−
65
−
Protection
Overvoltage
error
(continued)
Undervoltage,
main power
Alarm
Code No.
12
13
Cause
① The internal regenerative
discharge resistor is disconnected.
② The external regenerative discharge
resistor is not suitable so that
regenerative energy cannot be
absorbed.
③ The driver (circuit) failed.
The P-N voltage of the main power
converter is lower than the specified
value during Servo-ON.
① The main power line voltage is too
low, an instantaneous outage
occurred, the power source is too
small, the main
power is turned off, or the main power
is not fed.
② Too small power source: the line
voltage dropped due to the inrush
current at power on.
Countermeasures
① Measure the P-B1 resistance of the
driver using a circuit tester. If it
read ∞ , the connection is broken.
Replac the driver. Insert an external
regenerative discharge resistor
between the P and B2 terminals.
②Use a resistor having the specified
resistance for specified Watt.
③Replace with a new driver (that is
working correctly for another axis).
Measure the terminal-to-terminal
voltages (between L1, L2 and L3).
① Increase the capacity of the main
power or replace it with a larger one.
Or remove the causes of the failure
of the magnetic contact, and then
restart the power source.
② Increase the capacity of the main
power. For the required capacity,
see "List of Applicable Components".
③Correct the phase (L1, L2 and L3)
connections of the main power. If the
main power is single-phase 100V, use
L1 and L3.
④Check the timing of power-on (for both
the main power and control power).
Important
information
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