User manual

8-11
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
The diagnostic message for the S7/M7 DP master contains 24 bytes of data.
The structure of the entire diagnosis is shown in Table 8-7.
Table 8-7 Diagnostic message structure for the S7/M7 DP master
Byte(s) S7/M7 DP Master
0 Stations status 1
1 Stations status 2
2 Stations status 3
3 Station number, DP Master
4
Manufacturer ID (801B
H
)
5
6 Header and length of module diagnosis
7 Module diagnosis
8 Module diagnosis
9 Header and length of station diagnosis
10 S7 diagnostic interrupt ID
11 S7 slot
12 Reserved
13 – 16 Part 1 of station diagnostic data (DS 0)
17 – 23 Part 2 of station diagnostic data (DS 1)
Structure for
S7/M7 DP master
Diagnostics and Error Handling