Structure Of Profibus Dp Slave Diagnostics - Siemens SIMATIC NET CP 142-2 Manual

B8976111/02

3.3.1.2 Structure of PROFIBUS DP Slave Diagnostics

When a diagnostic interrupt is triggered on the CP 142-2, the BM 141/BM 142 reports PROFIBUS DP
slave diagnostic information with the following structure (for more detailed information, refer to /4/):
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
Byte 10
Byte 11
Byte 12
Byte 13
Byte 14
Byte 15
Byte 16
Byte 17
Byte 18
Byte 19
Byte 20
Byte 21
Byte 22
Byte 23
Byte 24
Byte 25
Byte 26
Byte 27
Byte 28
Figure 3-2 Structure of the DP Slave Diagnostic Information
  To support special masters, the BM 141/BM 142 can also be configured so that the slave
diagnostic information only includes bytes 0 to 15. Refer to the information in /4/.
 In a slave diagnostic message, the slot of the module that caused the diagnostic

message is indicated in bytes 7 and 8 (by setting a bit) as well as in byte 11 (slot
number). Slot 5 is the first slot beside the basic module.
Station status 1 to 3
Master PROFIBUS address
High byte
Low byte
ID-related diagnostics
14 : Length of the device-related diagnostics
H
01 : Code for S7 diagnostic interrupt
H
Slot of the module with diagnostic information
00 : reserved
H
Device-related diagnostic information
Data record 1
see Figure 3-3
00 : not used
H
00 : not used
H
3-7
AS-i Master Module CP 142-2
Vendor
ID