Structure Of Diagnostic Message; Structure Of Diagnosis - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

Diagnostics and Error Handling
8.2.3

Structure of Diagnosis

Introduction
The structure of the diagnostic message conforms with the PROFIBUS-DP
standard.
Note
The structure of the diagnostic message described below does not apply to a
default start-up (refer to section 8.2.9).
Structure for The diagnostic message for the IM308C contains 26 bytes of data. The struc-
IM 308C
ture of the complete diagnosis is shown in Table 8-6.
Table 8-6
0
1
2
3
4
5
6
7
8
9
10
11
12 – 15
16
17
18
19
20 – 25
8-10

Structure of diagnostic message

Byte(s)
Station status 1
Station status 2
Station status 3
Station number, DP master
Manufacturer ID (801B
Header and length of module diagnosis
Module diagnosis
Header and length of first station diagnosis
Length of S7 area
Reserved
Reserved
Part 1 of diagnostic data
Length of second station diagnosis (ASi-specific part)
Length of S7 area
Reserved
Reserved
Part 2 of diagnostic data.
Contents
)
H
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b