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9. TROUBLESHOOTING
Display
Name
Definition
Cause
Action
(Note 2)
Alarm details
(Note 1)
88888
Watchdog
CPU, parts faulty
1. Fault of parts in driver
<Checking method>
Alarm (88888) occurs if power is
switched on after disconnection of all
cables but the control circuit power
supply cable.
Change the driver.
2. The CPU in the servo motor is
malfunctioned due to external noise.
1. Check that the driver is
not influenced by noise of
magnetic valves,
magnetic contactors or
relays.
2. Check the grounding of
the driver and the servo
motor.
Note 1. At power-on, "88888" appears instantaneously, but it is not an error.
2. Software (MR Configurator2
TM
) is required to check the alarm detailed information. The alarm detailed information can be
checked on the "alarm history list" window. The window appears by slecting alarm/alarm history on software (MR
Configurator2
TM
).