YASKAWA Z1000U Series Programming Manual page 110

1.8 L: Protection Functions
Setting 2: Recover as long as CPU Has Power
When a momentary power loss occurs, the drive output will be shut off. If the power returns and the drive control circuit has
power, the drive will attempt to perform Speed Search and resume the operation. This will not trigger an Fdv fault.
Notes on Settings 1 and 2:
• "Uv" flashes on the operator while the drive attempts to recover from a momentary power loss. A fault signal is not output
at this time.
• When using a magnetic contactor between the motor and the drive, keep the magnetic contactor closed while the drive
attempts to restart with Speed Search.
n 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 the frequency reference. This parameter is valid when L2-01 = 1.
Note: 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
n 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 Momentary Power Loss Minimum Baseblock Time
n 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 Momentary Power Loss Voltage Recovery Ramp Time
n L2-07: Momentary Power Loss Voltage Recovery Acceleration Time
Sets the time to reaccelerate from the deceleration frequency to the frequency set in frequency reference (frequency before
before power loss) after momentary power loss.
When set to 0.0 s, the drive will accelerate to speed according to the active acceleration time set by C1-01, C1-03, C1-05, or
C1-07.
No.
L2-07 Momentary Power Loss Voltage Recovery Acceleration Time
<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.
n
L2-13: Input Power Frequency Fault Detection Gain
Sets the gain used to detect a power supply frequency fault (Fdv). If an Fdv fault occurs with no momentary power loss, reduce
the setting value in 0.1 increments.
No.
L2-13
n L2-21: Low Input Voltage Detection Level
Sets the low input voltage detection level.
No.
L2-21
<1> Values are specific to 200 V class drives. Double the value for 400 V class drives.
110
Name
Momentary Power Loss Ride-Thru Time
Name
Name
Name
Name
Input Power Frequency Fault Detection Gain
Name
Low Input Voltage Detection Level
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
Setting Range
0.0 to 2.5 s
Setting Range
0.1 to 5.0 s Determined by o2-04
Setting Range
0.0 to 5.0 s Determined by o2-04
Setting Range
<1>
0.00 to 6000.0 s
Setting Range
0.1 to 2.0
Setting Range
<1>
100 to 230 V
Default
0.5 s
Default
Default
Default
0.00 s
Default
1.0
Default
<1>
150 V