ator and take several minutes.
Positioners with EXPERT
+
diagnostic func
-
tions start plotting the reference graphs after
the initialization process has been com
-
pleted. See note at the end of this section.
WARNING!
During the initialization, the control
valve moves through its entire tra
-
vel/angle of rotation range. Therefo
-
re, do not start initialization while a
process is running, but only during
start-up, when all shut-off valves are
closed.
Note: The initialization procedure
can be interrupted while running by
pressing . StOP appears three se-
conds long and the positioner then
moves to the fail-safe position.
The fail-safe position can be cance-
led again over Code 0.
Alternating displays
Initialization running
Symbol depending on in
-
itialization mode selected
Bar graph display
indicating the progress of
the initialization
Initialization successful,
positioner in automatic
operating mode
After a successful initialization, the
positioner runs in closed-loop operation in
-
dicated by the closed-loop operation
icon.
The control position in % predetermined by
the reference variable appears on the dis
-
play.
A malfunctioning leads to the process being
interrupted. The initialization error appears
on the display according to how it has been
classified by the condensed status. See sec
-
tion 5.7 on page 70.
If the slide switch is set to AIR TO CLOSE,
the positioner automatically switches to the
direction of action increasing/decreasing
(äæ) on successful completion of initializa-
tion. This results in the following assignment
between reference variable and valve posi-
tion:
Valve closed
position
Direction of
action
Reference variable
Valve
Closed at Open at
AIR TO OPEN
ää 0 % 100 %
AIR TO CLOSE
äæ 100 % 0 %
The tight-closing function is activated.
Set Code 15 (final position w>) to 99 % for
three-way valves.
Further settings relevant for the valve can be
entered subsequently.
Note on EXPERT
+
: Positioner with integrated
EXPERT
+
diagnostics automatically start to
plot the reference graphs (drive signal y d1
and hysteresis d2) after initialization has
been completed. TEST d1 and d2 appear on
the display in an alternating sequence.
EB 8384-4 EN 63
Start-up and settings
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