YASKAWA L1000A Technical Manual page 233

Figure 5.41
Torque detection 1 (NO)
Torque detection 2 (NO)
Note: 1. The torque detection function uses a hysteresis of 10% of the drive rated output current and motor rated torque.
2. In V/f, the level is set as a percentage of the drive rated output current. In OLV, CLV, and CLV/PM, it is set as a percentage of the
motor rated torque.
■ L6-01, L6-04: Torque Detection Selection 1, 2
The torque detection function is triggered when the current or torque exceeds the levels set in L6-02 and L6-05 for longer
than the time set in L6-03 and L6-06. L6-01 and L6-04 select the conditions for detection and the operation that follows.
No.
L6-01
L6-04
Setting 0: Disabled
Setting 1: oL3, oL4 at speed agree (Alarm)
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 continues after detection and an oL3/oL4 alarm is triggered.
Setting 2: oL3, oL4 at run (Alarm)
Overtorque 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 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.
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Motor current / torque
L6-02/05
L6-03/06
or
ON
Figure 5.41 Undertorque Detection Operation
Parameter Name
Torque Detection Selection 1
Torque Detection Selection 2
5.8 L: Protection Functions
10% hysteresis
common_T
Monly
L6-03/06
ON
Setting Range
0 to 8
0 to 8
Default
0
0
5
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