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Chapter 4 Parameters|
Revision August 2008, 2ELE, V1.02 4-97
‘0’
Exception code
‘2’
‘7’
LRC CHK Low
LRC CHK High
‘7’
CR
END 1
END 0
LF
The explanation of exception codes:
Exception
code
Explanation
01
Illegal function code:
The function code received in the command message is not
available for the AC motor drive.
02
Illegal data address:
The data address received in the command message is not
available for the AC motor drive.
03
Illegal data value:
The 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.
10
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<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