Delta Electronics VFD-EL manual 09.03, Ascii mode

			Chapter 4 Parameters
09.03	Time-out Detection		Unit: 0.1
	Settings	0.0 to 120.0 sec	Factory Setting: 0.0

0.0Disable

If Pr.09.03 is not equal to 0.0, Pr.09.02=0~2, and there is no communication on the bus during the Time Out detection period (set by Pr.09.03), “cE10” will be shown on the keypad.

09.04Communication Protocol

Factory Setting: 0

Settings	0	Modbus ASCII mode, protocol <7,N,2>
	1	Modbus ASCII mode, protocol <7,E,1>
	2	Modbus ASCII mode, protocol <7,O,1>
	3	Modbus RTU mode, protocol <8,N,2>
	4	Modbus RTU mode, protocol <8,E,1>
	5	Modbus RTU mode, protocol <8,O,1>
	6	Modbus RTU mode, protocol <8,N,1>
	7	Modbus RTU mode, protocol <8,E,2>
	8	Modbus RTU mode, protocol <8,O,2>
	9	Modbus ASCII mode, protocol <7,N,1>
	10	Modbus ASCII mode, protocol <7,E,2>
	11	Modbus ASCII mode, protocol <7,O,2>

1. Control by PC

A VFD-EL can be set up to communicate in 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:

The CPU will be about 1 second delay when using communication reset. Therefore, there is at least 1 second delay time in master station.

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

Revision August 2008, 2ELE, V1.02 4-85