IAI America ERC3 - Manual (Page 280)

Chapter 4 Operation
4.4 Operation in MEC Mode 1 and 2 (Operation with PLC)
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(3) Pressing (ST0, ST1, PE0, PE1, PE2)
Pressing movement to the end point is performed when Movement Signal 2 ST1 is ON. The
end point positioning complete signal PE1 turns ON after the pressing is completed. Pressing
towards the start point and intermediate point can be conducted by controlling Movement
Signals 1 and 2 as the same as the ordinary positioning for the 3-point stop position (PE0
turns ON when pressing is complete at the start point and PE2 turns on when pressing is
complete at the intermediate point).
Also, it is able to perform a pressing operation to the intermediate position towards the start
point side. When going towards the start point side, the operation is a pulling operation, and
when moving to the intermediate point, it is pulling operation if it is from the end point, and is
pressing if from the start point.
Even if the pressing is missed, each positioning complete signal PE0, PE1 and PE2 will turn
ON.
The diagram below is the time chart of the pressing operation in the movement towards the
end point.
Caution: Even when the pressing is missed, each positioning complete signal will turn
ON. If a detection of miss-pressing is required, set a large pressing band and
judge with the timer.
Move signal 1 ST0
Actuator operation
Move signal 2 ST1
End Point Positioning Completion
PE1
Start Point Positioning Completion
PE0
Push width Push width
Pressing complete End point
If operation missed