YASKAWA CIPR-GA50C series, Technical Manual

Page: 688 / 766

12.9 L: Protection Functions
688 YASKAWA SIEPC71061753A GA500 Technical Manual
The drive decreases the Stall Prevention level during run in the constant power range. The lower limit is 40% of
L3-06 value.
■
L3-24: Motor Accel Time @ Rated Torque
No.
(Hex.)
Name Description
Default
(Range)
L3-24
(046E)
Expert
Motor Accel Time @ Rated
Torque
Sets the motor acceleration time to reach the maximum frequency at the motor rated torque for
stopped single-drive motors.
Determined by o2-04, C6-
01, E2-11, and E5-01
(0.001 - 10.000 s)
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.
(Hex.)
Name Description
Default
(Range)
L3-25
(046F)
Expert
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
1.0
(0.1 - 1000.0)
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.
■
L3-26: Additional DC Bus Capacitors
No.
(Hex.)
Name Description
Default
(Range)
L3-26
(0455)
Expert
Additional DC Bus
Capacitors
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.
0 μF
(0 to 65000 μF)
■
L3-27: Stall Prevention Detection Time
No.
(Hex.)
Name Description
Default
(Range)
L3-27
(0456)
Stall Prevention Detection
Time
Sets a delay time between reaching the Stall Prevention level and starting the Stall Prevention
function.
60 ms
(0 - 5000 ms)
■
L3-34: Torque Limit Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L3-34
(016F)
Expert
Torque Limit Delay Time
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.
Determined by A1-02
(0.000 - 1.000 s)
When vibration occurs during operation of Single Drive KEB Ride-Thru 2, increase this parameter in 0.010-unit
increments.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV