IAI America SCON-C - Manual (Page 86)

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 Home return (HOME)
The controller will start home return operation upon detection of an OFF
 ON edge of this signal.
When the home return is complete, the HEND signal will be output. The HOME signal can be input as many
times as required.
(Note) Even if home return is not performed after the power has been input, the actuator will automatically
perform home return and then move to the target position. Therefore, this signal need not be used at all
time.
The actuator will move to the home position if “0.00 mm” is set in the position data table. However, this
signal is useful when the position data table has no available fields or when the controller is used in the
teaching mode.
 Pause (*STP)
When this signal turns OFF while the actuator is moving, the actuator will decelerate to a stop.
The remaining movement is retained and will be resumed when the signal is turned ON again.
If you wish to cancel the move command itself while this signal is OFF, turn the RES signal ON while this signal
is OFF to cancel the remaining travel distance.
The *STP signal can be used for the following purposes:
[1] Provide a low-level safety measure to stop the axis while the servo is ON, such as a sensor that detects a
person approaching the system
[2] Prevent contact with other equipment
[3] Perform positioning based on sensor or LS detection
(Note) If the *STP signal is turned OFF while the actuator is performing home return, the home return operation
will be put on hold. Once the signal turns ON, the home return operation will be resumed from the point
where the actuator contacts a mechanical end.
 Start (CSTR)
Upon detecting an OFF
 ON edge of this signal, the controller will read the target point number (PC1 to
PC256) and execute positioning operation to the corresponding target position.
Before executing this command, the target position, speed, acceleration and other operation data must be set in
the position table using the PC software or teaching pendant.
If a start command is issued when home return operation has not been performed yet (the HEND output signal is
OFF), the controller will automatically perform home return operation before positioning to the target position.
 Alarm reset (RES)
This signal provides two functions.
[1] Reset the alarm output signal (*ALM) that turned OFF due to an alarm
If an alarm has generated, turn ON this signal after confirming the nature of the alarm.
The controller will reset the alarm upon detection of a rise edge of the RES signal.
(Note) Certain alarms cannot be reset by the RES signal. For details, refer to Appendix 5,
“Troubleshooting.”
[2] Cancel the remaining movement when the pause signal is OFF
This function is used when the remaining movement must be cancelled to allow for incremental moves
(movements at a constant increment) from the position where the actuator stopped following a sensor
detection.