Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 727
Figure 12.130 Torque Limits and Analog Input Setting Parameters
Note:
• When L7-01 to L7-04 and analog inputs or communication option torque limits set torque limits for the same quadrant, the drive
enables the lowest value.
In this 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 to L7-04 = 200%, and MFAI torque limit = 150%
• The drive output current limits maximum output torque. The torque limit is 150% of the rated output current for HD and to 120% of
the rated output current for ND. The actual output torque is not more than the limits of the drive rated output current when you set the
torque limit to a high value.
■ L7-01: Forward Torque Limit
No.
(Hex.)
Name Description
Default
(Range)
L7-01
(04A7)
RUN
Forward Torque Limit
Sets the torque limit value for forward motoring as a percentage, where motor rated torque is the
100% value.
200%
(0 - 300%)
Note:
• The lower torque limit is enabled when you set the torque limit by the following method.
–Set H3-02 or H3-10 = 10, 15 [MFAI Function Select = Forward Torque Limit, General Torque Limit].
–Use a communication option to set the torque limits
• You must think about drive capacity when a large quantity of torque is necessary. If you set the value too high, the drive can detect oC
[Overcurrent].
• If you set the value too low with large loads, the motor can stall.
■ L7-02: Reverse Torque Limit
No.
(Hex.)
Name Description
Default
(Range)
L7-02
(04A8)
RUN
Reverse Torque Limit
Sets the torque limit value for reversed motoring as a percentage, where motor rated torque is the
100% value.
200%
(0 - 300%)
Note:
• The lower torque limit is enabled when you set the torque limit by the following method.
–Set H3-02 or H3-10 = 10, 15 [MFAI Function Select = Forward, Reverse/Regenerative Torque Limit].
–Use a communication option to set the torque limits
• You must think about drive capacity when a large quantity of torque is necessary. If you set the value too high, the drive can detect oC
[Overcurrent].
• If you set the value too low with large loads, the motor can stall.
■ L7-03: Forward Regenerative Trq Limit
No.
(Hex.)
Name Description
Default
(Range)
L7-03
(04A9)
RUN
Forward Regenerative Trq
Limit
Sets the torque limit value for forward regenerative conditions as a percentage of the motor rated
torque.
200%
(0 - 300%)
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