Siemens SITRANS LR460 HART Operating Instructions Manual page 132

Diagnostics
All diagnostic information shown below is viewable via PDM.
Diagnosis reply (applies only to cyclic masters)
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 diagnostic' and it
is eight bytes long. The last four bytes of the extended diagnostic message give the error
code shown below. (The same information is also available acyclically via the Diagnosis
Object.
Acyclic Diagnostics
This consists of four bytes.
In PROFIBUS PA there are two possible types of Acyclic Diagnostics:
• Extended Mode Diagnosis
• Condensed Mode Diagnosis
You can choose which of these will be returned, by enabling or disabling
Status Mode (COND STAT) on page 88.
Extended Mode Diagnosis will be returned, and the following codes on page 127 will be
used.
Page G-126 SITRANS LR460 (PROFIBUS PA) – INSTRUCTION MANUAL
. The default setting is Condensed Status disabled:
7.1. Condensed
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