5 Troubleshooting
5
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Er.234: Runaway
Cause
Confirming Methods
Corrective Action
1. UVW phase
sequence is incorrect.
Check whether UVW phase sequence on
servo drive is consistent with that on motor
side.
Connect UVW cables according to
correct phase sequence.
Motor rotor initial phase
detection is incorrect
due to interference at
power-on.
UVW phase sequence is correct. But Er.234
occurs once servo drive is enabled.
Re-power on the servo system.
3. Encoder type is set
incorrectly or wiring is
incorrect.
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.
Replace matching servo drive and
servo motor. If you use IS650P series
servo drive and 20-bit servo motor
(-U2***) of Inovance, ensure that H00-
00 = 14000. Re-confirm motor model,
encoder type and encoder wiring.
4. Encoder cable is
incorrectly wired,
corrosive, or connected
loosely.
Check whether encoder cable you use is
standard configuration of Inovance. check
whether cable is aging, corrosive or is
connected loosely.
Set the S-ON signal to OFF and rotate motor
shaft manually. Check whether H0B-10
(electric angle) changes as motor rotates.
Re-weld, fasten or replace encoder
cable.
5. When controlling a
vertical shaft, gravity
load is too large.
Check whether load of vertical shaft is too
large. Adjust brake parameters H02-09 to
H02-12 and then see whether the fault is
removed.
Reduce load of vertical shaft, improve
rigidity or shield this fault on the
prerequisite of not affecting safety and
use.
CAUTION
On working condition of controlling a vertical shaft or one motor dragging the other, set H0A-
12 = 0 to shield the runaway fault.
Er.400: Main circuit overvoltage
Cause
Confirming Methods
Corrective Action
1. Main circuit input
voltage is too high
Check power input specification of servo
drive. Measure RST input voltage on
servo drive side and check whether
input voltage complies with the following
specification.
220 V AC drive:
Valid value: 220 to 240 V
Allowed error: -10% to 10% (198 to 264
V)
380V AC drive:
Valid value: 380 to 480 V
Allowed error: -10% to 10% (342 to 528
V)
Replace power supply or adjust power voltage
according to specification on the left.
2. Power supply is
instable or affected
by the lightning
strike.
Check whether power supply is instable,
affected by lightning strike or satisfies
preceding specification.
Connect a surge suppressor and then connect
power supply. If the fault persists, replace the
servo drive.
Summary of Contents for IS650P Series
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