YASKAWA CR700

11.9 L: Protection Function
756 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
This parameter is enabled when L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Accel Ramp)].
Note:
The value of Yaskawa standard motors (4 poles) is automatically set to the value of L3-24 when the setting of E2-11 [Motor Rated
Power (kW)] is changed by the Auto-Tuning process.
Automatic Adjustment of Parameters
Execute Inertia Tuning when A1-02 = 3 [Control Method Selection = Closed Loop Vector]. Parameters are
automatically adjusted.
Manual Parameter Input
Derive the motor acceleration time using the following expression.
• J
Motor
= Moment of inertia of motor (kg m
2
)
• n
rated
= Motor rated speed (min
-1
, r/min)
• T
rated
= Motor rated torque (N∙m)
The rated torque is calculated using the following expression.
P
Motor
= Motor Rated Power (kW)
■ 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
(1.0 - 1000.0)
This parameter is enabled when L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Accel Ramp)].
Automatic Adjustment of Parameters
Execute Inertia Tuning when A1-02 = 3 [Control Method Selection = Closed Loop Vector]. Parameters are
automatically adjusted.
Manual Parameter Input
The load inertia ratio is calculated using the following expression.
■ 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
parameter.
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.
50 ms
(0 - 5000 ms)
■ L3-35: Speed Agree Width for Auto Decel
No.
(Hex.)
Name Description
Default
(Range)
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)
V/f
CL-V/f
OLV
CLV
AOLV
V/f
CL-V/f
OLV
CLV
AOLV
V/f
CL-V/f
OLV
CLV
AOLV
V/f
CL-V/f
OLV
CLV
AOLV