5 Troubleshooting
5
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Cause
Confirming Methods
Corrective Action
2. AI wiring is
incorrect or
interference exists.
Check AI wiring according to correct
wiring diagram.
Use shielded twisted pair cable and shorten cable
length.
Increase AI filter time constant:
AI1 filter time constant: H03-51
AI2 filter time constant: H03-56
Er.835: High-accuracy AD sampling fault
Cause
Confirming Methods
Corrective Action
1. Interference exists on high-
accuracy AI.
Check AI wiring according to correct
wiring diagram.
Use shielded twisted pair cable and
shorten cable length.
Er.A33: Encoder data abnormal
Cause
Confirming Methods
Corrective Action
1. The serial encoder cable
breaks or becomes loose.
Check wirings.
Check connection of encoder cable to
see whether incorrect connection, wire
breaking, or poor contact exists. If motor
cables and encoder cable are bundled
together, separate them.
2. Serial encoder parameters
read-write is abnormal.
If the fault persists after you power on
servo drive several times, it indicates
that the encoder is faulty.
Replace servo motor.
Er.A34: Encoder communication check abnormal
Cause
Confirming Methods
Corrective Action
1. Servo drive model and
servo motor model do not
match.
View servo drive and servo motor nameplates to
check that the equipment you are using is IS650P
series servo drive and 20-bit servo motor (-U2***)
of Inovance. Meanwhile, check whether H00-00
(Motor SN) is 14000.
Replace matching servo drive
and servo motor.
2. Encoder cable breaks.
Check whether encoder cable breaks and whether
connection of servo drive and connection of servo
motor are secure.
Replace a new encoder cable
and secure wirings.
Er.A35: Z signal lost
Cause
Confirming Methods
Corrective Action
1. Z signal gets lost because of
encoder fault.
Use a new encoder cable and
connect wirings correctly. Then
rotate motor shaft manually and
check whether the fault persists.
Replace servo motor.
Poor contact or incorrect connection
results in Z signal lost.
Rotate motor shaft manually and
check whether the fault persists.
Check whether encoder cable is in
good contact. Re-connect wirings or
replace encoder cable.
Er.B00: Position deviation being large
Cause
Confirming Methods
Corrective Action
1. Power output phase
(UVW) loss or incorrect
phase sequence occurs
on servo drive.
Perform motor trial running when there is
no load and check motor wirings.
Connect wirings correctly again or replace
them.
Summary of Contents for IS650P Series
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