Siemens Simatic 6ES7 157-0AC80-0 A0 Series, Руководство пользователя

Страница: 101 / 182

Diagnostics Using the User Program
10-7
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Structure of the module diagnosis
The module diagnosis comprises 31 bytes.
Each slave slot occupies one bit. The slaves are arranged in ascending order by
their PROFIBUS addresses.
A bit is set if:
the corresponding slave for the respective slot delivers a module diagnosis, or
the corresponding configured slave is not engaged in data exchange with the
DP master.
Byte 6
The set bit indicates that a slave either reported a diagnosis for the
respective slot or failed.
Bit no.
Length of the diagnostic blockincluding byte 6
(= 31 bytes)
Code for module diagnosis
Byte 7
Byte 8
7
Byte 34
Byte 35
Byte 36
.
.
6 5 4 3 2 1 0
0 1 0 1 1 1 1 1
Bit no. 7 6 5 4 3 2 1 0
Slots 1 to 8 7 6 5 4 3 2 1 8
15 14 13 12 11 10 9 16 Slots 9 to 16
.
. .
. .
.
Slots 217 to 224 223 222 221 220 219 218 217 224
Slots 225 to 232 231 230 229 228 227 226 225 232
Slots 233 to 236 236 235 234 233
Figure 10-3 Structure of the module diagnosis