Fuji Electric ALPHA7, User Manual

Page: 261 / 662

CHAPTER 4 PARAMETER
4-70
Automatic Operation Setting Parameters
4

Zero speed and in-position [INP] are temporarily turned on when the speed is reduced to zero at
changeover of the direction of rotation. Signal transition may not be detected according to some
scanning frequencies of the host controller.

[Supplement] Operation example showing the machine position in lateral direction
[Homing starting after LS activation]
(1) A travel in the reverse direction starts at the homing speed (PA2_06).
(2) When the falling edge (ON-to-OFF transition) of the zero LS is detected, reverse rotation
continues to decelerate to the creep speed for homing (PA2_07).
(3) When the first encoder Z-phase (PA2_11) is detected after the rising edge (OFF-to-ON
transition) of the home position LS is detected, a travel is made by the home position shift
unit amount (PA2_14), followed by stoppage.
[Homing starting after LS deactivation]
(1) A travel in the forward direction starts at the homing speed (PA2_06).
(2) Because the deceleration operation for creep speed (PA2_15) is set at “1” (reverse rotation
enable), reverse rotation is made upon detection of the rising edge (OFF-to-ON transition) of
the home position LS while decelerating to the creep speed for homing (PA2_07).
(3) Changeover to forward rotation is made again upon detection of the falling edge
(ON-to-OFF transition) of the home position LS.
(4) When the first encoder Z-phase (PA2_11) is detected after the rising edge (OFF-to-ON
transition) of the home position LS is detected, a travel is made by the home position shift
unit amount (PA2_14), followed by stoppage.
Machine moving range
LS (ON active)
Start from inside of LS
Z-phase
PA2_14 ： Home
position shift unit
amount
PA2_06 ： Homing speed
PA2_06 ： Homing speed
PA2_07
：
Creep
speed for homing
PA2_07 ： Creep
speed for homing
Start from outside of LS
ON edge of LS Forward rotation
Reverse rotation
→
Position
→ Position