L6: Torque Detection - YASKAWA L1000V Technical Manual

5.8 L: Protection Functions
Setting 1: No limit on auto-reset attempts after Uv1
u L6: Torque Detection
The drive provides two independent torque detection functions that trigger an alarm or fault signal when the load is too
heavy (oL), or suddenly drops (UL). These functions are set up using the L6-
as shown below to indicate the underload or overload condition to an external device:
NOTICE: Damage to Equipment. Use the the Torque Detection function of the drive to notify the PLC of potential overcurrent or
overload situations at the load prior to a drive overload fault. Failure to comply may cause the drive to fault with a coasting motor and
potentially damage equipment.
Note: When overtorque occurs in the application, the drive may stop due to overcurrent (oC) or overload (oL1). To prevent this, an
overload situation should be indicated to the controller before oC or oL1 occur in the drive. Use the torque detection for this
purpose.
H2-01 through H2-05 Setting
B
18
Figure 5.28 and Figure 5.29
Figure 5.28
Torque detection 1 (NO)
Torque detection 2 (NO)
Figure 5.29
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.
n
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.
142
Torque detection 1, N.O. (output closes when overload or underload is detected)
Torque detection 2, N.O. (output close when overload or underload is detected)
show the function of overtorque and undertorque detection.
Motor current / torque
L6-02/05
L6-03/06
or
Figure 5.28 Overtorque Detection Operation
Motor current / torque
L6-02/05
L6-03/06
or
Figure 5.29 Undertorque Detection Operation
Name
Torque Detection Selection 1
Torque Detection Selection 2
YASKAWA EUROPE SIEP
Description
10 % hysteresis
L6-03/06
ON
10 % hysteresis
L6-03/06
ON
parameters. Program the digital outputs
common_TMo
10 % hysteresis
ON
c o m m o
n_TMon
ly
ON
Setting Range
0 to 8
0 to 8
YASKAWA AC Drive L1000V Technical Manual
Default
0
0