7.8 Initialization
During initialization the positioner adapts it-
self optimally to the friction conditions and
the signal pressure required by 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 element from the
CLOSED position as far as it will go in the
other direction.
Alternatively, a different travel can be se-
lected in Code
P4
. Refer to section 8.
WARNING!
During the initialization, the control valve
moves through its entire travel/angle of ro-
tation range. Therefore, do not start initial-
ization 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:
Press or to select Code
P15
.
Press six seconds long,
6-5-4-3-2-1
- is counted down on the display
Initialization has started, the display
blinks!
Note: The time required for the initialization
procedure depends on the actuator transit
time and can take a few minutes.
Initialization successfully
completed, positioner runs in
closed-loop operation
After a successful initialization, the
positioner runs in closed-loop operation in-
dicated by the closed-loop operation
icon and control position in % predeter-
mined by the reference variable on the dis-
play.
A malfunction leads to the process being in-
terrupted. The fault indication icon ap-
pears on the display. See section 7.12 for
details.
Initialization canceled
38 EB 8394 EN
Start-up – Settings
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