
FANUC SERVO AMPLIFIER βi series I/O Link Option
Modification from I/O Link β
EDIT
DRAW. NO. CUST
TITLE
DESCRIPTION
DESIG.
DATE
A-79487E
15
23
01
04.03.15
SHEET
Newly designed
No. LED display
Description
Countermeasure
DC Link Over Voltage Alarm
has been issued.
This alarm is issued when the DC
voltage of the main circuit power
is too high.
413
(1) When SVM1-4
i
or SVM1-20
i
is used, and a separate regenerative
discharge unit is not used, check the specification to see
if regenerative energy per one time does not exceed the
allowable regenerative energy of the servo amplifier unit.
(2) For the SVM1-40
i
and the SVM1-80
i
, when the separate
regenerative discharge resistor is not used, check whether
the CZ6 connector is short-circuited with a dummy connector.
(3) The supply voltage for dynamic power may exceed the rated
value. Check the voltage. If the voltage is too high, reduce
the voltage to an appropriate level.
(4) The regenerative discharge unit may not be properly connected.
Check the connection.
(5) The resistance of the separate regenerative discharge unit may be
abnormal. Disconnect the separate regenerative discharge unit,
then check the resistance. If the resistance is not within +20% of
the predetermined resistance, replace the separate regenerative
discharge unit.
(6)
If from (1) to (5) are not the cause of the alarm, replace the serv
o
amplifier unit.
DC Link Low Voltage Alarm has
been issued.
This alarm is issued when the DC
voltage of the main circuit power
is too low.
414
(1)
190 ms or longer may pass from the time when both the *ESP
of the built-in DI and the *ESP of the I/O link interface signal are
canceled until the external magnetic contactor inserted into the
input for motive power turns on(including the operating time of
the magnetic contactor). The magnetic contactor must turn on
within 100 ms.
(2)
The external circuit breaker may be turned off. Check the circuit
breaker.
(3)
The supply voltage for dynamic power is lower than the rated
value. Check the voltage. If the voltage is too low, increase it to
an appropriate level.
(4)
The external magnetic contactor may not be connected properly.
Check the connection.
(5)
If from (1) to (4) are not the cause of the alarm, replace the ser
vo
amplifier unit.