L8: Drive Protection - YASKAWA A1000 Technical Manual


L7-07: Torque Limit Control Method Selection during Accel/Decel
Selects the function of torque limit during acceleration and deceleration.
No.
L7-07
Setting 0: Proportional control
The torque limit function works with P control during accel and decel, and switches to I control at constant speed. Use
this setting when accelerating or decelerating to the desired speed has priority over the torque limit during speed changes.
Setting 1: Integral control
The torque limit function always uses I control. Use this setting when a highly accurate torque limit 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 if the torque limit is reached first.

L7-16: Torque Limit Process at Start
Assigns a time filter to allow the torque limit to build at start.
No.
L7-16
Setting 0: Disabled
Toque limit is created at start without a delay time. Disable L7-16 to maximize response time when the application
requires sudden acceleration or deceleration at start.
Setting 1: Enabled
A time filter is added to allow the torque limit to build at start.
 L8: Drive Protection

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).
Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.
No.
L8-01 Internal Dynamic Braking Resistor Protection Selection (ERF type)
Setting 0: Disabled
Disables braking resistor protection. Use this setting for any dynamic braking option other than the YASKAWA ERF
type resistor.
Setting 1: Enabled
Enables protection for YASKAWA ERF type resistors.

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- = 20), the switch will close when the heatsink temperature
rises above L8-02.
No.
L8-02
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Name
Torque Limit Control Method Selection during Accel/Decel
Name
Torque Limit Process at Start
Name
Name
Overheat Alarm Level
5.8 L: Protection Functions
Setting Range Default
0 or 1
Setting Range Default
0 to 1
Setting Range Default
0 or 1
Setting Range Default
Determined by C6-01 and
50 to 150 °C
0
1
0
5
o2-04
295