16.8 Analogue position feedback
If the actuator is equipped with a position transmitter (potentiometer or
RWG), an analogue position feedback (galvanically isolated) is available in
form of a 4 - 20 mA signal (see parameter "
I/O1 ANALOG OUT1 TYPE
"
page 46) at the electrical connection (see wiring diagram). An adjustment to
the end positions or the defined travel is not required. An automatic
adjustment is done via the limit switches (LSC (WSR) and LSO (WOEL)).
For actuators with Profibus DP interface the position feedback is done via
the process representation.
16.9 Type of seating
Limit seating:
The limit switching (page 13, clause 8., 10.) is set in such a way that the
actuator switches off at the desired switching points.
Setting:
The type of seating can be set separately for direction CLOSE and direction
OPEN.
Parameter "
OPEN POSITION
", (page 27, menu
M11
)
Parameter "
CLOSED POSITION
", (page 27, menu
M11
)
The parameters "
OPEN POSITION
" and "
CLOSED
POSITION
" may only be set to "LIMIT".
16.10 Push-to-run operation or self-retaining
Push-to-run operation:
Actuator only runs in direction OPEN or CLOSE while a run command is
issued. When the run command is removed, the actuator stops.
Self-retaining:
Actuator runs in direction OPEN or CLOSE after a run command has been
given. If the run command is removed, the actuator continues to run
(self-retaining) until it is stopped by the command STOP or an end position
or intermediate position has been reached.
Self-retaining without STOP:
A direct reversing of the direction of rotation without STOP-command is
possible.
Setting:
Push-to-run operation and self-retaining can be set separately for the
operation mode LOCAL and the operation mode REMOTE and SETPOINT.
Parameter "
MAINTAINED LOCAL
", (page 27, menu
M13
)
Parameter "
MAINTAINED REMOTE
", (page 29, menu
M14
)
55
Part-turn actuators SG 03.3 – SG 04.3
Operation instructions
with AUMATIC AC 01.1