PROFIBUS
• 27
Fieldbus Dependent I/O Module
PROFIBUS DP
The identification bytes contain information about the design and structure of
the unit inputs and outputs.
Bit
Meaning
7
6
5
4
3
2
1
0
0
0
0
...
1
0
0
0
...
1
0
0
1
...
1
0
1
0
...
1
Data length
1 byte or word
2 bytes or words
3 bytes or words
...
16 bytes or words
0
0
1
1
0
1
0
1
Input and output
spec. identification formats
Input
Output
Input and output
0
1
Format
0 = Byte structure
1 = Word structure
0
1
Consistence over
Byte or word
Total length
7.5 Diagnosis
The slave diagnosis of the I/O module provides 6 Byte standard diagnosis and
7 Byte device status diagnosis.
Byte
Information
Meaning
0
Station status 1
1
Station status 2
2
Station status 3
3
Master address
Standard diagnosis see EN 50170 Vol. 2
4
Manufacturer code High Byte
5
Manufacturer code Low Byte
6
0
0
0
0
0
1
1
1
Diagnostic header
(7 Byte ext. Diagnostic incl. header)
7
0
0
0
0
DS4 DS3 DS2 DS1
diagnostic bit
(0=no error, 1=error)
8
0
0
0
0
0
0
0
0
reserved ( ever 0)
9
0
0
0
0
0
0
0
0
reserved ( ever 0)
10
0
0
0
0
0
0
0
0
reserved ( ever 0)
11
0
0
0
0
0
0
0
0
reserved ( ever 0)
12
0
0
0
0
0
0
0
0
reserved ( ever 0)
