IAI America SCON-CA - Manual (Page 152)

Chapter 3 Operation
142
(Example) Repetition of ST1 � ST2 � ST1 �
Insert timer �t if necessary.
[Example of stop position when the ST* signal is turned OFF by the LS* signal]
If the positioning width is set at a position before the original deceleration start position, the
actuator cannot reach the target position.
Caution: (1) If the ST* signal for the position is turned ON after the completion of
positioning, the LS* signal remains ON.�
(2) Both the LS* and PEND signals are set to ON in the positioning width zone.
Accordingly, they may be turned ON under operation of the actuator if a large
positioning width is set.
(3) Interlock should be taken so that two or more ST* signals are set to ON
simultaneously. If two or more ST* signals are input simultaneously, they will
be executed according to the following priorities: ST0�ST1�ST2
Start signal
ST1
(PLC�Controller)
Turned ON after
entering into
positioning width zone
Target Position
Position sensing output
LS1
(Controller�PLC)
Start signal
ST2
(PLC�Controller)
Position sensing output
LS2
(Controller�PLC)
� t
� t � t
� t : Time required to certainly reach the target position after the position sensing output LS1 or 2 is turned on.
Start signal
ST1
(PLC�Controller)
Turned ON after
entering into
positioning width zone
Target
Position
Position sensing output
LS1
(Controller�PLC)
Operation of actuator
Stop before target position
Orignal deceleration
start position
Positioning
width
Deceleration
start
Velocity
Move
distance