L6: Torque Detection - YASKAWA GA800 Programming Manual

2.9 L: Protection Functions
0001 : Enabled (—/–/—/GF)
0010 : Enabled (—/–/oH1/–)
0011 : Enabled (—/–/oH1/GF)
0100 : Enabled (—/ov/—/–)
0101 : Enabled (—/ov/—/GF)
0110 : Enabled (—/ov/oH1/–)
0111 : Enabled (—/ov/oH1/GF)
1000 : Enabled (Uv1/–/—/–)
1001 : Enabled (Uv1/–/—/GF)
1010 : Enabled (Uv1/–/oH1/–)
1011 : Enabled (Uv1/–/oH1/GF)
1100 : Enabled (Uv1/ov/—/–)
1101 : Enabled (Uv1/ov/—/GF)
1110 : Enabled (Uv1/ov/oH1/–)
1111 : Enabled (Uv1/ov/oH1/GF)
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L6: Torque Detection

The overtorque/undertorque detection function prevents damage to machinery and loads.
Overtorque is the when there is too much load on the machine. If the motor current or output torque is at the
overtorque detection level for the overtorque detection time, the drive will output an alarm and turn off the output.
Undertorque is the when a load suddenly decreases. When the motor current or output torque is at the undertorque
detection level for the undertorque detection time, the drive will outupt an alarm and turn off the output.
You can use the undertorque detection function to detect these conditions, for example:
• Machine belt cuts
• Unusual operation of the electromagnetic contactor on the drive output side
• Clogged output side air filters in fans and blowers
• Damage to blade tips and broken string
Note:
If there is oC [Overcurrent] or oL1 [Motor Overload], the drive can stop during overtorque conditions. Use torque detection to identify
overload conditions before the drive detects oC or oL1 and stops. Use this function to detect issues that occur in the application.
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Parameter Setting
You can individually set the two overtorque/undertorque detection functions with the drive. Use the information in
Table 2.70 to set the parameters.
Configuration Parameter
MFDO Function Select
• Terminals M1-M2
• Terminals M3-M4
• Terminals M5-M6
Detection conditions and selection of operation after
detection
Detection Level
466
Figure 2.138 Setting Digits and Fault Code
Table 2.70 Overtorque/Undertorque Detection Parameters
Overtorque/Undertorque Detection 1
H2-01, H2-02, and H2-03 = B
N.O.: Activated when detected
H2-01, H2-02, and H2-03 = 17
N.C.: Disactivated when detected
L6-01
L6-02
*1
Analog Input Terminal
H3-xx = 7
Overtorque/Undertorque Detection 2
H2-01, H2-02, and H2-03 = 18
N.O.: Activated when detected
H2-01, H2-02, and H2-03 = 19
N.C.: Disactivated when detected
L6-04
L6-05
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YASKAWA TOEPYAIGA8002B GA800 Drive Programming