User's Manual

7ML19985LT01 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 135
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F: 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
diagnosis (see
Extended Mode Diagnosis on page 137 and Condensed Mode Diagnosis
on page 136).
The same information is also available acyclically via the Diagnosis Object.
Status Codes for Uncertain Quality
Values in hex notation Description
0x4B Value is a substituted value (normally used in Failsafe).
0x4C/0x4F Initial value.
0x47 Last usable value.
Status Codes for Bad Quality
Values in hex notation Description
0x10
The LOE timer has expired: this could be caused by LOE or by a sen-
sor malfunction: value is BAD.
0x01
There is an error in the configuration of the function blocks in PROFI-
BUS PA
a)
.
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.
0X1F
The function block, or the transducer block, has been placed out of
service.
Cyclic Diagnosis (6 bytes) Extended Cyclic Diagnosis (8 bytes)
Diagnosis Object
(last 4 bytes)
Condensed Mode
Diagnosis
Extended Mode
Diagnosis