Prossible causes of this type of alarm are listed in the table:
Cause
Check
Motor short circuit
Use a multimeter or other suitable instrument to check motor insulation. Alternatively:
• Remove the motor power cable
• Enable the axis again
• If the problem is remedied, replace the motor
Short circuit between
the motor cables.
Disconnect the cable from the motor and drive and use a multimeter or other suitable
instrument to check cable insulation. Alternatively:
• Remove the motor power cable on the drive side
• Enable the axis again
Wrong current loop
regulation
Check the motor parameters entered in the drive con
�
guration.
Damaged internal drive
components
If the problem persists after carrying out all checks, replace the drive.
6.3.2. Alarm due to VBUS voltage not within tolerance limits
Fault
Cause
Check
DC_Link_Under Voltage Voltage beneath minimum
threshold set
Circuit reading fault
Measure the voltage on the DC
BUS and compare with that
measured by the drive.
DC_Link_Over Voltage
Voltage higher than the
maximum value permitted.
Brake resistor is not connected
to the power supply module or
is faulty
Measure the ohmic value of
the resistor and replace it if
necessary.
WARNING
In the case of controlled braking, the kinetic energy available is regenerated on the BUS DC and partly stored in the
capacitors; the excess, if not dissipated by the braking resistor (RR on the power supply), can result in DC_Link_Over
Voltage. It is advisable to disable the axis to avoid any damage to the drives.
AVERTISSEMENT
Dans le cas de freinage contrôlé, l'énergie cinétique disponible est régénérée sur le bus DC et en partie stockée
dans les condensateurs; l'excès, sinon dissipé par la résistance de freinage (RR sur l'alimentation), peut entraîner
"DC_Link_Over _Voltage ". Il est conseillé de désactiver l'axe pour éviter d'endommager les unités
6.3.3. Drive or motor over-temperature
•
excess_temperature_drive
•
motor_temperature_warning
•
motor_over_temperature
If a drive or motor over-temperature is reported, the cause of the problem must be analysed based on the table:
Cause
Check
The drive temperature is
high (above 50 °C)
• Check the ef
�
ciency of the cooling fans; replace if they do not work;
• Check the direct current of the module axes; if above the required value, check the operating
status of the machine
The motor temperature is
high (above 85 °C on the
motor structure)
• Check there are no variations in the machine operating cycle; check whether control
parameters are no longer suitable for the application
• Check that motor timing has not changed
The drive temperature is
low (below 50 °C)
Possible fault in the temperature reading inside the circuit
The motor temperature
is low (below 60 °C on the
motor structure)
MAR2-E-191
73
fi
Possible fault on the internal thermal sensor or a thermal protection configuration (using
software)
