User's Manual
Table Of Contents
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Threaded horn antenna
- 12.2 Threaded horn antenna with extension
- 12.3 Flanged horn antenna
- 12.4 Flanged horn antenna with extension
- 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.7 Threaded PVDF antenna
- 12.8 Threaded connection markings
- 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna
- 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.11 Flat-Face flange
- 12.12 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- B Appendix B: PROFIBUS PA profile structure
- C Appendix C: Communications via PROFIBUS
- D Appendix D: Certificates and Support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
Appendix C: Communications via PROFIBUS
C.10 Diagnostics
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB
237
C.10
Diagnostics
All diagnostic information shown below is viewable via PDM.
C.10.1
Diagnosis reply (available cyclically)
During DPV0 data exchange, the PROFIBUS PA slave will notify the Master when a serious
error occurs. The Master will then send a Diagnosis request. The reply to this request is normally
logged in the PLC and is referred to as the "Hex values."
The reply may contain two parts. The first part is 6 bytes long and is defined by the PROFIBUS
standard. If there is a second part, it is called the ’extended cyclic diagnosis’ and it is 8 bytes
long. The last 4 bytes of the extended diagnostic message give the error diagnosis [see
Extended Mode Diagnosis (Page 238) and Condensed Mode Diagnosis (Page 239)].
The same information is also available acyclically via the Diagnosis Object.
C.10.2
Diagnosis object (available cyclically or acyclically)
This consists of four bytes.
In PROFIBUS PA there are two options for the Diagnosis Object:
● Extended Mode Diagnosis (Page 238)
● Condensed Mode Diagnosis (Page 239)
You can choose which of these will be returned, by enabling or disabling Condensed Status.
See
Enable (3.4.1.)
. When Condensed Status is disabled
Extended Mode Diagnosis
will be
returned, and the following codes will be used.