Fuji Electric ALPHA5 Smart, User Manual

Page: 89 / 636

CHAPTER 2 WIRING
Description of I/O Signals
2-41
2
Proportional control: Sequence input signal (Reference value 29)
Proportional band control is adopted as a servo amplifier control method.

Function
With S-ON signal turned on, the signal will be turned on while the servomotor shaft is
mechanically locked.
If the proportional control is turned on during servomotor rotation, position control becomes
unstable.
Do not turn on while the servomotor rotates.
If the brake is applied under position control with the servo locked, an overload (oL) alarm is
detected. This is because the servo performs PI control, and generates a torque in an attempt to
restore the original position even if fine deviation is produced. Be sure to turn off P motion before
applying the brake from an external unit.
 Parameter setting
To assign the proportional control to a sequence input terminal, specify the corresponding value
("29") to the input terminal function setting parameter.
Pause: Sequence input signal (Reference value 31)
This signal temporarily stops the start positioning, homing motion and interrupt positioning motion.
 Function
Deceleration starts at the rising edge of the pause signal (31). While the signal is turned on, the
start positioning, homing and interrupt positioning motions are interrupted and stopped. After the
signal is turned off, the remaining motion continues.
The signal is ineffective to pulse ratio 1, pulse ratio 2, and manual forward and reverse rotation.
Deceleration follows the designated acceleration/deceleration time, different from forced stop
(10).
The pause is enabled to the current positioning motion.
 Parameter setting
To assign positioning cancel to a sequence input terminal, enter the corresponding value (“31”) to
the input terminal function setting parameter.
 Relevant description
(1) Positioning cancel
If positioning cancel (“32”) is executed while the pause (“31”) signal remains turned on, the
positioning motion is canceled.