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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
13.6.2 Drive unit
POINT
Explanation made in this section is exclusively for the driver unit.
Other troubleshooting is the same as that for servo amplifiers with 22kW or
less. Refer to chapter 8.
As soon as an alarm occurs, make the Servo off status and interrupt the main
circuit power.
(1) Alarms and warning list
When a fault occurs during operation, the corresponding alarm or warning is displayed. If any alarm or
warning has occurred, refer to (2) or (3) of this section and take the appropriate action. When an alarm
occurs, the ALM turns OFF.
After its cause has been removed, the alarm can be deactivated in any of the methods marked in the alarm
deactivation column. The alarm is automatically canceled after removing the cause of occurrence.
Alarm deactivation
Display Name
Display Name
Power
OFF
ON
Error reset CPU reset
9C
Converter
warning
Alarms 1B
Converter
alarm
Alarms
E9
Main circuit off
warning
(2) Remedies for alarms
CAUTION
When any alarm has occurred, eliminate its cause, ensure safety, then reset the
alarm, and restart operation. Otherwise, injury may occur.
As soon as an alarm occurs, mark servo-off and power off the main circuit and
control circuit.
POINT
The alarm can be deactivated by switching power off, then on or by the error
reset command CPU reset from the servo system controller. For details, refer
to (1) of this section.
When an alarm occurs, the trouble (ALM) switches off and the dynamic brake is operated to stop the servo
motor. At this time, the display indicates the alarm No.
The servo motor comes to a stop. Remove the cause of the alarm in accordance with this section. MR
Configurator may be used to refer to the cause.
Display Name Definition Cause Action
1. An alarm occurred in the converter
unit during servo on.
Check the alarm of the converter
unit, and take the action following
the remedies for alarms of the
converter unit. (Refer to section
13.6.1 (2).)
1B Converter
alarm
An alarm occurred in the
converter unit during servo
on.
2. The protection coordination cable or
terminal connector is not correctly
connected.
Connect correctly.