YASKAWA G7 Series Technical Manual page 261

Setting the Torque Limit in Parameters
Using L7-01 to L7-04, you can set individually four torque limits in the following directions: Forward drive,
reverse drive, forward regeneration, and reverse regeneration.
Set the Torque Limit Value Using an Analog Input
You can change the analog input level torque limit value by setting the torque limit in multi-function analog
input terminals A2 and A3.
The analog input terminal signal level is factory-set as follows:
Multi-function analog input terminal A2: 4 to 20mA
Multi-function analog input terminal A3: 0 to 10
The following diagram shows the relationship between the torque limits.
Regenerative torque limit
Reverse operation
Negative torque limit
Setting Torque Limits Using Parameters and an Analog Input
The following block diagram shows the relationship between torque limit using parameters and torque limit
using an analog input.
Multi-function analog input
Forward torque limit
Terminal
(set value = 10)
A2 or A3
Negative torque limit
(set value = 11)
Regenerative torque
(set value = 12)
Positive/negative torque limit
(set value = 15)
Forward torque limit
(L7-01)
Reverse torque limit
(L7-02)
Parame-
Forward regenerative torque
limit (L7-03)
Reverse regenerative torque
limit (L7-04)
Fig 6.36 Torque Limit Using Parameters and an Analog Input
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Output torque
Positive
Negative
Fig 6.35 Torque Limit by Analog Input
Positive forward drive
torque
limit
Reverse
drive
reverse
torque
175% of Drive rated current
Machine Protection
Positive/negative torque limits
Forward torque limit
No. of motor rotations
Forward operation
Regenerative torque limit
Positive/negative torque limits
Reverse positive regenerative torque
Forward negative regenerative torque
Min: Minimum value priority circuit
Forward torque limit
Reverse torque limit
Forward regenerative
torque limit
Reverse regenerative
torque limit
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