IAI America PDR-101-MW - Manual (Page 38)

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5. Control and Function of I/O Signals
5.1 Input Signals
Input signals to the controller are filtered using a time constant set in order to prevent malfunction due to
chattering, noise, etc. (This does not apply to an external forced stop signal (CSTP) input and command
pulse-train input (PP, /PP, NP and /NP).)
Therefore, input each input signal continuously for 6 ms or more.
5.1.1 Servo ON Signal (SON)
This signal places the servo motor of the actuator in operable status.
„
Function
The actuator is operable while the SON signal is turned on.
The actuator cannot be operated while this signal is off, even if the power is supplied to the controller.
If this signal is turned off while the actuator is operating, the actuator decelerates to a stop at the forced
stopping torque. After it stops, the servo is turned off and the motor is placed in the free-run status.
At this point, the function (dynamic brake, electromagnetic brake or deviation counter clear) selected
with the flag for setting function at stop (an actuator parameter) is activated.
SON
5 ms
20 ms 50 ms
Input signal
Input signal
Recognized
Not
recognized
Dynamic brake
Servo ON
Electromagnetic
brake
6 ms