Omron R88D-KN ML2 Sries User Manual page 434

11-4 Troubleshooting
Alarm
number
Main Sub
Main power supply
undervoltage
0
(Insufficient voltage
between P and N)
13
Main power supply
1 undervoltage
(AC cut-off detection)
11
11-15
Name
If the Undervoltage Alarm Selection
(Pn508) is set to 1, a momentary
power interruption occurred between
L1 and L3 for longer than the value
specified for the Momentary Hold
Time (Pn509). Alternatively, the
voltage between the positive and
negative terminals in the main power
supply converter dropped below the
specified value while the servo was
ON.
100-V products: Approx. 80 VDC
(Approx. 55 VAC)
200-V products: Approx. 110 VDC
(Approx. 75 VAC)
400-V products: Approx. 180 VDC
(Approx. 125 VAC)
• The power supply voltage is low.
• A momentary power interruption
occurred.
• Insufficient power supply capacity:
the power supply voltage dropped
because there was inrush current
when the main power supply was
turned ON.
• Phase-failure: a Servo Drive with
3-phase input specifications was
operated with single-phase power
supply.
• The Servo Drive is faulty (circuit
fault).
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
Cause
Measure the voltage between the
connector (L1, L2, and L3) lines.
• Increase the power supply voltage.
Change the power supply.
Eliminate the cause of the failure of
the electromagnetic contactor on
the main circuit power supply, and
then turn ON the power again.
• Check the setting of the
Momentary Hold Time (Pn509).
Set each phase of the power
supply correctly.
• Increase the power supply
capacity. Refer to 2-3-1 Servo
Drive Model List on page 2-5 for
information on the power supply
capacity.
• Connect each phase (L1, L2, and
L3) of the power supply correctly.
Use L1 and L3 for single-phase
100 V and single-phase 200 V.
• Replace the Servo Drive.
Measures