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12.7 L: Protection Functions
332 YASKAWA SIEPYEULA5001C LA500 Technical Manual
The drive runs at the set frequency reference. A heavy load can cause the motor to stall and trip the drive with oC
[Overcurrent] or oL1 .
1 : Deceleration Time 1 (C1-02)
The drive will decelerate for the time set in C1-02 [Deceleration Time 1] when the current is more than the Stall
Prevention level set in L3-06 . When the current level is less than the “ L3-06 setting value - 2% ” for 100 ms, the
drive accelerates again for the acceleration time applicable at that time until it is at the set frequency.
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L3-06: Stall Prevent Level during Run
No.
(Hex.)
Name Description
Default
(Range)
L3-06
(0494)
Expert
Stall Prevent Level during
Run
Sets the output current level at which the Stall Prevention function is enabled during run when the
drive rated output current is 100%.
Determined by L8-38
(30 - 165%)
Note:
This parameter is applicable when L3-05 = 1 [Stall Prevention during RUN = Deceleration Time 1 (C1-02)] .
◆
L4: Speed Detection
L4 parameters set the output of signals to the MFDO terminals, for example frequency agree and speed detection.
■
L4-01: Speed Agree Detection Level
No.
(Hex.)
Name Description
Default
(Range)
L4-01
(0499)
Speed Agree Detection
Level
Sets the level to detect speed agree or motor speed.
0.0 Hz
(0.0 - 120.0 Hz)
Sets the level to detect speed agree or motor speed when H2-01 to H2-03 = 2, 3, 4, 5 [MFDO Function Selection
= Speed Agree 1, User-set Speed Agree 1, Frequency Detection 1, Frequency Detection 2] .
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L4-02: Speed Agree Detection Width
No.
(Hex.)
Name Description
Default
(Range)
L4-02
(049A)
Speed Agree Detection
Width
Sets the width to detect speed agree or motor speed.
2.0 Hz
(0.0 - 20.0 Hz)
Sets the width to detect speed agree or motor speed when H2-01 to H2-03 = 2, 3, 4, 5 [MFDO Function Selection
= Speed Agree 1, User-set Speed Agree 1, Frequency Detection 1, Frequency Detection 2] .
■
L4-03: Speed Agree Detection Level(+/-)
No.
(Hex.)
Name Description
Default
(Range)
L4-03
(049B)
Speed Agree Detection
Level(+/-)
Sets the level to detect speed agree or motor speed.
0.0 Hz
(-120.0 - 120.0 Hz)
Sets the level to detect speed agree or motor speed when H2-01 to H2-03 = 13, 14, 15, 16 [MFDO Function
Selection = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4] .
■
L4-04: Speed Agree Detection Width(+/-)
No.
(Hex.)
Name Description
Default
(Range)
L4-04
(049C)
Speed Agree Detection
Width(+/-)
Sets the width to detect speed agree or motor speed.
2.0 Hz
(0.0 - 20.0 Hz)
Sets the width to detect speed agree or motor speed when H2-01 to H2-03 = 13, 14, 15, 16 [MFDO Function
Selection = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4] .
◆
L5: Fault Restart
The Auto Restart function tries to keep machines operating when the drive detects a transient fault.
V/f OLV
V/f OLV
V/f OLV
V/f OLV
V/f OLV