Delta Electronics VFD-E manual A1H, Exception Explanation Code, Communication program of PC

		Chapter 4 Parameters
STX	‘:’	Address	01H
Address Low	‘0’	Function	86H
Address High	‘1’	Exception code	02H
Function Low	‘8’	CRC CHK Low	C3H
Function High	‘6’	CRC CHK High	A1H
Exception code	‘0’
	‘2’
LRC CHK Low	‘7’
LRC CHK High	‘7’
END 1	CR
END 0	LF

The explanation of exception codes:

Exception	Explanation
code

Illegal function code:

01The function code received in the command message is not available for the AC motor drive.

Illegal data address:

02The data address received in the command message is not available for the AC motor drive.

Illegal data value:

03The data value received in the command message is not available for the AC drive.

04

Slave device failure:

The AC motor drive is unable to perform the requested action.

Communication time-out:

10If 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.

3.7Communication program of PC:

The following is a simple example of how to write a communication program for Modbus ASCII mode on a PC in C language.

#include<stdio.h>

#include<dos.h>

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 4-127