YASKAWA V1000 Technical Manual page 359

No. Name
Stall Prevention Selection
L3-01
during Acceleration
L3-02 Stall Prevention Level
during Acceleration
Stall Prevention Limit
L3-03
during Acceleration
Stall Prevention Selection
L3-04
during Deceleration
Stall Prevention Selection
L3-05
during Run
Stall Prevention Level
L3-06
during Run
ov Suppression Function
L3-11
Selection
Overvoltage Suppression
L3-17
and Stall Prevention Desired
<5>
DC Bus Voltage
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Description
Selects the Stall Prevention method used to prevent
excessive current during acceleration.
0: Disabled - Motor accelerates at active acceleration rate.
The motor may stall if load is too heavy or accel time is too
short.
1: General Purpose - When output current exceeds L3-02
level, acceleration stops. Acceleration will continue when
the output current level falls below the L3-02 level.
2: Intelligent - The active acceleration rate is ignored.
Acceleration is completed in the shortest amount of time
without exceeding the current value set in L3-02.
Used when L3-01 = 1 or 2.
100% is equal to the drive rated current.
Decrease the set value if stalling or excessive current occurs
with default setting.
Sets Stall Prevention lower limit during acceleration when
operating in the constant power range. Set as a percentage
of the drive's rated current.
When using a braking resistor, use setting "0". Setting "3" is
used in specific applications.
0: Disabled - The drive decelerates at the active deceleration
rate. If the load is too large or the deceleration time is too
short, an ov fault may occur.
1: General Purpose - The drive decelerates at the active
deceleration rate, but if the main circuit DC bus voltage
reaches the Stall Prevention level, deceleration will stop.
Deceleration will continue once the DC bus level drops
below the Stall Prevention level.
2: Intelligent - The active deceleration rate is ignored and the
drive decelerates as fast as possible without hitting ov fault
level. Range: C1-02 / 10.
3: Stall Prevention with Braking Resistor - Stall Prevention
during deceleration is enabled in coordination with dynamic
braking.
4: Overexcitation Deceleration - Decelerates with the flux
level determined by n3-13 (Overexcitation Gain).
7: Overexcitation Deceleration 3 - Applies more braking
power than normal overexcitation deceleration. Yaskawa
recommends extra caution due to the heavy load on the
motor.
Selects the Stall Prevention method to use to prevent drive
faults during run.
0: Disabled - Drive runs a set frequency. A heavy load may
cause the drive to trip on an oC or oL fault.
1: Decel Time 1 - The drive will decelerate at Decel Time 1
(C1-02) if the output current exceeds the level set by L3-06.
Once the current level drops below the L3-06 level, the drive
will accelerate back to its frequency reference at the active
acceleration rate.
2: Decel Time 2 - Same as setting 1 except the drive
decelerates at Decel Time 2 (C1-04).
When output frequency is 6 Hz or less, Stall Prevention
during run is disabled regardless of the setting in L3-05.
Enabled when L3-05 is set to "1" or "2". 100% is equal to
the drive rated current.
Decrease the set value if stalling or excessive current occurs
with the default settings.
Enables or disables ov suppression function, which allows
the drive to change the output frequency as the load changes,
thus preventing an ov fault.
0: Disabled
1: Enabled
Note: The frequency reference and motor speed diverge as
the regenerative energy begins to flow back into the DC bus
and triggers the ov suppression function. Disable this
function when using a braking resistor.
Sets the desired value for the DC bus voltage during
overvoltage suppression and Stall Prevention during
deceleration. Enabled only when L3-04 = 2 or L3-11 = 1.
B.2 Parameter Table
Control
Mode
Range Def.
O
V/ P
L
f M
V
0 to 2
1 A A A
<7>
<8>
0 to 150
A A A
<18>
<18>
0 to 100 50% A A A
0 to 4; 7
1 S S S
<9>
0 to 2 1 A − A
<8>
30 to 150
A − A
<18>
<18>
0, 1 0 A A A
370 V
150 to
A A A
<6>
400 V
Addr.
Pg.
Hex
48F 211
490 212
491 212
492 213
493 214
494 214
4C7 215
B
462 215
359