YASKAWA GA700 Technical Manual page 862

11.9 L: Protection Function
Note:
• Maximum output torque is limited by the drive output current. Torque is limited to 150% of the rated output current for Heavy Duty
Rating (HD) and to 120% of the rated output current for Normal Duty Rating (ND). The actual output torque will not 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 lower the torque limit value too much. When the torque limit function is
triggered, falls and slipping rollbacks may occur due to sudden acceleration stops and stalls of the motor.
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Configuring Settings
Set torque limits using one of the following methods.
• Individually set the four torque limit quadrants using L7-01 tto L7-04 [Torque Limit].
• Individually set the four torque limit quadrants via MFAI. Set H3-02, H3-06, H3-10 = 10, 11, 12 [MFAI
Function Select = Forward/Reverse/Regenerative Torque Limit].
• Set all four torque limit quadrants commonly via 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 configuration method for each quadrant.
Note:
The lower value is enabled when both L7-01 to L7-04 and either analog inputs or communication option torque limits set torque limits
for the same quadrant.
As in the following example of parameter settings, the torque limit for quadrant 1 is 130% and the torque limit for quadrants 2, 3, and 4
is 150%.
Settings: L7-01 = 130%, L7-02, L7-03, L7-04 = 200%, MFAI torque limit = 150%
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L7-01: Forward Torque Limit
No.
Name
(Hex.)
L7-01 Forward Torque
Limit
(04A7)
RUN
Note:
• The smallest set torque limit is enabled when sets H3-02, H3-06, or H3-10 = 10, 15 [MFAI Function Select = Forward Torque Limit,
General Torque Limit], or when torque limits are set with the communication option.
• When increasing the setting value, when the drive capacity is greater than or equal to the motor output. Note that issues of oC [Drive
Overcurrent] may occur if the setting value is too high.
• Note that the motor may stall If the setting is too low when used with significant loads.
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L7-02: Reverse Torque Limit
No.
Name
(Hex.)
L7-02 Reverse Torque Limit
(04A8)
RUN
862
Figure 11.136 Torque Limits and Analog Input Settings Parameters
V/f CL-V/f OLV
On the basis that the motor rated torque is the 100% value, this parameter
sets the torque limit value for forward motoring as a percentage.
V/f CL-V/f OLV
Sets the torque limit value for reversed motoring as a percentage of the
motor rated torque.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
CLV AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
CLV AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
200%
(0 - 300%)
Default
(Range)
200%
(0 - 300%)