YASKAWA T1000V Technical Manual page 345

No. Name
Stall Prevention Selection
L3-04
during Deceleration
Stall Prevention Selection
L3-05
during Run
L3-06 Stall Prevention Level
during Run
<15>
L3-10 Stall Prevention Level
during Deceleration
<15>
Overvoltage Suppression
L3-11
Function Selection
Target DC Bus Voltage for
L3-17
Overvoltage Suppression
<15> <17>
and Stall Prevention
Deceleration Time at Stall
L3-22
Prevention during
<15>
Acceleration
Automatic Reduction
L3-23 Selection for Stall
Prevention during Run
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Description
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.
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).
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.
Sets the level of Stall Prevention during deceleration as a
percentage of the overvoltage level.
If the DC bus voltage rises above the level set in L3-10
during deceleration, the drive will stop.
Disabled if L3-04 is set to 2.
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.
Sets the deceleration time used for Stall Prevention during
acceleration in Open Loop Vector Control for PM motors.
When set to 0, the drive decelerates at the normal
deceleration time.
0: Sets the Stall Prevention level throughout the entire
frequency range to the value in parameter L3-06.
1: Automatically lowers the Stall Prevention level in the
constant output range. The lower limit value is 40% of L3-
06.
B.3 Parameter Table
Control
Mode
Range Def.
V/f OL P
V M
0 to 4
1 S S S
<27>
0 to 2 1 A − A
30 to 150
A − A
<6>
<6>
92%
80 to 95 A A A
<8>
0, 1 0 A A A
150 to 400 370 V
A A A
V
<8>
0.0 to
0.0 s − − A
6000.0
A A Α
0, 1 0
Addr.
Pg.
Hex
492 192
493 193
494 194
498 194
4C7 194
462 195
4F9 192
B
4FD 194
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