B.3 Parameter Table
350 YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
◆ n: Advanced Performance Set-Up
The n parameters are used to adjust more advanced performance characteristics such as hunting prevention and speed
feedback detection.
L8-54
<38>
STo Bias Detection
Selection
Enables and disables a deviation detection of STo
detection. This setting is rarely needs to be changed.
Setting 0: No deviation detection
Setting 1: Deviation detection is enabled
0,1 1 −−A 474 205
<1> Default setting is determine by the control mode set in parameter A1-02. The value shown is for OLV (A1-02 = 2).
<2> Default setting is determine by the control mode set in parameter A1-02. The value shown is for A1-02 = 0-V/f Control.
<6> The upper limit of the setting range is determined by the values set to C6-01 and L8-38.
<8> Default setting value is dependent on parameter E1-01, Input Voltage Setting.
<11> Default setting is determined by the drive model selection set in parameter o2-04.
<15> Parameter can be changed during run.
<17> Values shown here are for 200 V class drives. Double the value when using a 400 V class drive.
<18> Parameter setting value is not reset to the default value during drive initialization, A1-03 = 1110, 2220, 3330.
<21> Setting value 2 is not available A1-02 = 5-PM OLV Control. When enabled, the drive stops accelerating when it exceeds the value of L3-02,
Stall Prevention Level. The drive decelerates after 100 ms and begins accelerating again after restoring the current level.
<27> The setting range depends on the control mode set in A1-02. For PM OLV Control the setting range is 0 to 2.
<33> Default setting is determined by the drive model selection set in parameter o2-04 and C6-01, Drive Duty Selection.
<38> This parameter is valid from software version 6002 or later. This setting rarely needs to be changed from its default value.
No. Name Description Range Def.
Control
Mode
Addr.
Hex
Pg.
V/f
OL
V
P
M
n1: Hunting Prevention
Use n1 parameters to configure hunting prevention operation.
n1-01
Hunting Prevention
Selection
If the motor vibrates while lightly loaded, Hunting
Prevention may reduce the vibration.
0: Disabled
1: Enabled
When quick response is needed disable Hunting
Prevention.
0,1 1 A −− 580 206
n1-02
<15>
Hunting Prevention Gain
Setting
Sets the gain for the Hunting Prevention Function.
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.
0.00 to
2.50
1.00 A −− 581 206
n1-03
<15>
Hunting Prevention Time
Constant
Sets the time constant used for hunting prevention. 0 to 500
<11> A −− 582 206
n1-05
<15>
Hunting Prevention Gain
while in Reverse
Sets the gain used for Hunting Prevention.
When set to 0, the gain n1-02 is used for operation in
reverse direction.
0.00 to
2.50
0.00 A −− 530 206
n2: Speed Feedback Detection Control (AFR) Tuning
Use n2 parameters to configure the Speed Feedback Detection Control function operation.
n2-01
<15>
Speed Feedback Detection
Control (AFR) Gain
Sets the internal speed feedback detection control gain in
the automatic frequency regulator (AFR).
This parameter does not typically require adjustment.
Adjust this parameter as follows:
If hunting occurs, increase the set value.
If response is low, decrease the set value.
0.00 to
10.00
<11> − A − 584 206
Adjust the setting by 0.05 units at a time,
while checking the response.
n2-02
<15>
Speed Feedback Detection
Control (AFR) Time
Constant 1
Sets the AFR time constant 1. 0 to 2000 50 ms − A − 585 207
n2-03
<15>
Speed Feedback Detection
Control (AFR) Time
Constant 2
Sets the AFR time constant 2. Increase the setting if
overvoltage occurs during sudden load changes or the
speed overshoots during fast acceleration.
0 to 2000
750
ms
− A − 586 207
No. Name Description Range Def.
Control
Mode
Addr.
Hex
Pg.
V/f
OL
V
P
M
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