Al-b2:low-speed loop acceleration error, Al-d2:cpu integrated a/d converter is defective – Yaskawa YASNAC PC NC Maintenance Manual User Manual
Page 88
Chapter 4: Troubleshooting
PC NC Maintenance Manual
4-67
AL-b2:Low-speed loop acceleration error
Error Contents
The motor speed continued 8msec or more in the state which exceeded
max. wpm of low speed winding during low-speed winding.
Cause and measures
AL-d1:A/D converter for I/O card speed command is defective.
Error Contents
The A/D converter for the speed command of the I/O card is defective.
Cause and measures
AL-d2:CPU integrated A/D converter is defective.
Error Contents
The CPU integrated A/D converter is defective.
Cause and measures
Cause Measures
An external sequence is defective.
Examine an external sequence whether the winding switch
point is normal.
Cause Measures
I/O card connection defect
Confirm the connection (12CN) between the I/O card and the
control card.
I/O card fault
Exchange unit (exchange I/O card)
Control card fault
Exchange unit (exchange control card)
Cause Measures
Control card fault
Exchange unit (exchange control card)