YASKAWA A1000 Series Technical Manual

5.8 L: Protection Functions
254 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
■ L2-02: Momentary Power Loss Ride-Thru Time
Sets the maximum time allowed to ride through a power loss. If power loss operation exceeds this time, the drive will
attempt to accelerate back to frequency reference. This parameter is valid if L2-01 = 1 or 3.
Note: 1. The amount of time the drive is capable of recovering after a power loss is determined by the capacity of the drive. Drive capacity
determines the upper limit for L2-02.
■ L2-03: Momentary Power Loss Minimum Baseblock Time
Sets the minimum baseblock time when power is restored following a momentary power loss. This determines the time
the drive waits for the residual voltage in the motor to dissipate. Increase this setting if overcurrent or overvoltage occurs
at the beginning of Speed Search, after a power loss, or during DC Injection Braking.
■
L2-04: Momentary Power Loss Voltage Recovery Ramp Time
Sets the time for the drive to restore the output voltage to the level specified by the V/f pattern after Speed Search. The
setting value determines the time for the voltage to go from 0 V to the maximum voltage.
■
L2-05: Undervoltage Detection Level (Uv)
Determines the voltage at which a Uv1 fault is triggered or at which the KEB function is activated. This setting rarely
needs to be changed.
Note: 1. When setting L2-05 below the default value, an AC reactor option should be installed to the input side of the power supply to prevent
damage to drive circuitry.
2. If using KEB Ride-Thru and L2-05 is set too low, then undervoltage in the DC bus (uv1) will be triggered before KEB Ride-Thru can
be executed. Take caution not to set this value too low.
■ L2-06: KEB Deceleration Time
Sets the time to decelerate from the frequency reference at the time KEB Ride-Thru was initiated down to zero speed.
This setting can be used for System KEB Ride-Thru only.
■
L2-07: KEB Acceleration Time
Sets the time to reaccelerate from the speed when KEB was deactivated to the frequency reference.
When set to 0.0 s, the drive will accelerate back up to speed according to the active deceleration time set by C1-01, C1-
03, C1-05, or C1-07.
No. Name Setting Range Default
L2-02 Momentary Power Loss Ride-Thru Time 0.0 to 25.5 s
Determined by C6-01 and
o2-04
No. Name Setting Range Default
L2-03 Momentary Power Loss Minimum Baseblock Time 0.1 to 5.0 s
Determined by C6-01
and o2-04
No. Name Setting Range Default
L2-04 Momentary Power Loss Voltage Recovery Ramp Time 0.0 to 5.0 s
Determined by C6-01 and
o2-04
No.
<1> Values are for 200 V class drives and must be doubled for 400 V class drives.
<2> The default setting for 400 V class drives will vary depending on if the drive input voltage is over or under 400 V.
Name Setting Range Default
L2-05 <1> Undervoltage Detection Level 150 to 210 Vdc
Determined by A1-02, C6-01,
E1-01 and o2-04
<2>
No.
<1> Setting range is determined by the accel/decel time units set in C1-10. If the time is set in units of 0.01 s (C1-10 = 0), the setting range
becomes 0.00 to 600.00 s.
Name Setting Range Default
L2-06 KEB Deceleration Time 0.00 to 6000.0 s <1> 0.00 s
No. Name Setting Range Default
L2-07 KEB Acceleration Time 0.00 to 6000.0 s <1> 0.00 s

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)