IAI America PCON-CFA - Manual (Page 58)

3. SCON-CA/CF
A
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3.4.7 I/O Signal Controls and Functions
* ON indicates that the applicable bit is “1,” while OFF indicates that the applicable bit is “0.”
The following specifies the controls and functions of I/O signals used in the position/simple direct mode, half direct
mode and full direct mode. For the I/O signals in the remote I/O mode and remote I/O mode 2, refer to the
operation manual for the controller.
(1) Controller ready (PWR) PLC input signal
This signal turns ON when the controller has become ready to perform control after the power was turned on.
„ Function
This signal turns ON when the controller has been initialized successfully following a power on and become ready
to perform control, regardless of the alarm condition, servo condition, etc.
The PWR signal turns ON as long as the controller is ready to perform control, even when an alarm is present.
(2) Emergency stop (EMGS) PLC input signal
This signal turns ON when the controller has entered an emergency stop mode.
„ Function
This signal turns ON when the control has entered an emergency stop mode (= the motor drive power has
become cut off). It will turn OFF once the emergency stop mode is cancelled.
(3) Alarm (ALM) PLC input signal
This signal turns ON when the controller’s protective circuit (function) has detected an abnormality.
„ Function
This signal turns ON when a protective circuit (function) has actuated following a detection of abnormality.
When the cause of the alarm is removed and the reset (RES) signal is turned ON, the ALM signal will turn OFF if
the applicable alarm is an operation-cancellation alarm. (In the case of a cold-start alarm, the power must be
reconnected.)
Upon detection of an alarm, the status indicator LED (refer to (6) in 3.3) on the front side of the controller
illuminates in red.
(4) Reset (RES) PLC output signal
This signal has two functions: it can be used to reset controller alarms or cancel the remaining travel during a
pause.
„ Function
[1] If the cause of the present alarm is removed and then this signal is turned from OFF to ON, the alarm (ALM)
signal will be reset. (In the case of a cold-start alarm, the power must be reconnected.)
[2] When this signal is turned from OFF to ON while the actuator is paused, the remaining travel will be
cancelled.