Yaskawa Yasnac PC NC User Manual
Page 224
YASNAC PC NC Operating Manual
Appendix 2: Alarm Tables
A2 - 20
Alarm No.: 3061 to 3068 (Overload)
Alarm No.: 3081 to 3088 (Broken PG Cable)
Alarm No.: 3091 (Broken Spindle PG Cable)
Alarm No.: 3121 to 3125 (Excessive Speed)
The alarm is detected if the motor speed exceeds 1.2 times the maximum motor speed. Contact your Yaskawa representative.
Alarm No.: 3161 to 3165 (Absolute Error)
Malfunction of the absolute encoder is detected. Contact your Yaskawa representative after checking the following:
1.
Whether the alarm occurs immediately after the control power is turned ON.
2
Whether the alarm is cleared when the power is turned OFF and then turned ON again.
3.
Whether the battery alarm occurs at the same time.
ALARM CAUSE
CHECK ITEM
COUNTER MEASURE
Cutting Conditions
Check if the alarm occurred during
machining.
Turn OFF the power and allow the
servo motors to cool. After cooling
change the machining conditions and
restart operation.
Guideways are not lubricated properly
causing heavy axis movements.
If guideways are lubricated check for
damage or obstructions.
Contact the machine tool builder or
your Yaskawa representative.
ALARM CAUSE
CHECK ITEM
COUNTER MEASURE
Signal cables between the NC and the
AC servo drive unit are broken or loose.
Check cable and connectors.
If cable is damaged replace. Check to
make sure connectors are plugged in
securely.
Faulty PG cable breakage detection cir-
cuit.
Check if the alarm occurs when you
first POWER ON even if the cables are
connected properly.
Contact your Yaskawa representative.
Error in motor type parameter setting.
Check the motor type setting parame-
ters (pm1061 to pm1065) if “0” has
been set.
Correct the setting.
ALARM CAUSE
CHECK ITEM
COUNTER MEASURE
Signal cables between the NC and the
AC servo drive unit are damaged or
loose.
Check cable and connectors.
If cable is damaged replace. Check to
make sure connectors are plugged in
securely.
Faulty PG cable breakage detection cir-
cuit.
Check if the alarm occurs when you
first POWER ON even if the cables are
connected properly.
Contact your Yaskawa representative.
Faulty PG
If alarm occurs during low speed opera-
tion the PG could be faulty.
Get a new PG. Contact your Yaskawa
representative.