EB 8384-6S EN
129
Malfunctions
9 Malfunctions
Malfunctions are indicated on the display by
error codes. Section 11.4 lists possible error
messages and recommended action.
The error codes appear on the display corre-
sponding to their status classification set over
the condensed state (Maintenance required/
Maintenance demanded:
, Out of specifi
-
cation: blinking, Failure: ). If 'No mes-
sage' is assigned to the error code as the
status classification, the error is not included
in the condensed state.
A status classification is assigned to every
error code in the default setting. The assign-
ment of the status classification can be
changed in TROVIS-VIEW and over the pa
-
rameters of the DD. Refer to the operating in
-
structions for the valve diagnostics
u
EB 8389-1S on EXPERTplus valve diag
-
nostics for more details.
To provide a better overview, the classified
messages are summarized in a condensed
state for the positioner according to the
NAMUR Recommendation NE 107. The sta
-
tus messages are divided into the following
categories:
−
Failure
The positioner cannot perform its control
task due to a malfunction in the position-
er itself or in one of its peripherals or the
positioner has not yet been successfully
initialized.
−
Maintenance required
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 medium term.
−
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.
−
Out of specification
The positioner is running outside the
specified operating conditions.
If an event is classified as “No message”, this
event does not have any affect on the con-
densed state.
Table 17:
Condensed state reading
Condensed state
Positioner display
Failure
Function check
Text e.g.
TUNE
or
TEST
Maintenance required/
maintenance demanded
Out of specification
blinking
The message with the highest priority deter-
mines the condensed state in the positioner.
If fault alarms exist, the possible source of
error is displayed in Code 49 onwards. In
this case,
ERR
is displayed.
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