User's Manual

Table Of Contents
A5E32337685 SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 125
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G: Communications PA
Diagnostics
All diagnostic information shown below is viewable via PDM.
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
code shown. (See
Extended Mode Diagnosis
on page 126 and
Condensed Mode
Diagnosis
on page 126.)
The same infomration is also available acyclically via the Diagnosis Object.
Diagnosis Object (available cyclically or acyclically)
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 Condensed
Status Mode (COND. STAT. MODE) (3.6.1.) on page 80. The default setting is Condensed
Status enabled: Extended Mode Diagnosis will be returned, and the following codes will
be used.
Status Codes for Bad Quality
Values in hex notation Description
0x10...0x1C
The LOE timer has expired: this could be caused by LOE or by
a sensor malfunction: value is BAD.
0x04...0x07
There is an error in the configuration of the function blocks in
PROFIBUS PA
a)
.
0x1C...0x1F
The function block, or the transducer block, has been placed
out of service.
a)
This could happen when a firmware download has been done, but a system reset has not
been done. This could also happen if the function blocks are not configured properly
using the handheld programmer, PDM or acyclic services.
Cyclic Diagnosis (6 bytes)
Extended Cyclic Diagnosis (8 bytes)
Diagnosis Object
(last 4 bytes)
Condensed
Mode Diagnosis
Extended Mode
Diagnosis