Omron Q2V Series User Manual

7.10 Troubleshooting Without Fault Display
262 SIEPCYEUOQ2V01A Q2V Technical Manual
◆ The Drive Frequency Reference Is Different than the Controller Frequency
Reference Command
Causes Possible Solutions
The analog input gain and bias for the frequency reference input are set
incorrectly.
Examine the gain and bias settings for the analog inputs that set the frequency reference.
• Terminal AI1: H3-03 [AI1 Gain Setting], H3-04 [AI1 Bias Setting]
• Terminal AI2: H3-11 [AI2 Gain Setting], H3-12 [AI2 Bias Setting]
The drive is receiving frequency bias signals from analog input terminals
AI1 and AI2 and the sum of all signals makes the frequency reference.
• Examine parameters H3-02, H3-10 [MFAI Function Select]. If both of these parameters = 4
[Freq Ref/BIAS], change the settings.
• Use U1-13, U1-14 [Terminal AI1 InputLv, Terminal AI2 InputLv] to make sure that the analog
input values set to terminals AI1 and AI2 are applicable.
PID control is enabled. If PID control is not necessary, set b5-01 = 0 [PID Enable = Disabled].
Note:
When PID control is enabled, the drive adjusts the output frequency as specified by the target
value. The drive will only accelerate to the maximum output frequency set in E1-04 [Max
Output Frequency] while PID control is active.
◆ The Motor Speed Is Not Stable When Using a PM Motor
Causes Possible Solutions
E5-01 [PM Mot Code Selection] is set incorrectly. Refer to “Motor Performance Fine-Tuning” in the technical manual.
The drive is operating the motor at more than the specified speed control
range.
Examine the speed control range and adjust the speed.
The motor is hunting. Adjust these parameters to have the largest effect:
• n8-55 [Load Inertia]
• n8-45 [SpdFbck Det.Gain]
• C4-02 [Trq Comp Delay Time]
Hunting occurs at start. Increase the value set in C2-01 [Jerk@Start of Accel].
Too much current is flowing through the drive. Set E5-01 [PM Mot Code Selection] correctly as specified by the motor. For special-purpose
motors, enter the correct value to E5-xx as specified by the motor test report.
Operation is not stable when n8-57 = 1 [High-Freq Injection = Enabled]. • Do High Frequency Injection Auto-Tuning.
• Decrease the value set in n8-41 [HFI PoleDet Pgain] in increments of 0.5.
Note:
Set n8-41 > 0.0 for IPM motors.
◆ There Is Too Much Motor Oscillation and the Rotation Is Irregular
Causes Possible Solutions
Unsatisfactory balance of motor phases. • Make sure that the drive input power voltage supplies stable power.
• Set L8-05 = 0 [In PhaseLoss Selection = Disabled].
The motor is hunting. • Set n1-01 = 1 [HuntPrev Selection = Enabled].
• Increase the value of n2-01 [AFR Gain] or n2-02 [AFR Time 1].
◆ Deceleration Takes Longer Than Expected When Dynamic Braking Is Enabled
Causes Possible Solutions
The stall prevention during deceleration setting is incorrect. • Examine the setting for L3-04 [StallP@Decel Enable].
• When the drive has a dynamic braking option installed, set L3-04 = 0 [Disabled].
• If the drive detects ov [Overvoltage], set L3-04 = 1 [Enabled] and L3-50 = 2 [StallP@Decel
Mode = Gen Purpose w/ DB Resistor].
The deceleration time setting is too long. Set C1-02, C1-04, C1-06, or C1-08 [Deceleration Times] to applicable values.
The motor torque is not sufficient. Use a larger motor.
Note:
If these items are correct, the demand on the motor is more than the motor capacity:
• Parameter settings are correct.
• The drive does not detect ov [Overvoltage].

Omron Q2V Series Specifications

General

Brand	Omron
Model	Q2V Series
Category	Inverter
Language	English