Siemens Simatic 6ES7 157-0AD81-0 A0 Series Manual page 103

Byte x
Byte x+1
Byte x+2
Byte x+3
Byte x+4
Byte x+5
.
.
.
Byte x+59
Byte x+60
Byte x+61
Byte x+62
Figure 10-4
Start address x is 37 for both S7 standard operation and redundant operation; in
DP standard master operation, it is dependent on which diagnostic blocks are
present (see Table 10-2).
10.2.4 Status message
The status message is part of the station diagnosis and delivers the following
information:
S Underlying slaves that have reported diagnosis
S Underlying slaves that are engaged in data exchange
S State of the IM 157 as master of the underlying PROFIBUS
DP/PA Link and Y Link Bus Couplings
A5E00193841-01 1
7 6 5 4 3 2 1 0
0 0 1 1 1 1 1 1
Length of the diagnostic blockincluding byte x
(= 63 bytes)
Code for station diagnosis
82
H
7 6 5 4 3 2 1 0
4 3 2 1
8 7 6 5
. .
. .
. .
224 223 222 221
228 227 226 225
232 231 230 229
236 235 234 233
The status is encoded by means of two bits for each slot.
00 : "Module OK", valid user data
B
01 : "Module faulty", user data invalid
B
10 : "Incorrect module", user data invalid
B
11 : "No module", user data invalid
B
Slot 1 is assigned to the first configured slave.
Structure of the module status
Diagnostics Using the User Program
Bit no.
Status type: module status
Not applicable
Not applicable
Bit no.
Modules 1 to 4
Modules 5 to 8
.
.
.
Modules 221 to 224
Modules 225 to 228
Modules 229 to 232
Modules 233 to 236
10-9