YASKAWA CIPR-GA50C series Technical Manual page 688

12.9 L: Protection Functions
The drive decreases the Stall Prevention level during run in the constant power range. The lower limit is 40% of
L3-06 value.
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L3-24: Motor Accel Time @ Rated Torque
No.
Name
(Hex.)
L3-24 Motor Accel Time @ Rated
Torque
(046E)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 1 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2]
• L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Decel Ramp)]
• L3-11 = 1 [Overvoltage Suppression Select = Enabled]
• H1-xx = 7A or 7B [MFDI Function Select = KEB Ride-Thru 2 Activate (N.O./N.C.)]
Note:
When Auto-Tuning changes the value of E2-11 [Motor Rated Power (kW)], the drive will automatically set this parameter to the value
for a Yaskawa standard motor (4 poles). When you use a PM motor, the drive uses the value in E5-01 [PM Motor Code Selection] to
change L3-24.
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L3-25: Load Inertia Ratio
No.
Name
(Hex.)
L3-25 Load Inertia Ratio
(046F)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 1 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2]
• L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Decel Ramp)]
• L3-11 = 1 [Overvoltage Suppression Select = Enabled]
• H1-xx = 7A or 7B [MFDI Function Select = KEB Ride-Thru 2 Activate (N.O./N.C.)]
Note:
• If you set this value incorrectly when L2-29 = 1, H1-xx = 7A or 7B, or L3-11 = 1, it can cause large current ripples and ov
[Overvoltage], Uv1 [DC Bus Undervoltage], or oC [Overcurrent] faults.
• KEB Tuning will automatically set this value.
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L3-26: Additional DC Bus Capacitors
No.
Name
(Hex.)
L3-26 Additional DC Bus
Capacitors
(0455)
Expert
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L3-27: Stall Prevention Detection Time
No.
Name
(Hex.)
L3-27 Stall Prevention Detection
Time
(0456)
■
L3-34: Torque Limit Delay Time
No.
Name
(Hex.)
L3-34 Torque Limit Delay Time
(016F)
Expert
When vibration occurs during operation of Single Drive KEB Ride-Thru 2, increase this parameter in 0.010-unit
increments.
688
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the motor acceleration time to reach the maximum frequency at the motor rated torque for
stopped single-drive motors.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the ratio between motor inertia and machine inertia.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the capacity for external main circuit capacitors. Usually it is not necessary to change this
setting. Sets this parameter when you use the KEB Ride-Thru function.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets a delay time between reaching the Stall Prevention level and starting the Stall Prevention
function.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the filter time constant that returns the torque limit to its initial value when KEB operation
operates in Single Drive KEB Ride-Thru mode.
Description
Description
Description
Description
Description
YASKAWA SIEPC71061753A GA500 Technical Manual
Default
(Range)
Determined by o2-04, C6-
01, E2-11, and E5-01
(0.001 - 10.000 s)
Default
(Range)
1.0
(0.1 - 1000.0)
Default
(Range)
0 μF
(0 to 65000 μF)
Default
(Range)
60 ms
(0 - 5000 ms)
Default
(Range)
Determined by A1-02
(0.000 - 1.000 s)