Protective
function
Error code No.
Causes
Measures
Main Sub
6-4
Under voltage
protection of
control power
supply
11
0
Voltage between P and N of converting
unit of control power supply has fallen
down and dropped below specified value.
100 V version:
approx.
200 VDC (
approx.
140 VAC)
200 V version:
approx.
400 VDC (
approx.
280 VAC)
1) Low power supply voltage. Occurrence
of momentary power failure.
2) Power capacity shortage…Due to rush
current at the main power-on, power
supply voltage has fallen down.
3) Servo driver failure (circuit failure)
Measure L1C-L2C line voltage of connector
and terminal block
1) Increase the capacity of power supply
voltage. Change the power supply.
2) Increase the power capacity.
3) Replace with new servo driver.
Over-voltage
protection
12
0
Voltage between P and N of the
converter portion of the control power
supply has exceeded the specified value
100 V version:
approx.
200 VDC (
approx.
140 VAC)
200 V version:
approx.
400 VDC (
approx.
280 VAC)
1) Power supply voltage has exceeded
the permissible input voltage. Voltage
surge due to the phase-advancing
capacitor or UPS (Uninterruptible
Power Supply) have occurred.
2) Disconnection of the regeneration
discharge resistor
3)External regeneration resistor is not
appropriate and could not absorb the
regenerative energy.
4) External regeneration discharge
resistor is not appropriate and could
not absorb the regeneration energy.
5) Failure of servo driver (failure of the
circuit)
Measure the voltage between lines of
connector (L1, L2 and L3).
1) Enter correct voltage. Remove a phase-
advancing capacitor.
2) Measure the resistance of the external
resistor connected between terminal P - B
of the driver. Replace the external resistor
if the value is ∞.
3) Change the specified regeneration
resistance value to wattage.
4) Change to the one with specified
resistance and wattage.
5) Check that Pr0.16.
Main power
supply
under-
voltage
protection
(PN)
13
0
Instantaneous power failure has occurred
between L1 and L3 for longer period than
the preset time with Pr5.09 (Main power
off detecting time) while Pr5.08 (LV trip
selection at the main power-off) is set
to 1. Or the voltage between P and N of
the converter portion of the main power
supply has fallen below the specified
value during Servo-ON.
100 V version:
approx.
80 VDC (
approx.
55 VAC)
200 V version:
approx.
110 VDC (
approx.
75 VAC)
1) Power supply voltage is low.
Instantaneous power failure has
occurred
2) Instantaneous power failure has
occurred.
3) Lack of power capacity...Power supply
voltage has fallen down due to inrush
current at the main power-on.
4) Phase lack...3-phase input driver has
been operated with single phase input.
5) Failure of servo driver (failure of the circuit)
Measure the voltage between lines of
connector (L1, L2 and L3).
1) Increase the power capacity. Change the
power supply. Remove the causes of the
shutdown of the magnetic contactor or the
main power supply, then re-enter the power.
2) Set up the longer time to Pr5.09 (Main
power off detecting time). Set up each
phase of the power correctly.
3) Increase the power capacity. For the capacity,
refer to P.2-10, "Driver and List of Applicable
Peripheral Equipments" of Preparation.
4) Connect each phase of the power supply
(L1, L2 and L3) correctly. For single phase,
100 V and 200 V driver, use L1 and L3.
5) Replace the driver with a new one.
Main power
supply
under-
voltage
protection
(AC)
1
Related page
• P.2-12... “System Configuration and Wiring” • P.4-6 to P.4-85... “Details of parameter”
6
1. When in Trouble
When in Trouble
Protective function (Detail of error code)
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