YASKAWA CR700, Техническое руководство, Страница: 759 / 886

Parameter
Details
11
11.9 L: Protection Function
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 759
The drive will continue operation at the frequency reference value set to L4-06 [FreqReference at Reference
Loss] . When the external frequency reference value is restored, the operation is continued with the frequency
reference.
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L4-06: Frequency Reference @Loss of Ref
No.
(Hex.)
Name Description
Default
(Range)
L4-06
(04C2)
Frequency Reference
@Loss of Ref
Sets the frequency reference as a percentage to continue drive operation after it detects a
frequency reference loss. The value is a percentage of the frequency reference before the drive
detected the loss.
80.0%
(0.0 - 100.0%)
Set L4-05 = 1 [Fref Loss Detection Selection = Run at (L4-06 x Last Reference)] to enable this parameter.
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L4-07: Speed Agree Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
L4-07
(0470)
Speed Agree Detection
Selection
Sets the condition that activates speed detection.
0
(0, 1)
0 : No Detection during Baseblock
Detects the frequency while the drive is operating. When the drive turns off its output, it will not detect frequency.
1 : Detection Always Enabled
◆
L7: Torque Limit
The torque limit function limits torque generated by the motor to a constant amount by limiting the internal torque
reference for the drive. This function is used to keep torque applied to loads and the generation of regenerative
torque below a specific amount. This function protects machinery and improves reliability of continuous
operation. Torque limits can be set individually for the four quadrants, which include torque direction (motoring/
regeneration) and direction of motor rotation (forward/reverse). When the torque reference value reaches the set
torque limit, the MFDO terminal set for
During Torque Limit [H2-xx = 30]
turns ON.
Note:
• Maximum output torque is limited by the drive output current. The actual output torque cannot exceed the limits of the drive rated
output current even if the torque limit is set to a high value.
• When using torque limits for lifting applications, do not decrease the torque limit value too much. When the torque limit function is
triggered, falls and load slipping may occur because of sudden acceleration stops and stalls of the motor.
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Setting Method
Use one of these methods to set torque limits:
• Individually set the 4 torque limit quadrants using L7-01 to L7-04 [Torque Limit] .
• Individually set the 4 torque limit quadrants with MFAI. Set H3-02, H3-06, H3-10 = 10, 11, 12 [MFAI Function
Select = Forward/Reverse/Regenerative Torque Limit] .
• Set all 4 torque limit quadrants commonly with MFAI. Set H3-02, H3-06, H3-10 = 15 [General Torque Limit] .
• Set all four torque limit quadrants commonly by the communication option.
The following figure illustrates the setting method for each quadrant.
Figure 11.95 Torque Limits and Analog Input Settings Parameters
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV