
3. TROUBLESHOOTING
AND ACTION TROUBLESHOOTING B-65165E/02
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3.4.1.6 Alarm code 07
The motor rotates at a speed exceeding 115% (standard setting) of the
maximum allowable speed.
(1) If this alarm is issued during spindle synchronization
If the activation (SFR, SRV) of the motor on one side is turned off
then back on in the spindle synchronization mode, the spindle
motor is accelerated to correct a position error built up during the
period, thus causing this alarm. Modify the ladder so that SFR
and SRV are not turned off in the spindle synchronization mode.
(2) If this alarm is issued while the motor is stopped
(a) The connection cable of the spindle sensor is faulty.
Check if the cable of the spindle sensor built into the motor
(BZ sensor when a built-in motor is used) is disconnected,
and replace the cable as required.
(b) The spindle sensor built into the motor is not adjusted
correctly.
Adjust the sensor according to Subsection 4.3.4 of Part I.
3.4.1.7 Alarm code 09
The temperature of the heat sink of the SPM main circuit has risen to
the set value. This alarm is issued for SPM-15 and up or SPM-15HV
and later. With SPM-2.2 to SPM-11 and SPM-11HV, however, alarm
code 12 is issued for the same cause.
(1) If this alarm is issued during cutting (the heat sink temperature is
high)
(a) If this alarm is issued when the load meter reads a value
below the continuous rating of the amplifier, check the
cooling state of the heat sink.
<1> If the cooling fan is stopped, check the power supply
(connector CX1A/B). If the cooling fan is still
inoperative, replace the SPM with a new one.
<2> When the ambient temperature is higher than the
specified temperature, lower the ambient temperature
to satisfy the specification.
(b) When this alarm is issued because the load meter reads a
value above the continuous rating of the amplifier, improve
the use method.