YASKAWA FSDrive-MV1000 Parameter Manual page 208

2.8 L: Protection Functions
Figure 2.75 illustrates the function of Stall Prevention during deceleration.
Figure 2.75
L3-05: Stall Prevention Selection during Run
n
Stall Prevention during run can prevent a motor from stalling by automatically reducing the speed when a transient
overload occurs while the motor is running at constant speed.
This parameter determines how Stall Prevention works during run.
This parameter determines how Stall Prevention works during run.
No.
L3-05 Stall Prevention Selection during Run
Note: 1. This function is only available in V/f Control.
2. When output frequency is 6 Hz or less, Stall Prevention during run is disabled regardless of the setting in L3-05 and L3-06.
Setting 0: Disabled
Drive runs at the set frequency reference. A heavy load may cause the motor to stall and trip the drive with an OC or oL
fault.
Setting 1: Decelerate using C1-02
If the current exceeds the Stall Prevention level set in parameter L3-06, then the drive will decelerate at decel time 1
(C1-02). When the current level drops below the value of L3-06 minus 2% for 100 ms, the drive accelerates back to the
frequency reference at the active acceleration time.
Setting 2: Decelerate using C1-04
Same as setting 1 except that the drive decelerates at decel time 2 (C1-04).
L3-06: Stall Prevention Level during Run
n
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 195 for details.
No.
L3-06
L3-23: Automatic Reduction Selection for Stall Prevention during Run
n
This function reduces the Stall Prevention during run level in the constant power range.
No.
Automatic Diminution Selection for Stall Prevention
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.
208
Output Frequency
specified deceleration time
Figure 2.75 Stall Prevention During Deceleration
Name
Name
Stall Prevention Level During Run
Name
Level during Run
Deceleration characteristics
when Stall Prevention was
triggered during deceleration
Time
Setting Range
0 to 2
Setting Range
30 to 150%
Setting Range
0 or 1
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Default
1
Analog Input Terminal Settings
Default
120%
Default
0