1.8 L: Protection Functions
216 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
◆ L7: Torque Limit
The torque limit function can be used to limit the torque in each of the four quadrants
individually and thereby protect the machinery. It can be used in the Open Loop Vector
Control mode. A digital output programmed for “During Torque Limit” (H2-01/02/03 = 30)
can be switched when the drive is operating at the torque limit.
■ L7-01/02/03/04: Torque Limits
These parameters set the torque limits in each operation mode.
Note: If the multi-function analog input is programmed for “10: Positive Torque Limit”, “11: Negative
Torque Limit”, “12: Regenerative Torque Limit”, or “15: General Torque Limit”, the drive uses
the lower value of either L7-01 through L7-04, or analog input torque limit. Refer to Setting 10/
11/12/15: Positive / Negative / Regenerative / General Torque Limit (OLV only) on page 179
for details on using analog torque limits.
■ L7-06: Torque Limit Integral Time Constant
Sets the integral time constant for the torque limit function.
■ L7-07: Torque Limit Control Method Selection during Accel/Decel
Selects how torque limit operates during acceleration and deceleration.
Setting 0: Proportional Control
The torque limit function works with P-control during acceleration and deceleration and
switches to I-control at constant speed. Use this setting when acceleration or deceleration to
the desired speed has priority over torque limitation during speed changes.
No. Name Setting Range Default
L7-01 Forward Torque Limit 0 to 300% 200%
L7-02 Reverse Torque Limit 0 to 300% 200%
L7-03 Forward Regenerative Torque Limit 0 to 300% 200%
L7-04 Reverse Regenerative Torque Limit 0 to 300% 200%
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
Acceleration / Deceleration
0 or 1 0
To Next Page
Loading...
