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App 3-4

3. Error code

ASCII Mode RTU Mode

STX ‘:’

SLAVE Address

02H

‘0’ Function 83H

Address

‘1’

Exception

code

52H

‘8’ High C0H

Function

‘6’

CRC-16

Low CDH

‘5’

Exception

code

‘1’

‘2’

LRC Check

‘8’

‘CR’

END

‘LF’

Under communication linking, the driver responses the Exception Code and send Function

Code AND 80H to main system if there is error happened.

Error

Code

Description

51

Function Code Error

52

Address Error

53

Data Amount Error

54

DATA Over Range

55

Writing Mode Error