Parameter List
10
10.11 L: Protection Functions
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 517
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L3-26
(0455)
Expert
Additional DC Bus
Capacitors
Sets the capacity for external main circuit capacitors. Usually it is not necessary to
change this parameter.
0 μF
(0 to 65000 μF)
756
L3-27
(0456)
Stall Prevention
Detection Time
Sets a delay time between reaching the Stall Prevention level and starting the Stall
Prevention function.
50 ms
(0 - 5000 ms)
756
L3-35
(0747)
Expert
Speed Agree Width for
Auto Decel
Sets the width for speed agreement when L3-04 = 2 [Stall Prevention during Decel =
Intelligent (Ignore Decel Ramp)]. Usually it is not necessary to change this setting.
0.00 Hz
(0.00 - 1.00 Hz)
756
L3-36
(11D0)
Current Suppression
Gain@Accel
Sets the gain to suppress current and motor speed hunting during operation when L3-01
= 3 [Stall Prevention during Accel = Current Limit Method]. Usually it is not necessary
to change this setting.
Determined by A1-02
(0.0 - 100.0)
757
L3-37
(11D1)
Expert
Current Limit P Gain @
Accel
Suppresses current hunting during acceleration. Usually it is not necessary to change
this setting.
5 ms
(0 - 100 ms)
757
L3-38
(11D2)
Expert
Current Limit I Time @
Accel
Suppresses current hunting and overshooting that occurs when the drive stalls during
acceleration. Usually it is not necessary to change this setting.
10.0
(0.0 - 100.0)
757
L3-39
(11D3)
Current Limit Filter
Time @Accel
Sets the time constant to adjust the acceleration rate when L3-01 = 3 [Stall Prevention
during Accel = Current Limit Method]. Usually it is not necessary to change this
setting.
100.0 ms
(1.0 - 1000.0 ms)
757
L3-40
(11D4)
Current Limit S-Curve
@ Acc/Dec
Sets the function to enable and disable the best S-curve characteristic used for current-
limited acceleration.
0 : Disable
1 : Enabled
0
(0, 1)
757
◆ L4: Speed Detection
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L4-01
(0499)
Speed Agree Detection
Level
Sets the level to detect speed agree or motor speed.
Sets the level to detect speed agree or motor speed when H2-01 to H2-05 = 2, 3, 4, 5
[MFDO Function Selection = Speed Agree 1, User-set Speed Agree 1, Frequency
Detection 1, Frequency Detection 2].
Determined by A1-02
(Determined by A1-02)
758
L4-02
(049A)
Speed Agree Detection
Width
Sets the width to detect speed agree or motor speed.
Sets the width to detect speed agree or motor speed when H2-01 to H2-05 = 2, 3, 4, 5
[MFDO Function Selection = Speed Agree 1, User-set Speed Agree 1, Frequency
Detection 1, Frequency Detection 2].
Determined by A1-02
(Determined by A1-02)
758
L4-03
(049B)
Speed Agree Detection
Level(+/-)
Sets the level to detect speed agree or motor speed.
Sets the level to detect speed agree or motor speed when H2-01 to H2-05 = 13, 14, 15,
16 [MFDO Function Selection = Speed Agree 2, User-set Speed Agree 2, Frequency
Detection 3, Frequency Detection 4].
Determined by A1-02
(Determined by A1-02)
758
L4-04
(049C)
Speed Agree Detection
Width(+/-)
Sets the width to detect speed agree or motor speed.
Sets the width to detect speed agree or motor speed when H2-01 to H2-05 = 13, 14, 15,
16 [MFDO Function Selection = Speed Agree 2, User-set Speed Agree 2, Frequency
Detection 3, Frequency Detection 4].
Determined by A1-02
(Determined by A1-02)
758
L4-05
(049D)
Fref Loss Detection
Selection
Sets the operation when the drive detects a loss of frequency reference.
0 : Stop
1 : Run at (L4-06 x Last Reference)
0
(0, 1)
758
L4-06
(04C2)
Frequency Reference
@Loss of Ref
Sets the frequency reference as a percentage to continue drive operation after it detects a
frequency reference loss. The value is a percentage of the frequency reference before
the drive detected the loss.
80.0%
(0.0 - 100.0%)
759
L4-07
(0470)
Speed Agree Detection
Selection
Sets the condition that activates speed detection.
0 : No Detection during Baseblock
1 : Detection Always Enabled
0
(0, 1)
759
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