Omron RX Series User Manual page 593

Symptom
An Overvoltage protection
alarm (E07) occurs during
deceleration.
A Thermistor error (E35)
occurs.
The output frequency is
unstable.
The output torque is
insufficient.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Possible cause
The set deceleration time is
too short.
The Overvoltage Suppression
Function Selection During
Deceleration (b130) is set to
00 (Disabled).
If the Overvoltage protection alarm (E07) still occurs during deceleration when the Overvoltage
Suppression Function Selection During Deceleration (b130) is set to 01 or 02 (Enabled), refer
to the following information.
The Overvoltage Suppression
Proportional Gain During
Deceleration
(b133)/Overvoltage
Suppression Integral Time
During Deceleration (b134)
value is inappropriate.
The Overvoltage Suppression
Level During Deceleration
(b131) is too high.
24-VDC voltage is input to the
external thermistor input
terminal TH.
The parameter settings are
inappropriate.
The load changes
significantly.
The power supply voltage
fluctuates.
The acceleration/constant
speed parameter settings are
inappropriate.
The 1st/2nd/3rd Deceleration
Time 1 (F003/F203/F303)/
1st/2nd/3rd Deceleration
Time 2 (A093/A293/A393)
settings are inappropriate.
Remedy
Increase the value set in the 1st/2nd/3rd
Deceleration Time 1/2
(F003/F203/F303/A093/A293/A393).
Set the Overvoltage Suppression Function
Selection During Deceleration (b130) to 01 or 02 to
enable the overvoltage suppression function.
However, when this function is enabled, the actual
deceleration time may be longer than the set value.
For details, refer to Overvoltage Suppression
Function during Deceleration on page 7-106.
Change the set values. For details, refer to
Overvoltage Suppression Function during
Deceleration on page 7-106.
Decrease the Overvoltage Suppression Level
During Deceleration (b131). Note, however, that
setting an excessively small value may disable
deceleration. Consider that the minimum value is:
Incoming voltage x √2 x 110%.
Deallocate the external thermistor function from the
terminal TH.
Change the output frequency value slightly away
from the power supply frequency.
Change the 1st/2nd/3rd Stabilization Parameter
(H006/H206/H306) value.
Increase the motor/inverter capacity.
Take measure to reduce the fluctuation.
Increase the 1st/2nd/3rd Manual Torque Boost
Voltage (A042/A242/A342)/1st/2nd/3rd Manual
Torque Boost Frequency (A043/A243/A343) value.
Set the 1st/2nd Torque Boost Selection
(A041/A241) to 01 (Automatic torque boost).
Decrease the Carrier Frequency (b083).
Set the 1st/2nd Control Method (A044/A244) to 03
(SLV: Sensorless vector control).
Increase the value set in the 1st/2nd/3rd
Deceleration Time 1/2
(F003/F203/F303/A093/A293/A393).
Set the AVR Selection (A081) to 01 or 02 (OFF).
Use braking resistors or regenerative braking units.
3 Troubleshooting
Reference
page
7-15
7-106
7-106
2-16
7-14
7-146
–
7-31
7-94
7-34
7-15
7-51
2-39
10 - 19
10