Omron Q2V Series Technical Manual page 244

7.5 Minor Faults/Alarms
Code Name
Note:
• The drive detects this fault if the motor overheat signal input from analog input terminal AI1 or AI2 is more than the fault detection level.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 4 [MFDO Function Select = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in L1-03 [Motor oH AL Reaction Select].
Code Name
oL3 Overtorque 1
Note:
• The drive detects this fault if the drive output current is more than the level set in L6-02 for longer than L6-03.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 4 [MFDO Function Select = Alarm] will activate.
• Set the conditions that trigger the minor fault using L6-01 [Trq Det1 Select].
Code Name
oL4 Overtorque 2
Note:
• The drive detects this error if the drive output current is more than the level set in L6-05 for longer than L6-06.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 4 [MFDO Function Select = Alarm] will activate.
• Set the conditions that trigger the minor fault using L6-04 [Trq Det2 Select].
Code Name
oL5 Mechanical Weakening Detection 1
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 4 [MFDO Function Select = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-08.
Code Name
oS Overspeed
Note:
• The drive detects this error if the motor speed is more than the value set in F1-08 for longer than F1-09.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 4 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-03 [Overspeed Detection Selection].
Code Name
ov Overvoltage
244
Causes
The motor has overheated.
Causes
A fault occurred on the machine.
Example: The machine is locked.
The parameters are incorrect for the load.
Causes
A fault occurred on the machine.
Example: The machine is locked.
The parameters are incorrect for the load.
Causes
The drive detected overtorque as specified by the
conditions for mechanical weakening detection set
in L6-08 [MechF Enable].
Causes
There is overshoot.
There is an incorrect number of PG pulses set in the
drive.
The oS detection level is set incorrectly.
Causes
There are surge voltages in the input power supply.
The drive output cable or motor is shorted to ground
(the current short to ground is charging the main
circuit capacitor of the drive through the power
supply).
The power supply voltage is too high.
Possible Solutions
• Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).
• Decrease the load.
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Times].
• Set E2-01 [Mot Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
• Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.
• 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
A Voltage] and E1-10 [Min Output Voltage].
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
Possible Solutions
Examine the machine and remove the cause of the fault
Adjust L6-02 [Trq Det1 Level] and L6-03 [Trq Det1 Time].
Possible Solutions
Examine the machine and remove the cause of the fault
Adjust L6-05 [Trq Det2 Level] and L6-06 [Trq Det2 Time].
Possible Solutions
Do a deterioration diagnostic test on the machine side.
Possible Solutions
• Decrease C5-01 [ASR PGain 1] and increase C5-02 [ASR
ITime 1].
• Adjust the pulse train gain with H6-02 to H6-05 [Pulse Train
Input Setting Parameters].
Set H6-02 [PI Frequency Scale] to the pulse train frequency
during 100% reference (maximum motor rotation speed).
Adjust F1-08 [Overspeed Level] and F1-09 [Overspeed Delay
Time].
Possible Solutions
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.
1. Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2. Re-energize the drive.
Decrease the power supply voltage to match the drive rated
voltage.
SIEPCYEUOQ2V01A Q2V Technical Manual