12-18
12-4 Troubleshooting
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
12
Troubleshooting and Maintenance
27
1
Absolute
Value
Cleared
The multi-rotation counter for the absolute
encoder was cleared during USB
communications by the CX-Drive.
• Check to see if the multi-rotation counter
for the absolute encoder was cleared
during USB communications by the CX-
Drive.
Note: This operation is performed for
safety and is not an error.
4
Command
Error
The position command variation after the
electronic gear is higher than the specified
value.
• Check to see if the position command
variation is large.
• Check the electronic gear ratio.
• Check to see if the backlash
compensation amount is too large.
5
Command
Generation
Error
During position command processing, an
error such as an "over the calculation
range" error occurred.
Check to see if the electronic gear ratio,
and the acceleration and deceleration
rates meet the restrictions.
6
Operation
Command
Duplicated
An attempt was made to establish
EtherCAT communications (change from
Init to Pre-Operational state) or to turn ON
the servo from the controller (enable
operation) while executing an FFT that
operates with the Servo Drive alone or a
trial run.
Check to see if EtherCAT
communications is established or the
servo is turned ON (enable operation)
while an FFT or a trial run was being
conducted.
7
Position Data
Initialized
A Config operation was performed or the
multi-rotation counter was cleared for the
absolute encoder during EtherCAT
communications.
Check to see if Config operation was
performed or the multi-rotation counter
was cleared for the absolute encoder
during EtherCAT communications.
Note: This operation is performed for
safety and is not an error.
29
1
Error Counter
Overflow 1
The value that is obtained by dividing the
absolute encoder position (in pulses) by
the electronic gear ratio exceeded ±2
31
(2,147,483,648) during the initialization of
position data, after the control power was
turned ON in absolute value mode, after a
Config operation, after FFT was executed,
or after a trial run was executed.
Review the operation range of the
absolute external encoder position and
the electronic gear ratio.
2
Error Counter
Overflow 2
The position error in pulses exceeded
±2
29
(536,870,912). Alternatively, the
position error in command units exceeded
±2
30
(1,073,741,824).
• Check to see if the Servomotor rotates
according to the position command.
• Check on the torque monitor to see if the
output torque is saturated.
• Adjust the gain.
• Maximize the set values on the Positive
torque limit value (60E0 hex) and the
Negative torque limit value (60E1 hex).
• Wire the encoder as shown in the wiring
diagram.
30
(st)
0
Safety Input
Error
At least one of the input photocouplers for
safety inputs 1 and 2 turned OFF.
Check the input wiring of safety inputs 1
and 2.
Error No. (hex)
Name Cause Measures
Main Sub
ABS
ABS
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