Proportional Control: Sequence Input Signal (Reference Value 29); Pause: Sequence Input Signal (Reference Value 31) - Fuji Electric ALPHA7 User Manual

CHAPTER 2 WIRING

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
2
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 the proportional
control before applying the brake from an external unit.
 Parameter setting
To assign the proportional control to IQ area (sequence input terminal), specify the corresponding
value ("29") to the input terminal function setting parameter.
This signal is handled to be always turned off if it is not assigned to the sequence input terminal.

Pause: Sequence input signal (Reference value 31)

This signal temporarily stops the start positioning, homing motion and interrupt positioning motion.
This signal is enabled only for LS type.
 Function
Deceleration starts at the activating 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
If assigning pause to the IQ area (sequence input terminal), set the value (31) corresponding to
the input terminal function setting parameter.
This signal is handled to be always turned off if it is not assigned to the sequence input terminal.
2-62
Description of I/O Signals