Yaskawa Yasnac PC NC User Manual
Page 167
YASNAC PC NC Operating Manual
Chapter 4: Maintenance
4 - 9
(11)Alarm No. 3091 (Broken Spindle PG Cable)
The A, B, and C phase signal cables are checked for breakage.
Table 4.1.5.8
Troubleshooting – Alarm No.: 3091 (Broken Spindle PG Cable)
(12) Alarm Nos.: 3121 to 3125 (Excessive Speed)
This alarm is detected if the motor speed exceeds 1.2 times the maximum motor speed.
Contact your Yaskawa representative.
(13)Alarm Nos.: 3161 to 3165 (Absolute Error)
Malfunction of the absolute encoder is detected. Contact your Yaskawa representative after
checking the following:
•
Whether the alarm occurs immediately after the control power is turned ON.
•
Whether the alarm is cleared when the power is turned OFF and then turned ON again.
•
Whether the battery alarm occurs at the same time.
(14)Alarm Nos.: 3181 to 3185 (Position Error)
Malfunction of the PG pulse (counter in the absolute encoder is detected. Contact your
Yaskawa representative after checking the following:
•
Whether the alarm occurs immediately after the control power is turned ON.
•
Whether the alarm occurs frequently during operation.
(15)Alarm Nos.: 3201 to 3205 (Servo Drive Unit Communication Error)
Communication error between the NC and the AC servo drive unit is detected. Contact your
Yaskawa representative.
(16)Alarm Nos.: 3301 to 3305 (Over current)
Contact your Yaskawa representative after checking the following:
•
Whether the alarm occurs immediately after the control power is turned ON.
•
Whether the alarm occurs after turning ON the main power.
CAUSE CHECK
ITEM
COUNTERMEASURES
Signal cables between the
NC and the AC servo drive
unit are broken or loose.
Make sure that the cable connectors are
plugged into the connectors securely.
If they are loose or disconnected,
re-connect them correctly.
Faulty PG cable breakage -
detection circuit
Check if the alarm occurs in the first
pressing of POWER ON button even
if the cables are connected correctly.
Contact your Yaskawa
representative.
Faulty PG
If an alarm occurs during low speed
operation, the PG could be faulty.
Contact your Yaskawa
representative.