12-25
12-4 Troubleshooting
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
12
Troubleshooting and Maintenance
Troubleshooting Using the Operation State
Symptom Probable cause Items to check Measures
The 7-segment display
does not light.
The control power is not
supplied.
Check to see if the power
supply input is within the
allowed power supply voltage
range.
Supply the correct power
supply voltage.
Check to see if the power
supply input is wired correctly.
Wire correctly.
The ERR indicator flashes
or lights.
A communications-related
error occurred.
Refer to Troubleshooting Errors Related to EtherCAT
Communications on page 12-24.
The L/A IN and the L/A
OUT indicators are OFF.
A link in the EtherCAT
physical communications
layer has not been
established yet.
Check to see if the
communications cable is
connected correctly.
Connect the
communications cable
correctly.
Check to see if the host
controller has started.
Start the host controller.
An error occurred. Read the error number and
the error log.
Check the cause listed in
Troubleshooting with Error
Displays on page 12-13.
Take appropriate
measures against the
cause of the error that
are listed in
Troubleshooting with
Error Displays on page
12-13.
The servo does not lock. The power cable is not
connected correctly.
Check to see if the
Servomotor power cable is
connected properly.
Wire the Servomotor
power cable correctly.
The Servomotor power
supply is not ON.
Check the main circuit wiring
and power voltage.
Input the correct power
and voltage for the main
circuit.
The Forward or Reverse
Drive Prohibition Input (POT
or NOT) is OFF.
• Check to see if the input for
Forward or Reverse Drive
Prohibition Input (POT or
NOT) is OFF.
• Check the input of +24 VIN
to CN1.
• Turn ON POT and
NOT. Input +24 VIN to
CN1.
The torque limit is set to 0. Check to see if the torque
limits in the Positive torque
limit value (60E0 hex) and the
Negative torque limit value
(60E1 hex) are set to 0.
Set the maximum torque
to be used for each of
these objects.
The Servo Drive has broken
down.
− Replace the Servo Drive.
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