Yaskawa Motion Control G7 Drive Software - Manual (Page 25)

Date: 05/16/08, Rev: 08-05 Page 25 of 38 TM.G7SW.117
HOME NEGATIVE WITH BACKUP: When the “Home Command” input is closed, the drive will accelerate using the
C1-07 ramp in the negative (reverse) at the homing speed. When the home switch is activated, the drive will then
proceed positive (forward) at the homing backup speed until the home switch is deactivated. The drive will then
switch back into reverse and proceed at the homing final speed. As soon as the home switch is reactivated, the
drive records the position as home and decelerates to zero speed. The drive then performs a move to “home +
home offset” using d1-16 as the speed, and C1-01 and C1-02 as the accel and decel ramps. When complete the
homing needed output is deactivated and the homing complete output is activated.
Figure 12: Home Negative with Backup Timing Chart (P2-01 = 1)
HOME POSITIVE: Same sequence as “Home Negative,” but the drive proceeds in the positive (forward) direction
at the homing speed.
Figure 13: Home Positive Timing Chart (P2-01 = 2)
Digital
Inputs
Motor
Speed
Digital
Outputs
Run Cmd
Home Cmd
During Move
Move Complete
C1-07
In Position
Window
(P1-08)
0 Hz
Home Switch
Homing Needed
At Home
Homing Complete
C1-08
(-)P2-02
d1-08
C1-01
C1-02
(+)P2-03
(-)P2-04
Digital
Inputs
Motor
Speed
Digital
Outputs
Run Cmd
Home Cmd
C1-07
Move To
Home
In Position
Window
(P1-08)
0 Hz
Home Switch
C1-08 (+)P2-02
C1-01 C1-02
(-)d1-08
During Move
Move Complete
Homing Needed
At Home
Homing
Complete