YASKAWA FSDrive-MV1000 Parameter Manual page 203

L3-06: Stall Prevention Level during Run
■
Sets the current level to trigger Stall Prevention during run. Depending on the setting of parameter L3-23, the level is
automatically reduced in the constant power range (speed beyond base speed). A setting of 100% is equal to the drive
rated current. The Stall Prevention level can be adjusted using an analog input. Refer to
on page 190 for details.
No.
L3-06 Stall Prevention Level During Run
■ L3-23: Automatic Reduction Selection for Stall Prevention during Run
This function reduces the Stall Prevention during run level in the constant power range.
No.
Automatic Diminution Selection for Stall
L3-23
Setting 0: Disabled
The level set in L3-06 is used throughout the entire speed range.
Setting 1: Enabled
The Stall Prevention level during run is reduced in the constant power range. The lower limit will be 40% of L3-06.
Overvoltage Suppression Function
■
This function suppresses overvoltage faults by decreasing the regenerative torque limit and slightly increasing the output
frequency when the DC bus voltage rises. It can be used to drive loads with cyclic regenerative operation, such as a
punch press or other applications that involve repetitive crank movements.
Note: 1. The motor speed will exceed the frequency reference when overvoltage suppression is triggered. Consequently, overvoltage
suppression is not appropriate in applications that require a perfect match between the frequency reference and the motor speed.
2. Overvoltage may still occur if there is a sudden increase to a regenerative load.
3. This function is enabled only when operating just below the maximum frequency. Overvoltage suppression does not increase the
output frequency beyond the maximum frequency. If this is required by the application, increase the maximum frequency and change
the base frequency setting.
L3-11: Overvoltage Suppression Selection (CLV Control Mode Only)
■
Enables or disables the overvoltage suppression function.
No.
L3-11 Overvoltage Suppression Function Selection
Setting 0: Disabled
The regenerative torque limit and the output frequency are not adjusted. A regenerative load may trip the drive with an
overvoltage fault.
Setting 1: Enabled
When the DC bus voltage rises due to regenerative load, an overvoltage fault is prevented by decreasing the regenerative
torque limit and increasing the output frequency.
■ L3-27: Stall Prevention Detection Time
Sets a delay time from when the Stall Prevention level is reached and the actual Stall Prevention function is activated.
No.
L3-27 Stall Prevention Detection Time
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
Name
Name
Prevention Level during Run
Name
Name
Setting Range
30 to 150%
Setting Range
0 or 1
Setting Range
0 or 1
Setting Range
0 to 5000 ms
2.8 L: Protection Functions
Analog Input Terminal Settings
Default
120%
Default
0
Default
0
Default
50 ms
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