YASKAWA P1000, Technical Manual

Page: 252 / 594

No. Name Setting Range Default
L3-23 Automatic Reduction Selection for Stall Prevention During Run 0, 1 0
Setting 0: Disabled
The level set in L3-06 is used throughout the entire speed range.
Setting 1: Enabled
The Stall Prevention level during run is reduced in the constant power range. The lower limit will be 40% of L3-06.
n L3-24: Motor Acceleration Time for Inertia Calculations
Sets the time to accelerate the motor from stop to the maximum speed at motor rated torque. Set this parameter when using
Single Drive KEB 2 (L2-29 = 1), Intelligent Stall Prevention during Deceleration (L3-04 = 2), or the Overvoltage Suppression
function (L3-11 = 1).
No. Name Setting Range Default
L3-24 Motor Acceleration Time for Inertia Calculations 0.001 to 10.000 s Determined by o2-04 <1>
<1> Parameter L3-24 is defaulted for a Yaskawa standard 4-pole motor. During Auto-Tuning, L3-24 will be initialized to a Yaskawa standard 4-pole
motor if parameter E2-11 is changed.
Manual Parameter Setup
Make the calculations in the formula below:
L3-24 =
2 J [kgm
2
] n [r/min]
60 T [Nm]
rated
rated
Calculate the rated torque in the formula below:
60 P [kW] 10 3
2 n [r/min]
T [Nm] =
Motor
rated
rated
n L3-25: Load Inertia Ratio
Determines the ratio between the rotor inertia and the load. Set this parameter when using Single Drive KEB 2 (L2-29 = 1),
Intelligent Stall Prevention during deceleration (L3-04 = 2), or the overvoltage suppression function (L3-11 = 1).
No. Name Setting Range Default
L3-25 Load Inertia Ratio 1.0 to 1000.0 1.0
When set incorrectly, a fairly large current ripple can result during Single Drive KEB 2 (L2-29 = 1). This may cause overvoltage
suppression (L3-11 = 1) or other faults such as ov, Uv1, and oC.
Manual Parameter Setup
Calculate parameter L3-25 in the formula below:
L3-25 =
Machine Inertia
Motor Inertia
n
L3-26: Additional DC Bus Capacitors
Sets the capacity of any additionally installed DC bus capacitors. This data is used in calculations for Single Drive KEB Ride-
Thru 2. Adjust this setting only if external capacity is connected to the DC bus and Single Drive KEB 2 is used.
No. Name Setting Range Default
L3-26 Additional DC Bus Capacitors 0 to 65000 μF 0 μF
n
L3-27: Stall Prevention Detection Time
Sets a delay time from when the Stall Prevention level is reached and the actual Stall Prevention function is activated.
No. Name Setting Range Default
L3-27 Stall Prevention Detection Time 0 to 5000 ms 50 ms
5.8 L: Protection Functions
252 YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual