
FANUC SERVO AMPLIFIER βi series I/O Link Option
Modification from I/O Link β
EDIT
DRAW. NO. CUST
TITLE
DESCRIPTION
DESIG.
DATE
A-79487E
11
23
01
04.03.15
SHEET
Newly designed
Pulse coder alarms
No. LED display
Description
Countermeasure
300
A communication error (DTER)
for the serial pulse coder was
detected.
Check the continuity of the signal
cable. If the cable is normal, the
pulse coder may be defective.
Turn the power off. If the alarm
recurs when the power is
reapplied, replace the serial pulse
coder, together with the motor.
301
A communication error (CRCER)
for the serial pulse coder was
detected.
Check the continuity of the signal
cable. If the cable is normal, the
pulse coder or servo amplifier unit
may be defective. This error can
also be caused by external noise.
See the chapter on noise
reduction in "Descriptions."
302
A communication error (STBER)
for the serial pulse coder was
detected.
Check the continuity of the signal
cable. If the cable is normal, the
pulse coder or servo amplifier unit
may be defective. This error can
also be caused by external noise.
See the chapter on noise
reduction in "Descriptions."
303
An LED disconnection (LDAL) was
detected in the serial pulse
coder.
Turn the power off. If this alarm
recurs when the power is
reapplied, replace the motor.
304
A mispulse alarm (PMAL) for the
serial pulse coder was detected.
Turn the power off. If this alarm
recurs when the power is
reapplied, replace the motor.
305
A miscount alarm (CMAL) for the
serial pulse coder was detected.
Turn the power off. If the alarm
recurs when the power is
re-applied, replace the motor.
Even if the alarm does not recur,
restart the operation from referenc
e position return.
306
The motor has overheated
(OHAL).
This alarm is issued when the
motor has overheated, causing the
thermostat to trip.
Possible causes include an
excessively high ambient
temperature and excessively strict
operating conditions. Check the
actual cause.
If it occurs again when the motor
is cooled, the motor or servo
amplifier may have failed. Replace
the faulty motor or servo
amplifier.
308
A soft phase alarm (SPHAL) was
detected.
Turn the power off. This alarm
may be caused by noise.