L7: Torque Limit - YASKAWA L1000A Technical Manual

5.8 L: Protection Functions
L6-02, L6-05: Torque Detection Level 1, 2
■
These parameters set the detection levels for the torque detection functions 1 and 2. In V/f control mode, these levels are
set as a percentage of the drive rated output current, while in vector control modes these levels are set as a percentage of
the motor rated torque.
No.
L6-02
L6-05
L6-03, L6-06: Torque Detection Time 1, 2
■
These parameters determine the time required to trigger an alarm or fault after exceeding the levels in L6-02 and L6-05.
No.
L6-03
L6-06

◆ 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
elevator. It can be used in OLV, CLV, and CLV/PM control modes. The limit can be set by parameters. A digital output
programmed for "During torque limit" (H2-01 through H2-05 = 30) will be switched when the drive is operating at the
torque limit.
■ Setting Torque Limits
The torque limits are defined by parameters L7-01 to L7-04 for each of the four operation quadrants.
which of the limit settings is applied in each quadrant.
Note: The maximum output torque is ultimately limited by the drive output current. Output torque will not exceed the limit set for the
drive rated current, even if the torque limits are set to higher values.
Figure 5.42
REV motor rotation
L7-01 to L7-04: Torque Limits
■
These parameters set the torque limits in each operation mode.
A setting of 100% is equal to the motor rated torque.
No.
L7-01
L7-02
L7-03
L7-04
234
Parameter Name
Torque Detection Level 1
Torque Detection Level 2
Parameter Name
Torque Detection Time 1
Torque Detection Time 2
positive torque reference
REV run regenerative
Parameter L7-04
quadrant 2
quadrant 3
Parameter L7-02
REV run motoring
negative torque reference
Figure 5.42 Torque Limit Parameters
Parameter Name
Forward Torque Limit
Reverse Torque Limit
Forward Regenerative Torque Limit
Reverse Regenerative Torque Limit
quadrant 1
quadrant 4
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Setting Range
0 to 300%
0 to 300%
Setting Range
0.0 to 10.0 s
0.0 to 10.0 s
FWD run motoring
Parameter L7-01
FWD motor rotation
Parameter L7-03
FWD run regenerative
common_TMonly
Setting Range
0 to 300%
0 to 300%
0 to 300%
0 to 300%
Default
150%
150%
Default
0.1 s
0.1 s
Figure 5.42 shows
Default
200%
200%
200%
200%