YASKAWA A1000 Technical Manual page 292

5.8 L: Protection Functions

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 frequency 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 Run 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 frequency 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 Run 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 frequency reference, i.e., no detection during
acceleration and deceleration. The operation continues after detection and a UL3 or UL4 alarm is triggered.
Setting 6: UL3, UL4 at Run (Alarm)
Undertorque detection works as long as the Run command is active. The operation continues after detection and a UL3 or
UL4 alarm is triggered.
Setting 7: UL3, UL4 at Speed Agree (Fault)
Undertorque detection is active only when the output speed is equal to the frequency reference, i.e., no detection during
acceleration and deceleration. The operation is stopped and a UL3 or UL4 fault is triggered.
Setting 8: UL3, UL4 at run (Fault)
Undertorque detection works as long as a Run command is active. Operation stops and a UL3 or UL4 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 and OLV/PM control modes
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. When Mechanical Weakening detection is enabled (L6-08  0), the level for
L6-02 is set as a percentage of the drive' rated output current in all control modes.
No.
L6-02
L6-05
Note: The torque detection level 1 (L6-02) can also be supplied by an analog input terminal set to H3- = 7. Here, the analog value
has priority and the setting in L6-02 is disregarded. Torque detection level 2 (L6-05) cannot be set by an analog input.

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
292
Name
Torque Detection Selection 1
Torque Detection Selection 2
Name
Torque Detection Level 1
Torque Detection Level 2
Name
Torque Detection Time 1
Torque Detection Time 2
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Setting Range
0 to 8
0 to 8
Setting Range
0 to 300%
0 to 300%
Setting Range
0.0 to 10.0 s
0.0 to 10.0 s
Default
0
0
Default
150%
150%
Default
0.1 s
0.1 s