Delta Electronics VFD-VL manual Stx, Data

Chapter 4 Parameters

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
DATA (n-1)	Contents of data:
to	Nx8-bit data consist of 2n ASCII codes
DATA 0	n<=16, maximum of 32 ASCII codes
LRC CHK Hi	LRC check sum:
LRC CHK Lo	8-bit check sum consists of 2 ASCII codes
END Hi	End characters:
END Lo	END1= CR (0DH), END0= LF(0AH)

4-88 Revision Nov. 2008, VLE1, SW V1.03