68
EB 8389-1S EN
Course of end position
1.
Device settings > Positioner > Transfer
characteristic or Transfer characteristic on/
off
−
Activate CLOSED end position (Code 14):
On
−
CLOSED end position (Code 14):
0.0 to 49.9 %, [1.0 %]
2.
Device settings > Alarm settings
−
Recording threshold:
0.10 to 5.00 %, [0.25 %]
3.
Device settings > Alarm settings > Status
classification > Valve position
Course of end position
−
Monotonically increasing: [ ], , ,
−
Monotonically decreasing: [ ], , ,
−
Alternating: [ ], , ,
10.1
Analysis and monitoring
A reference zero point must be recorded to
analyze the course of the end position. This
is recorded during the valve signature refer-
ence test (see
u
Section 4.1). In case a refer-
ence test has not been performed, the first
zero point that the valve moved to serves as
the reference value. The reference value is
represented by a straight line in the course
of end position graph.
Note:
If the reference value has been reset
by selecting and executing "Reset
'Reference values for course of lower
end position" (see
u
),
the first zero point that the valve
moves to after the reset serves as the
new reference value, provided it does
not exceed the 'Zero limit' (Code 48 -
d5).
If the analysis of course of the end position
pinpoints to a fault, the positioner generates
the 'Course of end position' message with
the selected status classification.
Diagnostics > Monitoring > Valve position
−
Course of end position: , , ,
10.2
Resetting single status mes
-
sages
The 'Course of end position' message and
the measured data for the course of the end
position can be reset by selecting and exe-
cuting "Reset 'Course of lower end position".
If only the reference zero point is to be reset,
select and execute "Reset 'Reference values
for course of lower end position".
Diagnostics > Service/maintenance > Reset
−
Reset 'Course of lower end position'
−
Reset 'Reference values for course of lower end
position'
