YASKAWA MP2000 Series User Manual page 186

[ l ] HOME LS & Phase-C Pulse Method (OW3C = 14)

Operation after Zero Point Return Starts
Travel is started at the approach speed in the direction specified by the sign of the approach speed.
When the rising edge of HOME signal is detected, the speed is reduced to the creep speed. And, the travel direction
depends on the sign of the creep speed.
When the first phase-C pulse is detected after the falling edge of HOME signal, the positioning is performed at posi-
tioning speed.
When the positioning has been completed, a machine coordinate system is established with the final position as the
zero point.
 The moving amount after the phase-C pulse is detected is set in the Zero Point Return Travel Distance. The posi-
tioning speed is set in the Speed Reference Setting.
 If an OT signal is detected during approach speed operation, an alarm will not occur, the direction will be reversed,
and a search will be made for the HOME signal.
 If an OT signal is detected during creep-speed and positioning speed operation, an OT alarm will occur.
Start
N-OT (DI_4)
<Detecting the OT Signal during Approach Speed Movement>
HOME signal (DI_2)
N-OT (DI-4)
 The stopping method when the OT signal is detected depends on the setting of SERVOPACK parameters.
Approach Speed
(OL 3E)
Creep Rate
(OL
HOME signal (DI_2)
Phase-C pulse
Creep Rate
(OL 40)
Phase-C pulse
Speed Reference Setting
(OL 10)
Zero Point Return
Travel Distance
40)
(OL 42)
Zero Point
Approach Speed
(OL
Speed Reference Setting
(OL 10)
Zero Point
Return Travel
Distance
(OL 42)
Start Zero Point
Approach Speed
(OL 3E)
7.2 Motion Command Details
7.2.3 Zero Point Return (ZRET)
P-OT (DI_3)
3E)
P-OT (DI_3)
7
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