LS ELECTRIC L7NHF Series, Руководство пользователя

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12. Maintenance and Inspection
12-5
12.2.2
Servo Drive

Servo Alarms
If the drive detects a problem, it triggers a servo alarm and transition to the servo off state for a stop. In this
case, the setting value of emergency stop configuration (0x2013) is used to stop the drive.
Alarm Code Names Causes Inspection Items Measures to Take
IPM fault
(Overcurrent (H/W))
Over current
(Overcurrent (S/W))
Current limit exceeded
(Overcurrent (H/W))
Motor cable abnormality
Check for abnormal wiring and
short circuit.
Replace the motor cable.
Encoder cable
abnormality Check for abnormal wiring and
short circuit.
Replace the encoder cable.
Parameter setting
abnormality
Motor ID [0x2000], encoder type
[0x2001], and encoder type
[0x2002] settings should be the
same as the motor label
information.
Modify the parameters so that they
match the information on the motor
label.
Motor phase resistance
inspection
Inspect resistance between motor
lines
(U-V, V-W, W-
U below several Ω)
Replace the motor.
Apparatus abnormality
Determine whether there are
conflicts or binding among the
apparatuses.
Inspect the apparatuses.
Drive abnormality
-
If alarms occur continually after
power cycling, replace the drive
since there may be abnormalities in
the drive.
Noise-related
abnormalities
Improve the noise-related
environment including wiring and
installation.
Check the wiring of the PE.
Adjust the PE wiring size so that it
matches the size of the drive main
circuit wiring.
IPM temperature
(IPM Overheat)
Ambient temperature
Check if the ambient temperature
exceeds 50[
℃
].
Lower the temperature around the
drive.
Continual overload alarm
Check if the load is lower than
100% by the accumulated
operation overload ratio value
[0x2603].
Change the capacity of the drive and
motor.
Adjust gain.
Highly frequent
regenerative operation or
continual regenerative
operation
Check accumulated regeneration
overload ratio [0x2606].
Adjust the setting value for
regeneration brake resistor
configuration [0x2009].
Use an external regeneration brake
resistor.
Installation direction of
the drive Check the installation status of
the drive. Refer to Section 2. “Wiring and
Connection .”
Drive abnormality
-
If alarms occur continually after
power cycling, replace the drive
since there may be abnormalities in
the drive.
Current offset
(Current offset
Excessive setting of the
motor’s U and V Phase
current offset
Check whether the U, V, W phase
current offsets [0x2015] -
[0x2017] are 5% of the rated
current or higher.
Re-adjust phase current offset.