Manual VIPA System 200V Chapter 3 Deployment IM 253DP
HB97E - IM - RE_253-xDPxx - Rev. 12/44 3-15
The length of the diagnostic messages that are generated by the
PROFIBUS slave is 23Byte. This is also referred to as the device related
diagnostic data.
When the PROFIBUS slave sends a diagnostic message to the master, a
6Byte standard diagnostic block and 1Byte header is prepended to the
23Byte diagnostic data:
Byte 0 ... Byte 5 Standard diagnostic data precedes message to master
Byte 6 Header device related diagnostic only for PROFIBUS transfers
Byte 7 ... 29 Device related diagnostic data Diagnostic data that is saved internally
Byte x...
Byte x+8
Redundancy state of a
redundant DP slave
is only added at transfer via PROFIBUS
and usage of the redundant DP slave
Diagnostic data that is being transferred to the master consist of the
standard diagnostic data for slaves and a header byte that are prepended
to the device related diagnostic bytes. The PROFIBUS standards contain
more detailed information on the structure of standard diagnostic data.
These standards are available from the PROFIBUS User Organization. The
structure of the standard diagnostic data for slaves is as follows:
Byte Bit 7 ... Bit 0
0 Bit 0: permanently 0
Bit 1: slave not ready for data exchange
Bit 2: configuration data mismatch
Bit 3: slave has external diagnostic data
Bit 4: slave does not support the requested function
Bit 5: permanently 0
Bit 6: bad configuration
Bit 7: permanently 0
1 Bit 0: slave requires re-configuration
Bit 1: statistical diagnostic
Bit 2: permanently 1
Bit 3: Watchdog active
Bit 4: Freeze-command was received
Bit 5: Sync-command was received
Bit 6: reserved
Bit 7: permanently 0
2 Bit 0 ... Bit 6: reserved
Bit 7: diagnostic data overflow
3 Master address after configuration
FFh: slave was not configured
4 Ident number high byte
5 Ident number low byte
Structure of the
DP-V0 diagnostic
data via
PROFIBUS
Standard
diagnostic data
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