5.5 Initialization
During initialization the positioner adapts it-
self optimally to the friction conditions and
the signal pressure demand of the control
valve.
The type and extent of self-adaptation de-
pends on the preset parameters.
MAX
is the default setting for the nominal
range (Code
P4
). During the initialization
process, the positioner determines the
travel/rotational angle of the closing ele
-
ment from the CLOSED position as far as it
will go in the other direction.
Note!
For standard operation, after the positioner
is mounted on the valve and the volume re
-
striction has been set and the fail-safe posi
-
tion has been checked over Code P2, start
initialization over Code P15 to ensure the
optimal functioning of the positioner.
The positioner works with its standard set
-
tings (default settings)
.
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.
Start initialization by activating Code
P15
as follows:
Turn until Code
P15
appears
Press button 6 seconds long,
6-5-4-3-2-1
- is counted down on the display.
Initialization has started, the display
blinks!
EB 8384-1 EN 31
Start-up
Parameter codes * The positioner must be re-initialized when the setting is changed [...] Default setting
P0
Display with status indication
P9
Pressure limit 2.4 bar [OFF]
P1
Reading direction
P10
End position w < [ON]
P2 *
Fail-safe position [ATO] / ATC
P11
End position w > [OFF]
P3 *
Pin position [35]
P12
Limit value A1 switching threshold [2 %]
P4 *
Nominal range [MAX]
P13
Limit value A2 switching threshold [98 %]
P5
Characteristic [1]
P14
Display of reference variable w
P6
Reference variable [4...20 mA]
P15
INIT Start initialization
P7
w/x direction of action [>>]
P16
ZERO Start zero calibration
P8 *
Gain K
P
[50]
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