Omron RX - 2, Руководство пользователя

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12 Troubleshooting
12 - 10 High-function General-purpose Inverter RX2 Series User’s Manual
Too high P-N voltage results in a failure. To prevent this, the inverter turns OFF its output. When P-N
voltage exceeds approx. 410 Vdc (200 V class) or approx. 820 Vdc (400 V class), the output is turned
OFF. By setting the parameter, you can perform retries for a fixed number of times without generating
an error.
If the built-in memory has problems, the inverter turns OFF its output. CPU error may be issued instead.
The inverter recovers by re-turning ON the power; however, you need to check that there is no problem
in parameters. The data which has been backed up on the operator keypad beforehand may be
restored.
E007 Overvoltage Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred
during deceleration.
• Insufficient decelera-
tion time
• Load inertia is large.
Setting longer deceleration time in [FA-12] may improve the
situation that the motor is rapidly decelerated. If deceleration
time cannot be shortened, you need to re-examine load condi-
tion, activate overvoltage suppression function, or use a brak-
ing resistor, braking unit, or regenerative converter.
Error occurred
during operation.
Load inertia is large.
If load inertia is large, high regenerative power returns from
the motor; hence an overvoltage is likely to occur. You need to
re-examine load condition, activate overvoltage suppression
function, or use a braking resistor, braking unit, or regenerative
converter.
Rotated by external force
(fan, crane).
An overvoltage is likely to occur if motor rotation speed
exceeds the output frequency (rotation speed) of inverter. You
need to re-examine load condition, activate overvoltage sup-
pression function, or use a braking resistor, braking unit, or
regenerative converter.
Error occurred
during stop. Abnormality of PS volt-
age
Power supply voltage may be raised or fluctuated. Re-exam-
ination of power supply environment or use of an AC reactor
may improve the situation.
Error occurred
during drooping con-
trol
Mutual interference
caused by 2 inverters
trying to control motors
strictly.
When 2 motors driving a same shaft are controlled by 2 invert-
ers, both the inverters attempt to generate torques, which may
result in control divergence. The situation may be improved by
setting one of the inverters to P control. See
7-3-3 P/PI Switch-
ing Function on page 7-46.
E008 Memory Error
Occurrence Estimated cause(s) Exemplar measures to be taken
Error occurred some
time after the power
was turned ON.
Noise is mixed.
A physical countermeasure such as placing a shielding plate
may be required to avoid external noises.
Power has been
unintentionally
turned OFF before.
Power-off during mem-
ory access
You need to restore the data by using the data which has been
backed up on the operator keypad beforehand. If the data can-
not be restored, initialization is required. See
6-1-2 Inverter Ini-
tialization on page 6-5.
If the data cannot be restored by initialization, a repair is
required.