IAI America PCON-CF - Manual (Page 77)

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5. I/O Signal Control and Signal Functions
„ Brake release (BKRL)
When the actuator is equipped with a brake, you may want to forcibly release the brake in certain situations such
as when starting up the system for the first time. Normally the brake release switch on the front panel of the
controller is set to the “RLS” side to release the brake. For added convenience, the brake can now be released
from the PLC.
If this signal is ON while the servo is off, the brake is released.
Use this signal to provide a release switch near the actuator when the actuator is located away from the
controller.
„ Operation mode (MODE)
This signal is effective when the teaching type is selected.
When this signal is turned ON while the actuator is standing still, the normal operation mode will change to the
teaching mode.
The controller will turn ON the MODES output signal upon receiving this signal.
Program the PLC so that it will accept a current-position write command after confirming that the MODES output
signal is ON.
When this signal is turned OFF, the controller will return to the normal operation mode.
„ Current-position write (PWRT)
This signal is enabled when the aforementioned MODES output signal is ON.
When this signal has remained ON for 20 msec or longer, the controller will read the position number specified
by a binary code consisting of PC1 through PC32 as currently detected, and write the current position data in the
“Position” field of the corresponding position number.
If data of other items (speed, acceleration/deceleration, positioning band, etc.) are yet to be defined, the default
settings of the corresponding parameters will be written.
When the writing completes successfully, the WEND output signal will turn ON.
Configure the system in such a way that the PLC will turn OFF the PWRT signal when WEND turns ON. The
controller will turn OFF WEND once the PWRT signal turns OFF.
(Note) An alarm will generate if a write command is issued when home return has not been performed yet or
while the actuator is moving.
„ Manual operation switching (JISL)
This signal is enabled when the teaching type is selected.
The JISL signal is used to switch operations in the manual mode. Specifically, the actuator will jog when this
signal is OFF, or inch when this signal is ON.
If this signal is turned ON while the actuator is jogging, the actuator will decelerate to a stop.
If this signal is turned OFF while the actuator is inching, the actuator will continue with its inching movement.