Panasonic MINAS E-series - Manual (Page 145)

145
[Trouble Case]
T
rouble Case
Protective
Functions
Power
voltage
shortage
protection
(LV)
Over-
voltage
protection
(OV)
Over-
current and
ground
fault
protection
(OC)
Internal
resistor
heating
protection
(ROH)
Alarm
code No.
11
12
14
15
Cause
During Servo-ON, voltage between P-N of the
converter of the main power supply has dropped
below a specified value.
(1) Supply voltage is low. Momentary trip has
occurred. Voltage source capacity is short.
Supply voltage drops as a result of shutoff of
the main power supply. The main power
supply is de-energized.
(2) Insufficient voltage source capacity ---Supply
voltage has dropped due to inrush current
generated when the main power supply was
turned on.
(3) Lack of phase --- The driver that has a
requirement for three-phase input is run at
single phase.
(4) Failure of the driver (the circuit failed.)
Supply voltage exceeds allowable input voltage
range. The P-N voltage of the converter unit
exceeds a specified value. Supply voltage is high.
Voltage surged due to the phase-advanced
condenser or UPS (uninterruptible power supply).
(1) Disconnection of a regenerative resistor
(2) Regenerative energy cannot be absorbed due to
improper selection of an external regenerative
resistor.
(3) Failure of the driver (the circuit failed.)
The current running through the converter
exceeds a specified value.
(1) Failure of the driver (Defective circuit, IGBT
component, etc.)
(2) Short circuit of motor wires U, V, W
(3) Earth fault of the motor wire
(4) Burnout of the motor
(5) Poor contact of the motor wires
(6) The relay for dynamic brake is melted and
stuck due to frequent Servo-ON/OFF
operation
(7) The motor is not compatible with the driver.
(8) Timing of the pulse input and Servo-ON is
same or the former is faster.
The resistor inside the driver was abnormally
overheated.
Action
Measure the line voltage of the connector CN X1
(L1, L2, L3).
(1) Increase the supply voltage. Replace the
power supply. After removing a cause of the
drop of the electromagnetic contactor of power
supply, power on again.
(2) Increase the voltage source capacity. For
voltage source capacity, refer to “List of Driver
and Compatible Peripheral Equipment” on
Page 26.
(3) Correctly connect respective phases of supply
voltage (i.e., L1, L2, and L3). Use L1 or L3 in
the case of requirement for single-phase input.
(4) Replace the failed driver with new one (i.e.,
driver that is running on other axis).
Measure the line voltage of the connector CN X1
(L1, L2, and L3). Solve the problem and supply
correct voltage. Remove the phase-advanced
condenser.
(1) Using a tester, measure an ohmic value of the
external regenerative resistor. When it is ∞, it
is disconnected. Replace the regenerative
resistor.
(2) Change to a resistor of specified ohmic value
and rated power.
(3) Replace the failed driver with new one (i.e.,
driver that is running on other axis).
(1) If a failure occurs immediately after you
remove the motor wire and activate Servo-ON,
replace the driver with a new one (that is
running).
(2) Check if U, V, or W is not shorted, in particular,
whether of the lead wire of the connector has
any branched out wire. Connect the motor
wires correctly.
(3) Measure insulation resistance between the
motor wires U, V, W and earthing conductors
of the motor. In case of bad insulation,
replace the motor.
(4) Measure respective line resistance of the
motor. If they are unbalanced, replace the
motor.
(5) Check for falling out of connector pins for
connection of U, V, and W. Securely fix
loosened or fallen out pins.
(6) Replace the driver. Do not start or stop the
motor by turning Servo ON and OFF.
(7) Check a part number (capacity) of the motor
and driver on the nameplate. Change to the
motor right for the driver.
(8) Waiting 100ms or longer after turning on
Servo-ON, activate pulse.
Refer to “Timing Chart” on Page 32 of
Preparation edition.
Check ambient temperature and cooling
conditions of the driver. Improve the surroundings
appropriate to use conditions of the driver. Check
operating sound of the relay at power-on. If you
hear no operating sound, replace the driver.
Details of Protective Functions