L3: Stall Prevention - YASKAWA GA700 Technical Manual

10.11 L: Protection Functions
No.
Name
(Hex.)
L2-30 KEB Zero Speed
Operation
(045E)
Expert
L2-31 KEB Start Voltage
Offset Level
(045D)
Expert
◆

L3: Stall Prevention

No.
Name
(Hex.)
L3-01 Stall Prevention
during Accel
(048F)
L3-02 Stall Prevent Level
during Accel
(0490)
L3-03 Stall Prevent Limit
during Accel
(0491)
L3-04 Stall Prevention
during Decel
(0492)
L3-05 Stall Prevention
during RUN
(0493)
570
Description
V/f CL-V/f OLV CLV AOLV
Sets the operation when the output frequency decreases below the
zero level (DC braking injection starting frequency) during KEB
deceleration when L2-01 = 3 to 5 [Momentary Power Loss Ope
Select = KEB Mode, KEB Stop Mode, or KEB Decel to Stp].
0 : Baseblock
1 : DC/SC Braking
V/f CL-V/f OLV CLV AOLV
Sets the KEB start voltage offset.
Description
V/f CL-V/f OLV CLV AOLV
Sets the method of the Stall Prevention During Acceleration.
0 : Disabled
1 : Enabled
2 : Intelligent (Ignore Accel Ramp)
3 : Current Limit Method
V/f CL-V/f OLV CLV AOLV
Sets the output current level to start Stall Prevention during
acceleration as a percentage of the drive rated output current.
V/f CL-V/f OLV CLV AOLV
Sets the lower limit for the stall prevention level during acceleration
used for constant output ranges as a percentage of the drive rated
output current.
V/f CL-V/f OLV CLV AOLV
Sets the method that the drive will use to prevent overvoltage faults
when decelerating.
Note:
1. To connect a dynamic braking option (braking resistor or
braking resistor unit) to the drive, set this parameter to 0 or 3.
Parameter values 1, 2, 4, and 5 will enable Stall Prevention
function during deceleration, and the dynamic braking option
will not function.
2. The setting range changes when the A1-02 [Control Method
Selection] value changes:
• When A1-02 = 5 [PM Open Loop Vector], setting range is 0
to 2
• When A1-02 = 6, 7, or 8 [PM Advanced Open Loop Vector,
PM Closed Loop Vector, or EZ Vector Control], setting
range is 0, 1.
0 : Disabled
1 : General Purpose
2 : Intelligent (Ignore Decel Ramp)
3 : General Purpose w/ DB resistor
4 : Overexcitation/High Flux
5 : Overexcitation/High Flux 2
V/f CL-V/f OLV CLV AOLV
Sets the function to enable and disable Stall Prevention During Run.
Note:
An output frequency less than 6 Hz will disable Stall Prevention
during Run regardless of L3-05 and L3-06 [Stall Prevent Level
during Run] settings.
0 : Disabled
1 : Deceleration Time 1 (C1-02)
2 : Deceleration Time 2 (C1-04)
3 : Intelligent
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
Ref.
(Range)
0 955
(0, 1)
Determined by A1- 955
02
(200 V Class: 0 -
100 V, 400 V
Class: 0 - 200 V)
Default
Ref.
(Range)
1 956
(0 - 3)
Determined by C6- 958
01 and L8-38
(0 - 150%)
50% 958
(0 - 100%)
1 958
(Determined by
A1-02)
Determined by A1- 960
02
(0 - Determined by
A1-02)