◆ n: Special Adjustment
The n parameters are used to adjust more advanced performance characteristics such as Hunting Prevention, speed
feedback detection, High Slip Braking, and Online Tuning for motor line-to-line resistance.
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n1: Hunting Prevention
L8-18
(4BEH)
Software Current Limit Selection
0: Disabled
1: Enabled
Default: 0
Min: 0
Max: 1
272
L8-19
(4BFH)
Frequency Reduction Rate during
Overheat Pre-Alarm
Specifies the frequency reference reduction gain at overheat pre-alarm when L8-03 = 4.
Default: 0.8
Min: 0.1
Max: 0.9
270
L8-27
(4DDH)
Overcurrent Detection Gain
Sets the gain for overcurrent detection as a percentage of the motor rated current. Overcurrent is
detected using the drive’s overcurrent level or the value set to L8-27, whichever is lower.
Default: 300.0%
Min: 0.0%
Max: 300.0%
272
L8-29
(4DFH)
Current Unbalance Detection
(LF2)
0: Disabled
1: Enabled
Default: 1
Min: 0
Max: 1
272
L8-35
(4ECH)
Installation Method Selection
0: IP00 enclosure drive
1: Side-by-Side mounting
2: NEMA Type 1 enclosure
3: Finless model drive or external heatsink installation
Default:
<3> <9>
Min: 0
Max: 3
273
L8-38
(4EFH)
Carrier Frequency Reduction
Selection
0: Disabled
1: Enabled below 6 Hz
2: Enabled for the entire speed range
Default:
<16>
Min: 0
Max: 2
273
L8-40
(4F1H)
Carrier Frequency Reduction
Off-Delay Time
Sets the time that the drive continues running with reduced carrier frequency after the carrier
reduction condition is gone. Setting 0.00 s disables the carrier frequency reduction time.
Default:
<10>
Min: 0.00 s
Max: 2.00 s
273
L8-41
(4F2H)
High Current Alarm Selection
0: Disabled
1: Enabled. An alarm is triggered at output currents above 150% of the drives rated current.
Default: 0
Min: 0
Max: 1
273
L8-55
(45FH)
Internal Braking Transistor
Protection
0: Disabled. L8-55 should be disabled when using a regen converter or an optional braking unit.
1: Protection enabled.
Default: 1
Min: 0
Max: 1
274
<3> Parameter setting value is not reset to the default value when the drive is initialized.
<9> Default setting is determined by the drive model (o2-04) and duty selection (C6-01).
<10> Default setting is determined by the control mode (A1-02).
<16> Default setting is determined by the control mode (A1-02) and the drive model (o2-04).
No. (Addr.) Name Description Setting Page
n1: Hunting Prevention
n1-01
(580H)
Hunting Prevention Selection
0: Disabled
1: Enabled
Default: 1
Min: 0
Max: 1
275
n1-02
(581H)
Hunting Prevention Gain Setting
If the motor vibrates while lightly loaded, increase the gain by 0.1 until vibration ceases. If the
motor stalls, decrease the gain by 0.1 until the stalling ceases.
Default: 1.00
Min: 0.00
Max: 2.50
275
n1-03
(582H)
Hunting Prevention Time Constant
Sets the time constant used for Hunting Prevention.
Default:
<6>
Min: 0 ms
Max: 500 ms
275
No. (Addr.) Name Description Setting Page
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