N: Special Adjustments; N1: Hunting Prevention - YASKAWA FSDrive-MV1000 Parameter Manual

1.3 Parameter Table
No.
Name
(Addr.)
Output Voltage
L8-66
Unbalance
(3115H)
Detection Level
Output Voltage
L8-67
Unbalance
(3116H)
Detection Time
Transformer
L8-86 Overheat Alarm
(3100H) (TMA) Operation
Selection
Transformer
L8-87
Overheat Alarm
(3101H)
(TMA) Level
Transformer
L8-88
Overheat Fault
(3102H)
(TME) Level
<3> Parameter setting value is not reset to the default value when the drive is initialized (A1-03 = 1110/2220).
<6> Default setting is determined by o2-04, Drive Model Selection.
<8> The setting range changes if the value of the motor rated capacity (E2-11) is changed by Auto-Tuning or manual setting.
<10> Default setting is determined by A1-02, Control Method Selection.
<12> The setting range for the acceleration and deceleration times is determined by the accel/decel time setting units in C1-10. For example, if the
accel/decel time setting units are set to 0.01 s (C1-10 = 0), the setting range becomes 0.00 to 600.00 s.
<16> Default setting is determined by A1-02, Control Method Selection, and o2-04, Drive Model Selection.
<20> The range upper limit is determined by E1-04, Maximum Output Frequency, and E1-04, Frequency Reference Upper Limit.
u n: Special Adjustment
The n parameters adjust more advanced performance characteristics such as Hunting Prevention and Speed Feedback
Detection Control.
No.
Name
(Addr.)
n1-01 Hunting Prevention
(580H) Selection
n1-02 Hunting Prevention
(581H) Gain Setting
n1-03 Hunting Prevention
(582H) Time Constant
Hunting Prevention
n1-05
Gain while in
(530H)
Reverse
70
All Modes
Sets the level at which unbalance of the output voltage is detected in 0.1%
units (100%: 2400 V for the 2.4 kV class and 4160 V for the 4.16 kV class).
All Modes
Sets the time before output voltage unbalance is detected in 0.001 s units. If
the state in which the zero-phase voltage detection value exceeds the level
set to L8-66 continues for the time set to L8-67 or longer, VUB (output
voltage unbalance) is detected.
All Modes
Sets the operation when a TMA (Transformer Overheat Alarm) is detected.
0: Ramp to stop over the time set for C1-02 (Deceleration Time)
1: Coast to stop
2: Fast Stop over the time set for C1-09 (Fast Stop Time)
3: Continue operation. TMA alarm is triggered.
All Modes
Sets the detection temperature for TMA alarm function in °C units.
Note: An alarm is detected when the detected transformer
temperature reaches the value set here.
All Modes
Sets the detection temperature for TME fault function in °C units.

n1: Hunting Prevention

V/f OLV
0: Disabled
1: Enabled
V/f OLV
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 OLV
Sets the time constant used for Hunting Prevention.
V/f
OLV
Sets the gain used for Hunting Prevention. If set to 0, the gain set to n1-02 is
used for operation in reverse.
Description
Description
CLV
CLV
CLV
CLV
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Setting
Default: 10.0%
common_
Min: 0.0%
Max: 100.0%
common_
Default: 0.200 s
Min: 0.001 s
Max: 2.000 s
common_
Default: 3
Min: 0
Max: 3
common_
Default:
<6>
Min: 50°C
Max: 160°C
Default:
<6>
common_
Min: 50°C
Max: 160°C
Setting
Default: 1
common
Min: 0
Max: 1
Default: 1.00
common
Min: 0.00
Max: 2.50
Default:
<6>
Min: 0 ms
common
Max: 500 ms
Default: 0.00
common
Min: 0.00
Max: 2.50
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