Inovance SV820N Series - Page 109

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5 Troubleshooting
5
Probable Cause ConrmingMethod Corrective Action
2. The servo drive UVW
cable or the encoder
cablebreaks.
Checkwirings.
Reconnect the UVW cables. The
servo motor UVW cables must be
connected to the servo drive UVW
cables correspondingly. If necessary,
replace all cables and ensure a
reliable connection.
3. Locked-rotoroccurs
due to mechanical
factors.
Checktherunningreferenceandmotor
speed (200B-01h) through Inovance servo
commissioningsoftwareorthekeypad:
Runningreferenceinpositioncontrol:200B-0Eh
(Input position reference counter)
Runningreferenceinspeedmode:200B-02h
(Speed reference)
Runningreferenceintorquemode:200B-03h
(Internal torque reference)
Checkthattherunningreferenceisnot0butthe
motor speed is 0 in the corresponding mode.
Eliminate mechanical factors.
4. The servo drive gain
is too low.
Checkthepositionloopgainandspeedloopgain
of the servo drive.
1stgain:2008-01hto2008-03h
2ndgain:2008-04hto2008-06h
Adjust the gain manually or perform
gain auto-tuning.
5. The position
reference increment
is too large.
Positioncontrolmode:
In CSP mode, view the gear ratio 6091-01h/6091-
02htocheckthespeedreferenceincrementfora
single synchronous cycle and convert it to speed.
In PP mode, view the gear ratio 6091-01h/6091-
02handcheckthevalueof6081h(prole
velocity).
In HM mode, view the gear ratio 6091-01h/6091-
02h, and determine 6099-01h and 6099-02h.
CSP:Decreasethepositionreference
increment for a single synchronous
cycle, and the host controller needs to
increase the position ramp additionally
when generating references.
PP:Decreasethevalueof6081h,
or decrease the acceleration/
deceleration ramp (6083h, 6084h).
HM:Decrease6099-01hand6099-
02h, or decrease the acceleration/
deceleration ramp (609Ah).
Decrease the gear ratio according to
the actual conditions.
6. Relative to the
running condition,
6065h (following
error window) is too
small.
Checkwhetherthesettingof6065histoosmall. Increase the value of 6065h.
7. The servo drive or
motor is faulty.
Monitor the running curve through the oscilloscope
function in Inovance servo commissioning
software:
Positionreference,positionfeedback,speed
reference, torque reference
If the position reference is not 0, but
thepositionfeedbackisalways0,
replace the servo drive or motor.