Yaskawa Motion Control G7 Drive Software User 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