 2 ASCII codes
Function Hi	Command code:
Function Lo	8-bit command consists of 2 ASCII codes

Revision August 2008, 03VE, SW V2.04 4-139