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L7-06: Torque Limit Integral Time Constant
Sets the integral time constant for the torque limit function.
No. Name Setting Range Default
L7-06 Torque Limit Integral Time Constant 5 to 10000 ms 200 ms
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L7-07: Torque Limit Control Method Selection during Accel/Decel
Selects the function of torque limit during acceleration and deceleration.
No. Name Setting Range Default
L7-07
Torque Limit Control Method Selection during Acceleration/
Deceleration
0 or 1 0
Setting 0: Proportional Control
The torque limit function works with P-control during
acceleration and deceleration and switches to I-control at constant
speed. Use this setting when acceleration or deceleration to the desired speed has priority over torque limitation during
speed changes.
Setting 1: Integral Control
The torque limit function always uses I-control. Use this setting when high accuracy torque limitation is required even
during speed changes. Using this function may increase the acceleration time, or may prevent the motor speed from reaching
the frequency reference when the torque limit is reached before.
u
L8: Hardware Protection
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L8-01: Internal Dynamic Braking Resistor Protection Selection (ERF type)
This
parameter selects the dynamic braking resistor protection
when using an optional heatsink mounted braking resistor
(ERF type, 3% ED).
No. Name Setting Range Default
L8-01 Internal Braking Resistor Protection 0 or 1 0
Setting 0: Disabled
Disables the braking resistor protection. Use this setting
for any braking option other than the Yaskawa ERF Type resistor.
Setting 1: Enabled
Enables the protection for ERF type resistors.
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L8-02: Overheat Alarm Level
Sets the overheat alarm (oH) detection level.
The drive will output an alarm when the heatsink temperature exceeds the alarm level set in parameter L8-02. If the
temperature reaches the overheat fault level, the drive will trigger an oH1 fault and stop operation.
When an output terminal is set for the oH pre-alarm (H2-01/02/03 = 20), the switch will close when the heatsink temperature
rises above L8-02.
No. Name Setting Range Default
L8-02 Overheat Alarm Level 50 to 130 °C Depending on size
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L8-03: Overheat Pre-Alarm Operation Selection
Sets the operation when an overheat pre-alarm is detected.
No. Name Setting Range Default
L8-03 Overheat Pre-Alarm Operation 0 to 4 3
Setting 0: Ramp to Stop
If an overheat alarm occurs, the drive decelerates to stop using the selected deceleration time. If a digital output is
programmed for “fault” (H2-01/02/03 = E), this output will be triggered.
Setting 1: Coast to Stop
If an overheat alarm occurs, the drive switches
off the output and the motor coasts to stop. If a digital output is programmed
for “fault” (H2-01/02/03 = E), this output will be triggered.
5.8 L: Protection Functions
224
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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