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L7-06: Torque Limit Integral Time Constant
Sets the integral time constant for the torque limit function. Decrease the setting for faster torque limit response. Increase the
setting if oscillation occurs when operating at the torque limit.
No. Name Setting Range Default
L7-06 Torque Limit Integral Time Constant 5 to 10000 ms 200 ms
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L7-07: Torque Limit Control Method Selection during Accel/Decel
Selects the function of torque limit during acceleration and deceleration.
No. Name Setting Range Default
L7-07 Torque Limit Control Method Selection during Accel/Decel 0, 1 0
Setting 0: Proportional Control
The torque limit function works with P control during accel and decel, and switches to I control at constant speed. Use this
setting when accelerating or decelerating to the desired speed has priority over the torque limit during speed changes.
Setting 1: Integral Control
The torque limit function always uses I control. Use this setting when a highly accurate torque limit is required, even during
speed changes. Using this function may increase the acceleration time, or prevent the motor speed from reaching the frequency
reference if the torque limit is reached first.
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L7-16: Torque Limit Process at Start
Assigns a time filter to allow the torque limit to build at start.
No. Name Setting Range Default
L7-16 Torque Limit Process at Start 0, 1 1
Setting 0: Disabled
Torque limit is created at start without a delay time. Disable L7-16 to maximize the response time when the application requires
sudden acceleration or deceleration at start.
Setting 1: Enabled
A delay time of 64 ms is added to allow the torque limit to build at start.
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L7-30: Regenerative Torque Limit Mode Selection
Defines the behavior of the regenerative torque limits.
No. Name Setting Range Default
L7-30 Regenerative Torque Limit Mode Selection 0, 1 0
Setting 0: Standard mode
Torque Limit is affected by all analog and communication Torque Limit settings.
Setting 1: Independent mode
Only L7-03, L7-04 and Regen Torque Limit analog input setting affect the regenerative quadrants.
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L8: Drive Protection
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L8-02: Overheat Alarm Level
Sets the overheat alarm (oH) detection level.
The drive outputs an alarm when the heatsink temperature exceeds the overheat alarm level. If the temperature reaches the
overheat fault level, the drive will trigger an oH1 fault and stop operation.
When an output terminal is set for the oH pre-alarm (H2-oo = 20), the switch will close when the heatsink temperature rises
above L8-02.
No. Name Setting Range Default
L8-02 Overheat Alarm Level 50 to 150 °C
Determined by
C6-01 and o2-04
1.8 L: Protection Functions
152
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
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