I) V24/RS232/485-Interface - Basics

3. Protocol settings

The data and command transfer protocol has the following structure:

3.1. Command telegram

1. Byte

STX

 

 

 

 

 

 

2. Byte

DON'T CARE

 

 

 

 

 

 

3. Byte

FUNCT. CODE 1

 

 

 

 

 

 

4. Byte

FUNCT. CODE 2

HEAD

 

 

 

 

5. Byte

FUNCT. CODE 3

 

 

 

 

 

 

6. Byte

FUNCT. CODE 4

 

 

 

 

 

 

7. Byte

BLANK

 

 

 

 

 

 

8. Byte

"K"

VARIABLE DATA

 

 

(number with several

9. Byte

NUMBER

digits possible)

 

 

 

D

 

 

 

 

 

 

A

(other data

 

T

can also disappear,

 

A

depending on the

 

 

function code)

 

 

 

 

n. Byte

ETX

END

 

 

 

 

90003752(1) [AK-Commands] 10/98

AK

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