Siemens Simatic 6ES7 157-0AD81-0 A0 Series Manual page 114

Diagnostics Using the User Program
10.4.3 Evaluation of the diagnostic data
The relevant diagnostic data in DB 10 have the following meanings:
Module diagnosis (overview of the slots of slaves with a diagnosis)
7 6 5 4
DB10.DBB7:
0 0
DB10.DBB8:
0 0
What is the status of the configured slots (modules)?
7 6 5 4
DB10.DBB41: 0 1
DB10.DBB42: 0 0
7 6 5 4
DB10.DBB43:
0 0
DB10.DBB44: 0 0
10-20
3 2 1 Bit no.
0
1 0 1 1 0 0
Slave 4 occupies 2 slots
Slave 8 occupies 7 slots;
in this case, header module and modules 1 to 5;
module 1 and 3 report diagnosis
0 0 0 0 0 0
Slave 8: module 6
Slave 12 occupies 3 slots
Slave 20 occupies 4 slots
3 2 1
0 Bit no.
1 1 0 0 0 0
Slave 4; slot 1: slave OK
Slave 4; slot 2: module OK
Slave 8; slot 1: slave faulty
Slave 8; slot 2: module faulty
0 0 1 0 0 0
Slave 8; slot 3: module OK
Slave 8; slot 4: incorrect module
Slave 8; slot 5: module OK
Slave 8; slot 6: module OK
3 2 1
Bit no.
0
0 0 0 0 0 0
Slave 8; slot 7: module OK
Slave 12; slot 1: slave OK
Slave 12; slot 2: module OK
Slave 12; slot 3: module OK
0 0 0 0 0 0
Slave 20; slot 1: slave OK
Slave 20; slot 2: module OK
Slave 20; slot 3: module OK
Slave 20; slot 4: module OK
DP/PA Link and Y Link Bus Couplings
A5E00193841-01 1