YASKAWA FSDrive-MV1000 Parameter Manual page 214

2.8 L: Protection Functions
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., there is 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
n
These parameters set the overtorque/undertorque detection levels for torque detection function 1 and 2. In V/f control,
these levels are set as a percentage of the drive rated output current. In OLV control mode, the levels are set as a
percentage of the motor rated torque.
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-
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
n
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
Mechanical Weakening Detection
n
This function detects mechanical weakening of a machine that leads to overtorque or undertorque situations after a
certain machine operation time has elapsed.
The function is activated in the drive when the cumulative operation counter U4-01 exceeds the time set in parameter
L6-11. Mechanical Weakening Detection uses the torque detection 1 settings (L6-01 to L6-03) and triggers an oL5
(Mechanical Weakening Detection 1) or UL5 (Mechanical Weakening Detection 2) fault when overtorque or undertorque
occurs in the speed range determined by parameters L6-08 and L6-09. The operation of the drive after detection of oL5
or UL5 is set by parameter L6-08.
To output a signal for Mechanical Weakening Detection, set H2-
214
Name
Torque Detection Level 1
Torque Detection Level 2
Name
Torque Detection Time 1
Torque Detection Time 2
Setting Range
0 to 300%
0 to 300%
Setting Range
0.0 to 10.0 s
0.0 to 10.0 s
to 22.
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Default
150%
150%
= 7. Here, the analog input
Default
0.1 s
0.1 s