Commissioning the PROFIBUS-DP
6.9.5
Channel-referred diagnostic data
The quantity of module-specific diagnostic information is dependent on the number of modules which contain
errors. Three bytes are needed for each error. The first byte describes the plug-in station number of the
module. The second byte indicates which channel had the error. The third byte describes the type of error.
Byte n, module-specific diagnostic header
Bit 0
Plug-in station number of the module, including gateway I/O
Bit 1
Plug-in station number of the module, including gateway I/O
Bit 2
Plug-in station number of the module, including gateway I/O
Bit 3
Plug-in station number of the module, including gateway I/O
Bit 4
Plug-in station number of the module, including gateway I/O
Bit 5
Plug-in station number of the module, including gateway I/O
Bit 6
The code for channel-specific diagnostics is always equal to 0.
Bit 7
The code for channel-specific diagnostics is always equal to 1.
Byte n+1, gives details on which channel type and which location in the module
Bit 0
Channel number
Bit 1
Channel number
Bit 2
Channel number
Bit 3
Channel number
Bit 4
Channel number
Bit 5
Channel number
Bit 6
Channel type
Bit 7
Channel type
Byte n+2, gives detail about which error has occurred
Bit 0
Error code
Bit 1
Error code
Bit 2
Error code
Bit 3
Error code
Bit 4
Error code
Bit 5
Data format
Bit 6
Data format
Bit 7
Data format
Table 93
Channel-referred diagnostic data
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