Maintenance 9. Troubleshooting
4222
RAM failure of the servo CPU.
Reboot the controller. Check for
Reboot the controller, take the measure
against noise, or replace the DMB board.
4223
Failure of duplicate circuit of the
emergency stop or the safeguard.
Check the wiring of the emergency stop
Low voltage of the main circuit power
supply is detected. Check the power
supply voltage.
Check the power supply voltage, or
reboot the controller.
4225
Control relay contact of the main
circuit power supply is welded.
Replace the DPB board.
4230
Servo real time status failure.
Check sum error.
A data checksum error was detected in
the controller.
Check the short-
circuit and improper
connection of the peripheral equipment
Expansion I/O connectors)
4232
Servo real time status failure. Free
running counter error with the servo.
A free running counter error was detected
in the controller.
Check the short-
connection of the peripheral equipment
wiring. (Emergency, D-
Expansion I/O connectors)
Replace the controller.
4233
Servo real time status failure
.
Communication error with the servo
CPU.
A communication error was detected in
the controller.
Check the short-
circuit and improper
connection of the peripheral equipment
Expansion I/O connectors)
4240
Irregular motion control interruption
was detected.
Interruption duplicate.
A interruption error was detected in the
controller.
Check the short-
circuit and improper
connection of the peripheral equipment
Expansion I/O connectors)
Over speed during low power mode
The robot over speed was detected during
Check the robot mechanism.
(Smoothness, backlash, non-smooth
motion, loose belt tension, brake)
Check whether the robot does not
interfere with peripheral equipment.
(Collision, contact)
Replace the motor driver.
R
eplace the motor. (Motor and encoder
failure)
Check the short-
circuit and improper
connection of the peripheral equipment
I/O, and
Expansion I/O connectors)
RC90 (EPSON RC+ 7.0) Rev.4
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