YASKAWA MP2000 Series User Manual page 194

[ q ] INPUT Signal Method (OW3C = 19)

Operation after Zero Point Return Starts
Travel is started at the creep speed in the direction specified by the sign of the creep speed.
When the rising edge of the INPUT signal is detected, the positioning is performed at the positioning 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 rising edge of the INPUT signal is detected is set in the Zero Point Return Travel Dis-
tance. The positioning speed is set in the Speed Reference Setting.
 If an OT signal is detected during creep speed operation, an OT alarm will not occur, the direction will be reversed,
and a search will be made for the INPUT signal.
 If an OT signal is detected during positioning speed operation, an OT alarm will occur.
 The INPUT signal is allocated to the motion setting parameter OW05 bit B, allowing the zero point return opera-
tion to be performed without actually wiring a signal. This method can thus be used to temporarily set the zero point
during trial operation.
 Detecting the rising edge of the INPUT signal is performed using software processing. The position where position-
ing is completed will depend on the high-speed scan setting, positioning speed, etc. Do not use this method if repeat
accuracy is required in the position where the zero point return operation is completed.
N-OT (DI_4)
<Detecting the OT Signal during Creep Speed Movement>
Creep Rate
(OL
Zero Point Return Input signal
N-OT (DI_4)
 The stopping method when the OT signal is detected depends on the setting of SERVOPACK parameters.
Creep Rate
(OL 40)
Start
Zero Point Return Input signal
(OW 05, bit B)
Creep Rate
(OL 40)
Start Zero Point
Zero Point Return
Travel Distance
(OL 42)
40)
Speed Reference Setting
(OL 10)
(OW 05, bit B)
7.2.3 Zero Point Return (ZRET)
Speed Reference Setting
(OL 10)
Zero Point Return
Travel Distance
(OL 42)
Zero Point
7.2 Motion Command Details
P-OT (DI_3)
P-OT (DI_3)
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