YASKAWA LA700 Series, Инструкция по установке и эксплуатации, Страница: 36 / 378

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36 YASKAWA TOMPYEULA7002A LA700 Series Installation and Operation Instruction
Code Name Causes Possible Solutions
The acceleration ramp is too fast. • Calculate the torque necessary during acceleration related to
the load inertia and the specified acceleration ramp.
• Increase the values set in C1-01, C1-03, C1-05, or C1-07
[Acceleration Ramps] to get the necessary torque.
• Increase the values set in C2-01 to C2-04 [Jerk
Characteristics] to get the necessary torque.
• Replace the drive with a larger capacity model.
The drive is trying to operate a specialized motor or
a motor that is larger than the maximum applicable
motor output of the drive.
•
Examine the motor nameplate, the motor, and the drive to
make sure that the continuous rated output current is larger
than the motor rated current.
•
Replace the drive with a larger capacity model.
The V/f pattern settings are incorrect. • Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• Adjust E1-04 to E1-10 [V/f Pattern Parameters] . For motor 2,
adjust E3-04 to E3-10 .
The torque compensation gain is too large. Decrease the value set in C4-01 [Torque Compensation Gain] to
make sure that the motor does not stall.
The drive received an Up/Down command while
the motor was coasting. Examine the sequence and input the Up/Down command after the
motor fully stops.
oL1 Motor Overload
The load is too heavy. Decrease the load.
Note:
Reset oL1 when U4-16 [Motor oL1 Level] < 100.
Overload occurred while running at low speed. • Decrease the load when running at low speed.
•
Increase the motor speed.
• If the motor is run frequently at low speeds, replace the motor
with a larger motor or use a drive-dedicated motor.
Note:
For general-purpose motors, overload can occur while
running at low speed when operating at below the rated
current.
L1-01 [Motor Overload (oL1) Protection] is set
incorrectly.
Set L1-01 as specified by the motor qualities for a drive-dedicated
motor.
The V/f pattern does not fit the motor qualities. • Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• Adjust E1-04 to E1-10 [V/f Pattern Parameters] . For motor 2,
adjust E3-04 to E3-10 . Decrease the values set in E1-08 [Mid
Point A Voltage] and E1-10 [Minimum Output Voltage] .
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
One drive is operating more than one motor. Set L1-01 = 0 [Motor Overload (oL1) Protection = Disabled] ,
connect thermal overload relay to each motor to prevent damage
to the motor.
The electronic thermal protector is operating at an
incorrect level. Set E2-01 [Motor Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
oL2 Drive Overload The load is too large. Decrease the load.
The acceleration/deceleration ramps or cycle times
are too fast. • Examine the acceleration/deceleration ramps and the motor
start/stop frequencies (cycle times).
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Ramps] .
The drive capacity is too small. Replace the drive with a larger capacity model.
Overload occurred while running at low speed.
•
Decrease the load when running at low speed.
•
Replace the drive with a larger capacity model.
ov Overvoltage The deceleration ramp is too fast and too much
regenerative energy is flowing back into the drive.
•
Increase the values set in C1-02, C1-04, C1-06, or C1-08
[Deceleration Ramps] .
• Connect a dynamic braking option to the drive.
The acceleration ramp is too fast. • Make sure that sudden drive acceleration does not cause the
fault.
• Increase the values set in C1-01, C1-03, C1-05, or C1-07
[Acceleration Ramps] .
•
Increase the value set in C2-02 [Jerk Time @ End of Accel] .
The braking load is too large. Connect a dynamic braking option to the drive.
There are surge voltages in the input power supply. Connect a DC reactor to the drive.
Note:
If you turn the phase advancing capacitors ON and OFF and
use thyristor converters in the same power supply system,
there can be surge voltages that irregularly increase the input
voltage.
The power supply voltage is too high. Decrease the power supply voltage to match the drive rated
voltage.