5.9 n: Special Adjustments
The n parameters handle a variety of specialized adjustments and functions, including Hunting Prevention, AFR Control,
High Slip Braking, resistance between motor lines, and PM motor control functions.
u
n1: Hunting Prevention
Hunting Prevention keeps the drive from hunting as a result of low inertia and operating with light load. It is available in
V/f Control only.
n
n1-01: Hunting Prevention Selection
Enables or disables the Hunting Prevention function.
Note: This function is available only when using V/f Control. Hunting Prevention should be disabled when drive response is need over suppressing
motor oscillation. This function can also be disabled without any problems in applications with high inertia loads or relatively heavy loads.
No. Name Setting Range Default
n1-01 Hunting Prevention Selection 0 or 1 1
Setting 0: Disabled
Setting 1: Enabled
n
n1-02: Hunting Prevention Gain Setting
Sets the gain for the Hunting Prevention Function.
No. Name Setting Range Default
n1-02 Hunting Prevention Gain Setting 0.00 to 2.50 1.00
Normally, n1-02 does not need to be changed, but adjustment may help under the following conditions:
• If the motor vibrates while lightly loaded and n1-01 = 1, increase the gain by 0.1 until vibration ceases.
• If the motor stalls while n1-01 = 1, decrease the gain by 0.1 until the stalling ceases.
n
n1-03: Hunting Prevention Time Constant
Determines how responsive the Hunting Prevention function is (affects the primary delay time for Hunting Prevention).
No. Name Setting Range Default
n1-03 Hunting Prevention Time Constant 0 to 500 ms
Determined by
o2-04
n
n1-05: Hunting Prevention Gain while in Reverse
This parameter is the same as n1-02, except that it is used when the motor rotates in reverse. See the setting instructions
for n1-02.
Note: When set to 0 ms, n1-02 is enabled even when the drive is operating in reverse.
No. Name Setting Range Default
n1-05 Hunting Prevention Gain while in Reverse 0.00 to 2.50 0.00
u
n2: Automatic Frequency Regulator (AFR) Tuning
These parameters are used to achieve speed stability when a load is suddenly applied or removed by calculating changes
in the torque current feedback and then compensating the output frequency.
Note: Before making changes to the AFR parameters, make sure the motor parameters are set properly or perform Auto-Tuning.
n
n2-01: AFR Gain
Sets the internal speed feedback detection control gain in the AFR.
No. Name Setting Range Default
n2-01 AFR Gain 0.00 to 10.00
Depending on drive
size
Normally there is no need to adjust n2-01 from the default setting. Make adjustments in the following cases:
• If hunting occurs, increase the set value in steps of 0.05 while checking the response.
• If response is low, decrease the set value in steps of 0.05 while checking the response.
5.9
n: Special Adjustments
208
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23
To Next Page
Loading...
Need help?
General
