Setting 0: Disabled
The regenerative torque limit and the output frequency are not adjusted. A regenerative load may trip the drive with an
overvoltage fault. Use this setting if dynamic braking options are installed.
Setting 1: Enabled
When the DC bus voltage rises due to regenerative load, an overvoltage fault is prevented by decreasing the regenerative
torque limit and increasing the output frequency.
n
L3-17: Target DC Bus Voltage for Overvoltage Suppression and Stall Prevention
Sets the target DC bus voltage level used by the overvoltage suppression function (L3-11 = 1), Intelligent Stall Prevention
during deceleration (L3-04 = 2).
No. Name Setting Range Default
L3-17
Target DC Bus Voltage for Overvoltage Suppression
and Stall Prevention
300 to 800 Vdc
<1>
740 Vdc
<1> <2>
<1> Values are specific to 400 V class drives. Multiply the values by 1.4375 for 575 V class drives. Multiply the values by 1.725 for 690 V class drives,
but set the value below 1040 Vdc (overvoltage protection level).
<2> This value is initialized when E1-01 is changed.
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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
u
L4: Speed Detection
These parameters set up the speed agree and speed detection functions that can be assigned to the multi-function output
terminals.
The speed is detected using the motor speed when A1-02 = 3 or 7.
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L4-01, L4-02: Speed Agreement Detection Level and Detection Width
Parameter L4-01 sets the detection level for the digital output functions Speed agree 1, User-set speed agree 1, Frequency
detection 1, and Frequency detection 2.
Parameter L4-02 sets the hysteresis level for these functions.
No. Name Setting Range Default
L4-01 Speed Agreement Detection Level 0.0 to 150.0 Hz 0.0 Hz
L4-02 Speed Agreement Detection Width 0.0 to 20.0 Hz
Determined by
A1-02
Refer to H2-01 to H2-03: Terminal M1-M2, P1-PC, and P2-PC Function Selection on page 105, Settings 2, 3, 4, and 5.
n
L4-03, L4-04: Speed Agreement Detection Level and Detection Width (+/-)
Parameter L4-03 sets the detection level for the digital output functions Speed agree 2, User-set speed agree 2, Frequency
detection 3, and Frequency detection 4.
Parameter L4-04 sets the hysteresis level for these functions.
No. Name Setting Range Default
L4-03 Speed Agreement Detection Level (+/-) -150.0 to 150.0 Hz 0.0 Hz
L4-04 Speed Agreement Detection Width (+/-) 0.0 to 20.0 Hz
Determined by
A1-02
Refer to H2-01 to H2-03: Terminal M1-M2, P1-PC, and P2-PC Function Selection on page 105, Settings 13, 14, 15, and
16.
1.8 L: Protection Functions
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
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Parameter Details
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