5.2
Classification of the status alarms and the condensed state
Note:
The following description only applies to positioners configured corresponding to the
Profile 3.01 with the 'Condensed status and diagnostic messages' extension (set in the
COND_STATUS_ DIAG parameter of the Physical Block).
The alarms are classified in the positioner, i.e. when an alarm is issued, it is assigned a sta-
tus. The classification of the states can be changed.
To provide a better overview, the positioner state is summarized in a condensed state.
This condensed state is made up from a summary of all classified status alarms.
If an event is classified with “No message”, this event has no influence on the condensed sta-
te. If the classification “No message” is assigned for a diagnostic alarm, this alarm is not in-
cluded in the diagnostic parameter. To be able to read all diagnostic alarms regardless of
which classification they have been assigned to, these are entered in
DIAGNOSIS_EXT_1_RAW and DIAGNOSIS_EXT_2_RAW parameters.
The following states can be selected (refer to Fig. 3):
4
Maintenance alarm
The positioner cannot perform its control task due to a functional fault in the device or in
one of its peripherals or an initialization has not yet been successfully completed.
4
Maintenance required
The positioner still performs its control task (with restrictions). A maintenance requirement
or above average wear has been determined. The wear tolerance will soon be exhausted
or is reducing at a faster rate than expected. Maintenance is necessary in the medium
term.
4
Maintenance demanded
The positioner still performs its control task (with restrictions). A maintenance demand or
above average wear has been determined. The wear tolerance will soon be exhausted or
is reducing at a faster rate than expected. Maintenance is necessary in the short term.
4
Process-related fault/Out of specification
The current process conditions do not allow a valid calculation of values.
4
Function check
Test or calibration procedures are being performed. The positioner is temporarily unable
to perform its control task until this procedure is completed.
18
KH 8384-4 EN
Measured value status and valve diagnostics
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