Omron Q2A Installations- Und Bedienungsanleitung Seite 20

1 English
Code Name
oL2 Drive Overload
20
Causes
The acceleration/deceleration times or cycle times
are too short.
Overload occurred while running at low speed.
L1-01 [Motor Cool Type for OL1 Calc] is set
incorrectly.
The V/f pattern does not fit the motor qualities.
E1-06 [Base Frequency] is set incorrectly.
One drive is operating more than one motor.
The electronic thermal protector qualities and the
motor overload properties do not match.
The electronic thermal protector is operating at an
incorrect level.
There is increased motor loss from overexcitation
operation.
The speed search-related parameters are set
incorrectly.
Phase loss in the input power supply is causing the
output current to change.
The load is too heavy.
The acceleration/deceleration times or cycle times
are too short.
The V/f pattern does not fit the motor qualities.
The drive capacity is too small.
Overload occurred while running at low speed.
The torque compensation gain is too large.
The speed search-related parameters are set
incorrectly.
Phase loss in the input power supply is causing the
output current to change.
TOMPYEUOQ2A03C AC Drive Q2A Installation and Operation Instructions
Possible Solutions
• Examine the acceleration/deceleration times and the motor
start/stop frequencies (cycle times).
• Increase the value set in Acceleration/Deceleration Times C1-
01 to C1-08.
• Lower 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.
Set L1-01 in as specified by the motor qualities for a drive-
dedicated motor.
• Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• Adjust V/f Pattern Parameters E1-04 to E1-10. For motor 2,
adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid
A Voltage] and E1-10 [Min Output Voltage].
Note:
If E1-08 and E1-10 are set too low, the overload tolerance will
decrease at low speeds.
Set E1-06 to the rated frequency shown on the motor nameplate.
Set L1-01 = 0 [Motor Cool Type for OL1 Calc = Disabled],
connect thermal overload relay to each motor to prevent damage
to the motor.
• Examine the motor qualities and set L1-01 [Motor Cool Type
for OL1 Calc] correctly.
• Connect a thermal overload relay to the motor.
Set E2-01 [Mot Rated Current (FLA)] to the value shown on the
motor nameplate.
• Lower the value set in n3-13 [OverExcBr Gain].
• Set L3-50 ≠ 3 or 4 [StallP@Decel Mode ≠ HiFlux
Overexcitation or HiFlux2 Overexcitation].
• Set L3-04 = 0 [StallP@Decel Enable = Disabled].
• Examine the settings for all speed search related parameters.
• Adjust b3-03 [SpSrch Deceleration Time].
• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
Make sure that there is no phase loss, and repair problems.
Decrease the load.
• Examine the acceleration/deceleration times and the motor
start/stop frequencies (cycle times).
• Increase the value set in Acceleration/Deceleration Times C1-
01 to C1-08.
• Examine the ratios between the V/f pattern frequency and
voltage. Lower the voltage if it is too high compared to the
frequency.
• Adjust V/f Pattern Parameters E1-04 to E1-10. Lower the
values set in E1-08 [Mid A Voltage] and E1-10 [Min Output
Voltage] For motor 2, adjust E3-04 to E3-10.
Note:
If E1-08 and E1-10 are set too low, the overload tolerance is
will decrease at low speeds.
Replace the drive with a larger capacity model.
• Decrease the load when running at low speed.
• Replace the drive with a larger capacity model.
• Decrease the value set in C6-02 [Carrier Frequency
Selection].
Decrease the value set in C4-01 [Trq Comp Gain] to make sure
that the motor does not stall.
• Examine the settings for all speed search related parameters.
• Adjust b3-03 [SpSrch Deceleration Time].
• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
• Correct any wiring errors in the main circuit drive input power.
• Make sure that there is no phase loss, and repair problems.