IAI America SCON-C - Manual (Page 156)

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 Pause during movement
Since move commands are based on level mode, the actuator continues to move while a move command is ON.
Once the move command turns OFF, the actuator will decelerate to a stop and complete the operation.
Therefore, turn OFF the move command if the actuator must be stopped temporarily as a low-degree safety
measure.
(Example) Temporarily stop the actuator while it is moving to the front end.
 Emergency return operation
The following explains what to do when an emergency situation occurred while the actuator was moving and you
want to return the actuator to the standby position (rear end).
(Example) Return the actuator to the standby position (rear end) following an emergency situation occurring
while the actuator was moving to the front end.
Operation timings
PLC processing 1: Turn ON the rear end move command signal (ST0) upon occurrence of the emergency
situation, and then turn OFF the front end move command signal (ST1).
Operation: [1] The actuator starts decelerating upon turning OFF of the front end move command signal
(ST1), and stops.
[2] The actuator reverses its direction and starts moving toward the rear end.
[3] When the rear end is reached, the rear end position complete output (PE0) turns ON.
PLC processing 2: Turn OFF the rear end move command signal (ST0).
Front end move command input
(ST1)
Front end detected output
(LS1)
Speed
Moving Stopped Moving
Front end
Time
Occurrence of
emergency situation
Front end move command input
(ST1)
Rear end move command input
(ST0)
Rear end detected output
(LS0)
Speed
Moving in + direction Moving in –
direction
Rear end
Time