YASKAWA A1000 Series Technical Manual page 254

5.8 L: Protection Functions
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.
No.
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.
No.
L2-03
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.
No.
L2-04
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.
No.
L2-05
<1>
<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.
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.
No.
L2-06
<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.
■ 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.
L2-07
254
Name
Momentary Power Loss Ride-Thru Time
Name
Momentary Power Loss Minimum Baseblock Time
Name
Momentary Power Loss Voltage Recovery Ramp Time
Name
Undervoltage Detection Level
Name
KEB Deceleration Time
Name
KEB Acceleration Time
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting Range
Determined by C6-01 and
0.0 to 25.5 s
Setting Range
Determined by C6-01
0.1 to 5.0 s
Setting Range
Determined by C6-01 and
0.0 to 5.0 s
Setting Range
Determined by A1-02, C6-01,
150 to 210 Vdc
E1-01 and o2-04
Setting Range
0.00 to 6000.0 s
<1>
Setting Range
0.00 to 6000.0 s
<1>
Default
o2-04
Default
and o2-04
Default
o2-04
Default
<2>
Default
0.00 s
Default
0.00 s