YASKAWA FSDrive-MV1000 Series, Руководство по параметрам

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2.8 L: Protection Functions
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 213
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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). They are set up using the L6-
†† parameters. To indicate the underload or overload
condition to an external device, contact outputs should be programmed as shown below.
NOTICE: 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 occurs in the drive. Use the torque detection for this
purpose. Use undertorque detection to discover application problems like a torn belt, a pump shutting off, or other similar
trouble.
Figure 2.77 and Figure 2.78 show the function of overtorque and undertorque detection.
Figure 2.77
Figure 2.77 Overtorque Detection Operation
Figure 2.78
Figure 2.78 Undertorque Detection Operation
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 Control, the level is set as a percentage of the drive rated output current. In CLV, it is set as a percentage of the motor rated
torque.
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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.
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.
H2-01, H2-02,
H2-03 Setting
Name
B Torque detection 1, N.O. (output closes when overload or underload is detected)
17 Torque detection 1, N.C. (output opens when overload or underload is detected)
18 Torque detection 2, N.O. (output close when overload or underload is detected)
19 Torque detection 2, N.C. (output opens when overload or underload is detected)
No. Name Setting Range Default
L6-01 Torque Detection Selection 1 0 to 8 0
L6-04 Torque Detection Selection 2 0 to 8 0
Motor current / torque
L6-02/05
10 % hysteresis
Torque detection 1 (NO)
or
Torque detection 2 (NO)
L6-03/06
ON (closed)
L6-03/06
10 % hysteresis
ON (closed)
common_TMonly
Motor current / torque
L6-02/05
10 % hysteresis
Torque detection 1 (NO)
or
Torque detection 2 (NO)
L6-03/06
ON (closed)
L6-03/06
ON (closed)
common_TMonly
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