IAI America SCON-CA - Manual (Page 114)

Chapter 3 Operation
104
Note 1: The completion position No. output is set to 0 during movement of the actuator.
� �
Caution:
(1) Set the period taken from entering position No. to turning CSTR ON to 6ms or larger. In spite of
6ms timer process in the PLC, commands may be input to the controller concurrently to cause
positioning to another position. Take the scanning time in the PLC into account to set a period as
2 to 4 times as the scanning time. Set the value similarly if the PLC reads the complete position.
(2) At the completion of positioning, positioning complete signal PEND is not turned ON if start
signal SCTR remains ON. If this occurs, turn CSTR OFF then PEND is turned ON immediately.
Therefore, create the sequence program so that turning PEND ON makes CSTR turned OFF
and the PLC waits for the state in which PEND is turned ON.
(3) At the positioning to the position same as that specified in the stop (complete) position number,
PEND is turned OFF once but moving signal MOVE is not turned ON.
Therefore, use PEND to turn CSTR OFF.
(4) MOVE is turned ON as soon as PEND is turned OFF and turned ON as soon as PEND is
turned ON. Accordingly, with a large positioning width being set, MOVE may be turned OFF
while the actuator is moved.
� Binary data � : ON � : OFF
Command position No. PC256 PC128 PC64 PC32 PC16 PC8 PC4 PC2 PC1
Completed position No. PM256 PM128 PM64 PM32 PM16 PM8 PM4 PM2 PM1
0 � � � � � � � � �
1 � � � � � � � � �
2 � � � � � � � � �
3 � � � � � � � � �
4 � � � � � � � � �
5 � � � � � � � � �
6 � � � � � � � � �
7 � � � � � � � � �
8 � � � � � � � � �
9 � � � � � � � � �
10 � � � � � � � � �
••• ••• ••• ••• ••• ••• ••• ••• ••• •••
509 � � � � � � � � �
510 � � � � � � � � �
511 � � � � � � � � �
Command position No.
PC1 to PC**
(PLC�Controller)
Completed position
PM1 to PM**
(Controller�PLC)
Start signal CSTR
(PLC�Controller)
Positioning Completion Signal
PEND
(Controller�PLC)
Moving Signal MOVE
(Controller�PLC)
T1�6ms
PM1 to PM**�0 (Note 1) PM1 to PM**�0 (Note 1)
Turned OFF by
turning PEND OFF
Turned ON after
entering into
positioning width zone
Target Position