YASKAWA FSDrive-MV1000 - Page 217

2.8 L: Protection Functions
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 217
n L7-06: Torque Limit Integral Time Constant
Sets the integral time constant for the torque limit function. Decrease this setting to increase frequency fluctuation due to
torque limit while applying integral control.
n
L7-07: Torque Limit Control Method Selection during Accel/Decel
Selects the function of torque limit during acceleration and deceleration.
Setting 0: Proportional control (changes to integral control at constant speed)
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 may prevent the motor speed from
reaching the frequency reference if the torque limit is reached first.
n
L7-16: Torque Limit Process at Start
Assigns a time filter to allow the torque limit to build at start.
Setting 0: Disabled
Toque limit is created at start without a delay time. Disable L7-16 to maximize response time when the application
requires sudden acceleration or deceleration at start.
Setting 1: Enabled
A time filter is added to allow the torque limit to build at start.
n
L7-30: Regenerative Torque Limit Mode Selection
Parameter L7-30 sets the mode for the regenerative torque limit.
Setting 0: Standard mode (torque limits from all analog and communications inputs effective)
Setting 1: Independent mode (only L7-03, -04 and H3- (regenerative torque limit) effective)
n L7-32: Low Speed Regenerative Torque Limit Mode Selection
Sets the mode for the regenerative torque limit when the motor speed is 10% or less.
Setting 0: Follows the torque limit value.
Setting 1: Lowers the lower limits for the regenerative torque limit when the motor speed is 10% or less.
Note: This parameter is available from the drive software version S0104 and later.
No. Name Setting Range Default
L7-06 Torque Limit Integral Time Constant 5 to 10000 ms 200 ms
No. Name Setting Range Default
L7-07
Torque Limit Control Method Selection during Accel/
Decel
0, 1 0
No. Name Setting Range Default
L7-16 Torque Limit Process at Start 0, 1 1
No. Name Setting Range Default
L7-30 Regenerative Torque Limit Mode Selection 0, 1 0
No. Name Setting Range Default
L7-32
Low Speed Regenerative Torque Limit Mode
Selection
0, 1 1
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