N: Special Adjustment - YASKAWA A1000 Series Technical Manual

No. (Addr.) Name
L8-18
Software Current Limit Selection
(4BEH)
L8-19 Frequency Reduction Rate during
(4BFH) Overheat Pre-Alarm
L8-27
Overcurrent Detection Gain
(4DDH)
L8-29 Current Unbalance Detection
(4DFH) (LF2)
L8-35
Installation Method Selection
(4ECH)
L8-38 Carrier Frequency Reduction
(4EFH) Selection
L8-40 Carrier Frequency Reduction
(4F1H) Off-Delay Time
L8-41
High Current Alarm Selection
(4F2H)
L8-55 Internal Braking Transistor
(45FH) Protection
<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).

◆ 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.
n1: Hunting Prevention
■
No. (Addr.) Name
n1-01
Hunting Prevention Selection
(580H)
n1-02
Hunting Prevention Gain Setting
(581H)
n1-03
Hunting Prevention Time Constant
(582H)
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
All Modes
Specifies the frequency reference reduction gain at overheat pre-alarm when L8-03 = 4.
V/f V/f w/PG
OLV/PM AOLV/PM
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.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
All Modes
0: IP00 enclosure drive
1: Side-by-Side mounting
2: NEMA Type 1 enclosure
3: Finless model drive or external heatsink installation
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled below 6 Hz
2: Enabled for the entire speed range
V/f V/f w/PG
OLV/PM AOLV/PM
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.
All Modes
0: Disabled
1: Enabled. An alarm is triggered at output currents above 150% of the drives rated current.
All Modes
0: Disabled. L8-55 should be disabled when using a regen converter or an optional braking unit.
1: Protection enabled.
n1: Hunting Prevention
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
V/f V/f w/PG
OLV/PM AOLV/PM
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.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the time constant used for Hunting Prevention.
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
B.3 Parameter Table
Setting Page
common_
Default: 0
TMonly
Min: 0 272
Max: 1
Default: 0.8
common_
TMonly
Min: 0.1 270
Max: 0.9
common_
Default: 300.0%
TMonly
Min: 0.0% 272
Max: 300.0%
common_
Default: 1
TMonly
Min: 0 272
Max: 1
common_
TMonly
Default:
<3> <9>
Min: 0 273
Max: 3
common_
TMonly Default:
<16>
Min: 0 273
Max: 2
common_
Default:
<10>
TMonly
Min: 0.00 s 273
Max: 2.00 s
common_
Default: 0
TMonly
Min: 0 273
Max: 1
common_
Default: 1
TMonly
Min: 0 274
Max: 1
Setting Page
common_
Default: 1
TMonly
Min: 0 275
Max: 1
common_
Default: 1.00
TMonly
Min: 0.00 275
Max: 2.50
Default:
<6>
common_
TMonly Min: 0 ms 275
Max: 500 ms
B
439