Parameter Details
11
11.9 L: Protection Function
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 757
Set this parameter when hunting occurs while you use a frequency reference through an analog input.
■ L3-36: Current Suppression Gain@Accel
No.
(Hex.)
Name Description
Default
(Range)
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)
If there is vibration in the output current during acceleration, increase the setting value.
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
■ L3-37: Current Limit P Gain @ Accel
No.
(Hex.)
Name Description
Default
(Range)
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)
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
■ L3-38: Current Limit I Time @ Accel
No.
(Hex.)
Name Description
Default
(Range)
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)
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
■ L3-39: Current Limit Filter Time @Accel
No.
(Hex.)
Name Description
Default
(Range)
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)
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
■ L3-40: Current Limit S-Curve @ Acc/Dec
No.
(Hex.)
Name Description
Default
(Range)
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
(0, 1)
Makes the best motor acceleration rate for start up. If you set this parameter to 1, it will make acceleration
smoother, but it can also increase the acceleration time to be longer than the set time. If the drive detects oC
[Overcurrent] faults immediately after acceleration starts, set this parameter.
0 : Disable
1 : Enabled
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
◆ L4: Speed Detection
L4 parameters set the output of signals such as frequency agree and speed detection to the MFDO terminals. The
motor speed is used for searches when using Closed Loop Vector Control.
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