Delta Electronics AC Motor Drive VFD-EL User Manual

Page 140

Chapter 4 Parameters|

Revision August 2008, 2ELE, V1.02

4-97

‘0’

Exception code

‘2’

‘7’

LRC CHK Low

LRC CHK High

‘7’

END 1
END 0

The explanation of exception codes:

Exception

code

Explanation

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

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

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

Slave device failure:
The AC motor drive is unable to perform the requested action.

Communication time-out:
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.

3.7 Communication 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

#define PORT 0x03F8 /* the address of COM1 */

/* the address offset value relative to COM1 */

#define THR 0x0000

#define RDR 0x0000