
7.6.5 Closing fully/opening fully (end position tolerance for setpoint E1)
If the end positions cannot be reached due to inaccurate analogue setpoint
signals (0/4 mA or 20 mA), a tolerance for the nominal value within the end
position range can be set. If the tolerance is exceeded or not reached, the
actuator continues the operation until the full end position has been rea-
ched. This ensures that the actuator opens and closes fully.
Information
The tolerance ranges are not effective if the operation commands are trans-
ferred to the actuator as fieldbus telegrams. In this case the actuator runs
completely CLOSED as soon as it receives the nominal value 0 % and com-
pletely OPEN as soon as it receives the nominal value 100.0 %.
Æ
Via the menu to parameter:
MAIN MENU (M0)
SETTINGS (M1)
POSITIONER (M19)
FULL OPEN ADJUST (M1911)
FULL CLOSE ADJUST (M1912)
Default values:
FULL OPEN ADJUST
=
100 %
FULL CLOSE ADJUST
=
0 %
Setting ranges:
FULL OPEN ADJUST
=
95 %
to
100 %
of travel
FULL CLOSE ADJUST
=
0 %
to
50 %
of travel
7.6.6 Open-close duty (REMOTE) or modulating duty (SETPOINT) selection
Selection between open-close duty and modulating duty is defined by the
appropriate function blocks:
Open-close duty: Use Discrete Output Function Block (DOFB).
Modulating duty: Use Analog Output Function Block (AOFB).
Information
These two function blocks may not be used simultaneously.
The following versions also allow a change-over between open-close and
modulating duty via the MODE input (refer to wiring diagram):
.
in addition to the Foundation Fieldbus interface, the AUMATIC is equip-
ped with a further parallel interface (refer to page 66)
.
the AUMATIC is equipped with additional control inputs (refer to page
63).
MODE input: + 24 V DC = REMOTE MODE = open-close duty, i.e. the con-
trol is executed via commands OPEN - STOP - CLOSE
MODE input: 0 V (or input open) = SETPOINT = modulating duty, i.e. the
control is executed via an analogue signal (e.g. 0/4 – 20 mA)
53
Actuator controls
Manual
AUMATIC AC 01.1/ACExC 01.1 Foundation Fieldbus
EDIT
M1912
FULL CLOSE ADJUST
0 %
:EDIT
↵
:OK
C:ESC
EDIT
M1911
FULL OPEN ADJUST
100 %
:EDIT
↵
:OK
C:ESC