Delta Electronics VFD-VL manual Code Description, Ascii mode, RTU mode

				Chapter 4 Parameters
09-04	Communication Protocol
Control	VF	VFPG	SVC FOCPG TQCPG FOCPM	Factory Setting: 13
mode
	Settings	0	Modbus ASCII mode, protocol <7,N,1>

1Modbus ASCII mode, protocol <7,N,2>

2Modbus ASCII mode, protocol <7,E,1>

3Modbus ASCII mode, protocol <7,O,1>

4Modbus ASCII mode, protocol <7,E,2>

5Modbus ASCII mode, protocol <7,O,2>

6Modbus ASCII mode, protocol <8,N,1>

7Modbus ASCII mode, protocol <8,N,2>

8Modbus ASCII mode, protocol <8,E,1>

9Modbus ASCII mode, protocol <8,O,1>

10Modbus ASCII mode, protocol <8,E,2>

11Modbus ASCII mode, protocol <8,O,2>

12Modbus RTU mode, protocol <8,N,1>

13Modbus RTU mode, protocol <8,N,2>

14Modbus RTU mode, protocol <8,E,1>

15Modbus RTU mode, protocol <8,O,1>

16Modbus RTU mode, protocol <8,E,2>

17Modbus RTU mode, protocol <8,O,2>

1. Control by PC or PLC

A VFD-VL can be set up to communicate on Modbus networks using one of the following modes:

ASCII (American Standard Code for Information Interchange) or RTU (Remote Terminal Unit). Users can select the desired mode along with the serial port communication protocol in Pr.09-04.

Code Description:

ASCII mode:

Each 8-bit data is the combination of two ASCII characters. For example, a 1-byte data:

64 Hex, shown as ‘64’ in ASCII, consists of ‘6’ (36Hex) and ‘4’ (34Hex).

Character	‘0’	‘1’	‘2’	‘3’	‘4’	‘5’	‘6’	‘7’
ASCII code	30H	31H	32H	33H	34H	35H	36H	37H
Character
	‘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

Revision Nov. 2008, VLE1, SW V1.03 4-87