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11.6.1
Diagnostic functions
PROFIBUS DP provides an extensive set of diagnostic functions for quick error localiza-
tion. Diagnostic messages are transferred via the bus and collected by the master. In the
operating mode DP slave the CPU sends diagnostic data when requested by the master
or in case of an error. Since a part of the diagnostic data (Byte 11 ... 15) is located in the
peripheral address area of the CPU, you may start the diagnostics and modify the diag-
nostic data. Diagnostic data consist of:
n
Standard diagnostic data (Byte 0 ... 5),
n
Device specific diagnostic data (Byte 6 ... 15).
The diagnostic data have the following structure:
Standard diagnostic data
Byte 0
Station status 1
Byte 1
Station status 2
Byte 2
Station status 3
Byte 3
Master address
Byte 4
Ident number (low)
Byte 5
Ident number High
Device specific diagnostic data
Byte 6
Length and code device specific diagnostic
Byte 7
Device specific diagnostic messages
Byte 8...
Byte 10
reserved
Byte 11 ... Byte 15
User-specific diagnostic data is mapped into the
peripheral addressing range of the CPU and may be
modified and sent to the master.
Overview
Structure
VIPA System SLIO
Option: Deployment PROFIBUS communication
Deployment as PROFIBUS DP slave > Diagnostic functions
HB300 | CPU | 013-CCF0R00 | en | 19-30
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