Fuji Electric ALPHA7, User Manual

Page: 79 / 662

CHAPTER 2 WIRING
2-32
Description of I/O Signals
2
Forward command [FWD]: Sequence input signal (Reference value 2)
Reverse command [REV]: Sequence input signal (Reference value 3)
The signal makes the servomotor keep running while it remains turned on.
 Function
The servomotor keeps rotating in the positive (negative-) direction while the forward command
[FWD] (reverse command [REV]) signal remains turned on. Acceleration begins at the rising edge,
while the trailing edge triggers deceleration.
Control mode Conditions for valid FWD/REV
signal
FWD/REV simultaneous signal
ON
Speed control ON level Deceleration stop
Position control ON edge (rising edge) Behavior immediately before
simultaneous ON is retained
Torque control ON level Deceleration stop
(1) Speed control
The motor rotates at a speed selected through combination of multi-step speed settings [X1] (=
No. 51), [X2] (= No. 52) and [X3] (= No. 53) (see the table on the next page).
If both the forward command [FWD] and reverse command [REV] are turned on, the motor is
controlled to stop.
X3 X2 X1 Rotation speed
OFF OFF OFF Speed command (VREF terminal) voltage
OFF OFF ON PA1_41: Manual feed speed 1
OFF ON OFF PA1_42: Manual feed speed 2
ON ON ON PA1_43: Manual feed speed 3
ON OFF OFF PA1_44: Manual feed speed 4
ON OFF ON PA1_45: Manual feed speed 5
ON ON OFF PA1_46: Manual feed speed 6
ON ON ON PA1_47: Manual feed speed 7