5.8 L: Protection Functions
Setting 3: oL3, oL4 at speed agree (Fault)
Overtorque detection is active only when the output speed is equal to the speed reference, i.e., no detection during
acceleration and deceleration. The operation is stopped and an oL3 or oL4 fault is triggered.
Setting 4: oL3, oL4 at run (Fault)
Overtorque detection works as long as a Up/Down command is active. Operation stops and an oL3 or oL4 fault is
triggered.
Setting 5: UL3, UL4 at speed agree (Alarm)
Undertorque detection is active only when the output speed is equal to the speed reference, i.e., no detection during
acceleration and deceleration. The operation continues after detection and an oL3 or oL4 alarm is triggered.
Setting 6: UL3, UL4 at run (Alarm)
Undertorque detection works as long as the Up/Down command is active. The operation continues after detection and an
oL3 or oL4 alarm is triggered.
Setting 7: UL3, UL4 at speed agree (Fault)
Undertorque detection is active only when the output speed is equal to the speed reference, i.e., no detection during
acceleration and deceleration. The operation is stopped and an oL3 or oL4 fault is triggered.
Setting 8: UL3, UL4 at run (Fault)
Undertorque detection works as long as a Up/Down command is active. Operation stops and an oL3 or oL4 fault is
triggered.
■ 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.
Name
Setting Range
Default
L6-02
Torque Detection L evel 1
0 to 300%
150%
L6-05
Torque Detection L evel 2
0 to 300%
150%
■ 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.
Name
Setting Range
Default
L6-03
Torque Detection Time 1
0.0 to 10.0 s
0.1 s
L6-06
Torque Detection Time 2
0.0 to 10.0 s
0.1 s
♦ L7: Torque Limit
The torque limit function can be used to limit the torque in each o f 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
a
torque limit.
■ Setting Torque Limits
The torque limits are defined by parameters L7-01 to L7-04 for each o f the four operation quadrants.
Figure 5.39
shows
which o f the limit settings is applied in each quadrant.
Note: The maxim um output torque is ultim ately limited by the drive output current. O utput torque will not exceed the limit set for the
drive rated current, even if the torque limits are set to higher values.
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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