Inovance SV820N Series - Page 108

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5 Troubleshooting
5
Probable Cause ConrmingMethod Corrective Action
2. Connection
of the
encoder cable
becomes
loose.
Checkwhethertheon-sitevibrationistoolarge,resulting
in encoder cable loosening and potential damage to the
encoder.
Re-connect the encoder cable
securely.
3. Interference
on Z signal of
the encoder
exists.
Checkon-sitewirings:
Checkwhetherlargeequipmentisgeneratinganinterference
on-site and whether there are interference sources such as
various variable-frequency devices inside the cabinet.
Set the servo in "Rdy" state, then manually rotate the motor
shaftanti-clockwise,andmonitorwhetherthe200B-12h
(electrical angle) increases or decreases smoothly while
number of 0-360° within one revolution is 5.
(This is for Z series motors, and for X series motors the
number should be 4.)
If 200B-12h changes abnormally during rotation, it indicates
that a fault occurs on encoder.
If there is no alarm during rotation but the system alarms
duringservorunning,itislikelythatinterferenceexists.
Preferably use the cables
recommended by Inovance.
If a non-standard cable is used,
checkwhetherthecablemeets
the requirements and is an STP
cable.
Do not bundle motor cables and
encoder cables together. Ensure
the servo motor and servo drive
are well grounded.
Checkthattheconnectorsatboth
ends of the encoder are in good
contact.
4. The encoder
is faulty.
Use a new encoder cable. If the fault no longer occurs after
replacement, it indicates that the original encoder cable is
damaged.
Place motor at the same position, power on the system
several times and observe change of 200B-12h. The
electrical angle must be within ±30°.
Use a new encoder cable.
Replace the servo motor if the
encoder is faulty.
■ E3.A33: Encoder reads and writes data abnormally
Cause:
Internal parameters of the encoder are abnormal.
Probable Cause ConrmingMethod Corrective Action
1. The serial incremental
encodercablebreaksor
becomes loose.
Checkwirings.
Checktheconnectionoftheencoder
cable to see whether there is an incorrect
connection,brokenwiring,orapoor
contact. If motor cables and encoder cables
are bundled together, separate them.
2. Reading and writing of
the series incremental
encoder parameters are
abnormal.
If the servo drive is powered off and on
several times but the fault persists, it
indicates that the encoder is faulty.
Replace the servo motor.
■ E3.B00: Position deviation excess
Cause:
The position deviation is larger than the setting of 6065h in position control mode.
Probable Cause ConrmingMethod Corrective Action
1. Power output
(UVW) phase loss
or incorrect phase
sequence occurs in
the servo drive.
Perform motor trial running when there is no load
andcheckthemotorwirings.
Correct the wiring or replace the
cables.