EB 8394 EN
43
Settings
8.4
Entering the direction of action
−
ATO (air to open) applies to a valve opening as the signal pressure increases.
−
ATC (air to close) applies to a valve closing as the signal pressure increases.
The signal pressure is the pneumatic pressure at the output of the positioner applied to the
actuator.
Default direction of action:
ATO
Change the direction of action (enable configuration as described in
section 8.2):
1. Touch
or until Code
P2
appears.
2.
Press
to confirm selected code.
P2
blinks.
3. Touch
or
until the required direction of action appears.
4.
Press
to confirm setting.
Note:
The changed direction of action first becomes effective after the positioner has been
re-initialized.
8.5
Entering the direction of action
The direction of action (
P7
) is set to increasing/increasing (>>) by default, i.e. when the posi
-
tioner is initialized,
0
%
is displayed when the valve is closed and
100
%
when the valve is
fully open. If necessary, the direction of action can be changed (enable configuration as de
-
scribed in section 8.2)
:
Changing the direction of action to increasing/decreasing:
1. Touch
or until Code
P7
appears.
2.
Press
to confirm selected code.
P7
blinks.
3. Touch
or until
<>
appears.
4.
Press
to confirm setting.
Summary of Contents for 3725 series
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