IAI America SCON-C - Manual (Page 153)

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3.12 Operations in Solenoid Valve Mode 2 [3-point Type]
After the power has been turned on, input the rear end move command first to complete home return, and then
perform continuous operation.
Example of use in operation) How to move the actuator from the rear end to the front end is explained.
Although the actuator does not stop at the intermediate point, you can increase
the positioning band and use the intermediate point detected output signal (LS2)
as a quasi zone output signal.
Example of position table
No.
Position
[mm]
Speed
[mm/s]
Acceleration
[G]
Deceleration
[G]
Push
[%]
Positioning
band [mm]
Remarks
0 5.00 300.00 0.30 0.30 0 0.10 Rear end
1 380.00 300.00 0.30 0.30 0 0.10 Front end
2 200.00 300.00 0.30 0.30 0 50.00
Intermediate
point
Operation timings
PLC processing 1: Turn OFF the rear end move command signal (ST0) and intermediate point move command
signal (ST2), and turn ON the front end move command signal (ST1).
Operation: [1] The actuator starts moving toward the front end.
[2] When the current position passes 5.1 mm, the rear end detected output (LS0) turns OFF.
[3] When the current position reaches 150 mm, the intermediate point detected output (LS2)
turns ON. Once 250 mm is passed, LS2 turns OFF.
PLC processing 2: If necessary, use the intermediate point detected output (LS2) as a trigger signal with respect
to surrounding equipment.
[4] When the current position reaches 379.9 mm, the front end detected output (LS1) turns
ON.
[5] When the current position reaches 380 mm, the actuator stops.
PLC processing 3: Once the front end detected output (LS1) turns ON, the sequence processing at the front end
is executed. Upon completion of the sequence processing, the front end move command
signal (ST1) turns OFF.
Caution: Provide a ladder sequence circuit where only one move command signal turns ON at a time. If two
or more signals are input at the same time, the signals will be processed in the following priorities:
Priorities: [1] Rear end, [2] Front end, [3] Intermediate point
Take note that incremental position commands are not supported in solenoid valve mode 2 [3-point type].
Front end move command input
(ST1)
Rear end detected output
(LS0)
Intermediate point detected output
(LS2)
Front end detected output
(LS1)
Speed
Rear end:
5 mm
Intermediate point:
200 mm
Front end:
380 mm
Execution of
sequence at
the front end
Time