4.2 TROUBLESHOOTING BY ALARM CODES (Cent’d)
4.2.13 ALARMS 3061 TO 3068 (MOTOR OVERLOAD)
Table 4.15
Cause of Trouble
I
Check Method
Cutting condition is too
severe.
Did it occur during drilling and/or
threadcutting ?
Machine runs heavily
due to shortage of
lubricant on the guide
fac~
of machine.
AC servo drive unit or
FC300B failure
Check the oil film on the guide face.
Motor overload alarm activates even if
wiring is correct.
It may cause an alarm.
Solution
Wait until temperature
of servo motor cools down.
Then, restart operation
by alleviating the condition.
Check oil tank and oil
pipe according to instruc-
tion manual of machine.
Replace AC Servo drive
unit or FC300B board.
Contact your YASKAWA
representative.
4.2.14 ALARMS 3081 TO 3088 (PG DISCONNECTION ERROR)
Signal wire disconnection check of A and B phases from
PG.
Table 4.16
Cause of Trouble
Check Method
Solution
Disconnection or contact
“
Check for looseness and removal of
● Correct looseness
failure of signal wire
FC300B board’s connectors CN30,
CN31,
and/or removal of
between NC unit and AC
CN32.
connectors.
servo drive unit
● Check looseness and removal of AC ● Correct wiring as
servo drive unit connectors.
necessary.
● Perform wiring check according to
Connecting Manual
(TOE-C843-11.5).
Failure of PG detector
This type of alarm results when main
Replace FC300B.
circuit connection
power is applied though result of check
Contact your YASKAWA
for above items are normal.
representative.
Motor model parameter
Check if “O” is set to motor model
Set the motor model
setting error.
parameter
(pm1061
to pm1068).
parameter
(pm1061 to
pm1068
) correctly.
.,-.
96
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