Chapter 4 Parameters|
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 4-127
STX ‘:’ Address 01H
‘0’ Function 86H
Address Low
Address High
‘1’ Exception code 02H
‘8’ CRC CHK Low C3H
Function Low
Function High
‘6’ CRC CHK High A1H
‘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>
