Delta Electronics VFD-VE Series manual Data, Start, End

Chapter 4 Parameters

	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)
RTU mode:
	START	A silent interval of more than 10 ms
	Address	Communication address: 8-bit address
	Function	Command code: 8-bit command
	DATA (n-1)	Contents of data:
	to	n×8-bit data, n<=16
	DATA 0
	CRC CHK Low	CRC check sum:
	CRC CHK High	16-bit check sum consists of 2 8-bit characters
	END	A silent interval of more than 10 ms

3.2 Address (Communication Address)

Valid communication addresses are in the range of 0 to 254. A communication address equal to 0, means broadcast to all AC drives (AMD). In this case, the AMD will not reply any message to the master device.

00H: broadcast to all AC drives

01H: AC drive of address 01

0FH: AC drive of address 15

10H: AC drive of address 16

:

FEH: AC drive of address 254

For example, communication to AMD with address 16 decimal (10H): ASCII mode: Address=’1’,’0’ => ‘1’=31H, ‘0’=30H

RTU mode: Address=10H

3.3Function (Function code) and DATA (data characters)

The format of data characters depends on the function code. 03H: read data from register

06H: write single register

08H: loop detection

10H: write multiple registers

The available function codes and examples for VFD-VE are described as follows:

(1) 03H: multi read, read data from registers.

Example: reading continuous 2 data from register address 2102H, AMD address is 01H. ASCII mode:

Command message:		Response message:
STX	‘:’	STX	‘:’
Address	‘0’	Address	‘0’
	‘1’		‘1’
Function	‘0’	Function	‘0’
	‘3’		‘3’
Starting data	‘2’	Number of data	‘0’
address	‘1’	(Count by byte)	‘4’

4-140 Revision August 2008, 03VE, SW V2.04