LTQ008 – LTQ230 Series 3-Phase
Products
User Instructions –
AIIOM000165
EN
Page
18
of
40
5.7
LTQ LL Series LCS Operation
Figure 14: Panel shown in the STOP mode
Operating the Local Control Station
1.
The mode switch (right hand side) has three positions:
i.
STOP (center position)
On/Off actuators: This position removes any ability to
reposition the actuator electrically. Power is still present in
the unit, and the open and close LED indicators are
operational. When fully CW (0°), the red LED will be steady
on. Due to its epicyclic gear train, the manual handwheel
can be used to position the actuator. The actuator will
remain in the position last determined by the use of the
handwheel.
Proportional control actuators: In this position, the actuator
generates a 4 – 20 mA (2 – 10 VDC) feedback signal out,
respective of the position of the actuator.
ii.
REM (REMOTE)
On/Off actuators: This position sets the actuator to respond
to field generated control signals. In this mode, the position
knob (left side) does not affect the positioning of the
actuator. The external signal device controls all actuator
movement. The manual handwheel may be used to
reposition the actuator while in this mode; however, if an
active, external signal is present, the actuator will reposition
as a result of that control signal. The LED indicators are
active in this mode.
Proportional control actuators: The actuator follows the
incoming 4 – 20 mA (2 – 10 VDC) control signal, generating a
4 – 20 mA (2 – 10 VDC) feedback signal out, respective of
the position of the actuator.
iii.
LOC (LOCAL)
On/Off actuators: This position sets the actuator to respond
to the position knob. In this position, the LED indicators are
active, and all external field signals are ignored, having no
effect on the positioning of the actuator.
Proportional control actuators: The actuator responds to the
function of the position knob, generating a 4 – 20 mA (2 – 10
VDC) feedback signal out, respective of the position of the
actuator.
2.
The position switch (left hand size) has three positions that the
actuator responds to when in the LOC mode:
i.
OPE
(CCW, all models): The actuator will drive to the fully
CCW position.
ii.
CLO
(CW, all models): The actuator will drive to the fully CW
position
- There is an unmarked hold position detente in
the knob (red dot in
Error! Reference source not found.
) that
allows the actuator to maintain position at some point away
from the full travel end-stops. In this mode, the manual
handwheel may be used to reposition the actuator, and it will
remain in this position while the position knob is in the hold
position. The LED indicators are active in this mode, and all
external field signals are ignored, having no effect on the
positioning of the actuator.
Figure 15: Panel shown in the REM mode
Figure 16: Panel shown in the LOC mode,
driving CW
Figure 17: Panel shown in the LOC mode,
driving CCW
- There is a padlockable
lever that engages with the mode knob to
lock the operation of the mode switch in
position. It provides restricted access in any of
the three positions.
