n
n8-45: Speed Feedback Detection Control Gain (for PM OLV)
Sets the gain for internal speed feedback detection control. Although this setting rarely needs to be changed, adjustment
may be necessary under the following conditions:
• Increase this setting if motor oscillation or hunting occurs.
• Decrease this setting in increments of 0.05 to decrease the drive responsiveness.
No. Name Setting Range Default
n8-45 Speed Feedback Detection Control Gain 0.00 to 10.00 0.80
n
n8-47: Pull-In Current Compensation Time Constant (for PM OLV)
Sets the time constant for making the actual current and the pull-in current agree.
Although this setting rarely needs to be changed, adjustment may be necessary under the following conditions:
• Increase this setting when it takes too long for the reference value for the pull-in current to match the target value.
• Decrease this setting if motor oscillation occurs.
No. Name Setting Range Default
n8-47 Pull-In Current Compensation Time Constant 0.0 to 100.0 s 5.0 s
n
n8-48: Pull-In Current (for PM OLV)
Tells the drive the amount of d-axis current to be provided to the motor during no-load operation at a constant speed. Set
as a percentage of the motor rated current.
• Increase this setting when hunting occurs or the motor speed is unstable while running at a constant speed.
• If there is too much current when driving a light load at a constant speed, then reduce this level slightly.
No. Name Setting Range Default
n8-48 Pull-In Current 20 to 200%
Determined by
E5-01
n
n8-49: d Axis Current for High Efficiency Control (for PM OLV)
Sets the amount of d axis current when using Energy Saving control as a percentage of the motor rated current.
Although this setting seldom needs to be changed, please note the following:
• If motor operation is unstable when driving heavy loads, try increasing this setting (towards 0).
• If motor parameters (E5) have been changed, this value will be reset to 0 and has to be readjusted.
No. Name Setting Range Default
n8-49 d Axis Current for High Efficiency Control -200.0 to 0.0%
Determined by
E5-01
n
n8-51: Acceleration Time Pull-In Current (for PM OLV)
Sets the d-axis current during acceleration as a percentage of the motor rated current (E5-03).
Adjustments to this setting may help in the following situations:
• Increase this setting when a large amount of starting torque is required.
• Lower this setting if there is excessive current during acceleration.
No. Name Setting Range Default
n8-51 Acceleration Time Pull-In Current 0 to 200%
Determined by
E5-01
n
n8-54: Voltage Error Compensation Time Constant (for PM OLV)
Sets the time constant for voltage error compensation. Make changes to this parameter under the following conditions:
• Adjust the value when hunting occurs at low speed.
• Increase the value in steps of 0.1 when hunting occurs with sudden load changes. Try to disable the compensation by
setting n8-51 = 0 if increasing does not help.
• Increase the value when oscillations occur at start.
No. Name Setting Range Default
n8-54 Voltage Error Compensation Time Constant 0.00 to 10.00 1.00
n
n8-55: Load Inertia (for PM OLV)
Sets the ratio between motor inertia and the inertia of the connected machinery. If this value is set too low, the motor may
not start very smoothly, and a STo fault (Motor Step-Out) might occur.
5.9
n: Special Adjustments
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
211
5
Parameter Details
7/16/2008-13:23
To Next Page
Loading...
Need help?
General
