Delta Electronics VFD-VE Series manual C3H, A1H, Code

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:
		Explanation
	Exception
	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.

04Slave 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 by C language.

#include<stdio.h>

#include<dos.h>

#include<conio.h>

#include<process.h>

#define PORT 0x03F8 /* the address of COM1 */ /* the address offset value relative to COM1 */ #define THR 0x0000

#define RDR 0x0000 #define BRDL 0x0000 #define IER 0x0001 #define BRDH 0x0001 #define LCR 0x0003 #define MCR 0x0004 #define LSR 0x0005 #define MSR 0x0006 unsigned char rdat[60];

/* read 2 data from address 2102H of AC drive with address 1 */ unsigned char tdat[60]={':','0','1','0','3','2','1','0',’2', '0','0','0','2','D','7','\r','\n'}; void main(){

int i;

4-146 Revision August 2008, 03VE, SW V2.04