2.8 L: Protection Functions
208 YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Figure 2.75 illustrates the function of Stall Prevention during deceleration.
Figure 2. 75
Figure 2.75 Stall Prevention During Deceleration
n L3-05: Stall Prevention Selection during Run
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.
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).
n
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 Analog Input Terminal Settings
on page 195 for details.
n
L3-23: Automatic Reduction Selection for Stall Prevention during Run
This function reduces the Stall Prevention during run level in the constant power range.
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.
No. Name Setting Range Default
L3-05 Stall Prevention Selection during Run 0 to 2 1
No. Name Setting Range Default
L3-06 Stall Prevention Level During Run 30 to 150% 120%
No. Name Setting Range Default
L3-23
Automatic Diminution Selection for Stall Prevention
Level during Run
0 or 1 0
Output Frequency
Deceleration characteristics
when Stall Prevention was
triggered during deceleration
Time
specified deceleration time
MV1000ParameterGuide_E_conditional.book 208 ページ ２０１３年１０月１１日 金曜日 午後８時１８分
To Next Page
Loading...
