Inovance SV820N Series - Page 101

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5 Troubleshooting
5
■ E3.234: Runaway
Cause:
Thetorquereferencedirectionisreversedtothespeedfeedbackdirectioninthetorquecontrolmode.
Thespeedfeedbackdirectionisreversedtothespeedreferencedirectioninthepositionorspeedcontrol
mode.
Probable Cause ConrmingMethod Corrective Action
1. UVW phase sequence is
incorrect.
Checkwhethertheservodrivepower
cables are in the same phase sequence
as the servo drive UVW cables and
motor UVW cables.
Connect the UVW cables according
to the correct sequence.
2. When the power is turned on, the
interference signal causes the
motor rotor to detect the initial
phase error.
The UVW phase sequence is correct,
but E3.234 occurs when the servo drive
is turned on.
Power on the servo drive again.
3. The encoder model is set
incorrectly or the wiring is
incorrect.
View the servo drive and servo motor
nameplatestocheckthattheequipment
used is the Inovance SV820 series servo
drive and 20-bit servo motor (-U2***).
Use the matching servo drive
and servo motor. If you use the
Inovance SV820 series servo drive
and 20-bit servo motor, ensure
that 2000-01h=14000. Correct the
motor model, encoder type, and
encoder wiring.
4. The encoder cable is incorrectly
wired, corrosive, or inserted
loosely.
Checkwhethertheencodercable
is used according to the standard
conguration.Checkwhetherthecable
is aging, corrosive or loose.
Turn off the S-ON signal, rotate the
motorshaftmanually,andcheckwhether
200B-12h (electrical angle) changes as
the motor rotates.
Re-weld, fasten or replace the
encoder cable.
■ E3.400: Main circuit overvoltage
Cause:
The DC bus voltage between P and N exceeds overvoltage threshold.
220Vdrive:Normalvalue:310V,overvoltagethreshold:420V.
Probable Cause ConrmingMethod Corrective Action
1. The main circuit input
voltage is too high.
Measure whether the input voltage of the
servo drive main circuit (RST) is within
thefollowingspecications:
220Vdrive:
Effectivevalue:220V–240V
Allowederror:–10%to+10%
(198 V to 264 V)
Replace or adjust the power supply
accordingtothespecications.
2. The power supply is
instable or affected by
lightning.
Checkwhetherthepowersupply
is unstable, affected by lightning or
satisestheprecedingspecications.
Connect a surge suppressor and then the
power supply. If the fault persists, replace
the servo drive.