5.8 L: Protection Functions
■ L3-05: Stall Prevention Selection during Run
Determines how Stall Prevention works during Run. Stall Prevention during run prevents the motor from stalling by
automatically reducing the speed when a transient overload occurs while the motor is running at constant speed.
No.
Name
Setting Range
Default
L3-05
Stall Prevention Selection during Run
0 to 2
1
Note: 1. This function is available in V /f control mode.
2. Stall Prevention during run is disabled w hen the output frequency is 6 Hz or low er regardless o f the L3-05 and L3-06 settings.
Setting 0: Disabled
Drive runs at the set speed 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 ramp 1
(C1-02). Once the current level drops below the value o f L3-06 minus 2% for 100 ms, the drive accelerates back to the
speed reference at the active acceleration ramp.
Setting 2: Decelerate using C1-04
Same as setting 1 except the drive decelerates at decel ramp 2 (C1-04).
■ L3-06: Stall Prevention Level during Run
Sets the Stall Prevention level during run as a percentage o f the drive rate output current.
No.
Name
Setting Range
Default
L3-06
Stall Prevention L evel during Run
30 to 150% <1>
<1>
<1> The upper limit and default for this setting is determined by L8-38.
♦ L4: Speed Detection
These parameters set up the speed agree and speed detection functions which can be assigned to the multi-function
output terminals.
■ L4-01, L4-02: Speed Agreement Detection Level and Detection Width
Parameter L4-01 sets the detection level for the digital output functions “User-set speed agree 1,” “Speed detection 1,”
and “Speed detection 2.”
Parameter L4-02 sets the hysteresis level for these functions.
No.
Name
Setting Range
Default
L4-01
Speed Agreement Detection Level
0.0 to 100.0%
0.0%
L4-02
Speed Agreement Detection Width
0.0 to 40.0%
4.0%
For details on setting 2, 3, 4, and 5, refer to
H2-01 to H2-05: Terminals M1-M2, M3-M4, M5-M6, P1-PC, andP1-P2
Function Selection on page 175.
■ L4-03, L4-04: Speed Agreement Detection Level and Detection Width (+/-)
Parameter L4-03 sets the detection level for the digital output functions “Speed agree 2,” “User-set speed agree 2,”
“Speed detection 3,” and “Speed detection 4.”
Parameter L4-04 sets the hysteresis level for these functions.
No.
Name
Setting Range
Default
L4-03
Speed Agreement Detection L evel (+/-)
-100.0 to 100.0%
0.0%
L4-04
Speed Agreement Detection Width (+/-)
0.0 to 40.0%
4.0%
For details on setting 13, 14, 15, and 16, refer to
H2-01 to H2-05: Terminals M1-M2, M3-M4, M5-M6, P1-PC, andP1-
P2 Function Selection on page 175.
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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