IAI America ACON-CY - Manual (Page 68)

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5. Operation Using I/O Signals
„ Positioning Complete Output for Each Position (PE0, PE1, PE2)
After a move command, the corresponding positioning complete output turns ON when the actuator has
entered the positioning band before the target position.
When the next move command to a different position is issued, the positioning complete output turns OFF.
(Note) If the servo turns off or an emergency stop is actuated while the actuator is standing still at the target
position, the positioning complete output will turn OFF. When the servo subsequently turns on, the
output will turn ON again if the actuator is still inside the positioning band.
Output signal Position detected Remarks
PE0 Rear end
The output position is defined in the “Position” and “Positioning band”
fields under Position No. 0.
PE1 Front end
The output position is defined in the “Position” and “Positioning band”
fields under Position No. 1.
PE2 Intermediate point
The output position is defined in the “Position” and “Positioning band”
fields under Position No. 2.
„ Zone Output (PZONE)
This signal can be used as a limit switch (LS) at the intermediate point, or as a simple yardstick during
push-motion operation.
The zone output signal remains ON while the actuator is inside the range specified by the “Zone +” and “Zone
–” fields of the position table, and turns OFF once the actuator leaves the range.
(Note) This signal is enabled after the coordinate system has been established following the completion of
homing. It will not be output immediately after the power is turned on.
As long as homing has already been completed, this signal remains effective while the servo is off or
an emergency stop is actuated.
„ Homing Complete Output (HEND)
This signal is OFF immediately after the power is turned on.
To establish the initial coordinate, only a rear end move command is accepted after power on. Once a rear
end move command has been input, the actuator performs homing and then moves to the rear end.
This signal will turn ON after the homing is completed.
Once turned ON, this signal will remain ON until the input power is cut off.
Use this signal as an interlock signal before homing.
(Reference) Acceptance of each move command before homing is explained below:
[1] A rear end move command is accepted.
[2] An intermediate point move command is not accepted.
[3] A front end move command is accepted, but once the actuator moves forward at the homing
speed and contacts the mechanical end, the actuator will stop and a front end positioning
complete output (PE1) will turn ON.
In this case, the PE1 signal should be recognized as a tentative signal.
Movement to the front end is permitted to accommodate a situation where there is an obstacle
between the actuator and the rear end.
„ Alarm Output (*ALM)
This signal remains ON while the actuator is normal, and turns OFF if an alarm has occurred.
Cause the PLC to monitor the OFF state of this signal and provide an appropriate safety measure for the
entire system.
Check the nature of each alarm by connecting a PC/teaching pendant, and remove the cause. For details of
alarms, refer to Chapter 7, “Troubleshooting.”