Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 100)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-79
The orientation completion signal is not output.
Cause and measures
Cause Measures
Orientation signal ORT is not inputted. Check to see that the orientation signal ORT is set to CLOSE
by the drive state display (U1-09).
Selection signal improper setting
Completion signal is not outputted
when tuning at initialization. Check that selection signal (bit 4 of C2-22, C3-22) is set cor-
rectly.
1 : enable tuning.
2: disable tuning
Transmission gear ratio improper set-
ting Check to see that the transmission gear ratio (C1-27-29) is set
with a correct value and refer to the machine data.
Position control proportional gain is
high. Check that there is no vibration with forward/reverse direction
near the stopping position.
Reduce the position control proportional gain to suppress the
vibration level.
Position control proportional gain is
low. Check that it is reaching the stopping position by the drive
state display (U2-03, or U3-03).
Raise the position control proportional gain to reach the com-
mand position.
Orientation card fault Exchange the orientation card with a non-defective one.
Control card fault Exchange unit (exchange control card)