L2: Momentary Power Loss Ride-Thru - YASKAWA T1000V Technical Manual

■ L1-13: Continuous Electrothermal Operation Selection
Determines whether or not to hold the current value of the electrothermal motor protection (L1-01) when the power
supply is interrupted.
No.
L1-13 Continuous Electrothermal Operation Selection
Setting 0: Disabled
Setting 1: Enabled

◆ L2: Momentary Power Loss Ride-Thru

L2-01: Momentary Power Loss Operation Selection
■
When a momentary power loss occurs (DC bus voltage falls below the level set in L2-05), the drive can be set to
automatically return to the operation it was performing when the power went out based on certain conditions.
No.
L2-01 Momentary Power Loss Operation Selection
Setting 0: Disabled (default)
If power is not restored within 15 ms, a Uv1 fault will result and the drive will stop the motor.
Setting 1: Enabled, Recover Within L2-02
When a momentary power loss occurs, the drive will attempt to restart and perform Speed Search if power is restored
within the period of time set to parameter L2-02. If power is not restored within the time set to L2-02 (i.e. DC bus voltage
level remains below Uv1 detection level L2-05), then a Uv1 fault is triggered and the drive output will be shut off.
Setting 2: Recover as Long as CPU has Power
Drive will try to restart as long as the CPU still has power. This allows for a longer ride-through time than setting L2-01
to 1. A Uv1 fault is not triggered.
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.
2. When L2-01 is set to 1 or 2, and a magnetic contactor between motor and drive is used, be sure that the magnetic contactor is kept
close as long as the drive attempts to restart.
3. When L2-01 is set to 1 or 2, "Uv" will flash on the operator while the drive is attempting to recover from a momentary power loss. A
fault signal is not output at this time.
■ L2-02: Momentary Power Loss Time Ride-Thru
Set the time in which the power has to return before a Uv fault is tripped. This parameter is valid only if L2-01 = 1.
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 it
takes for the leftover voltage in the motor to dissipate. Increase this setting if overcurrent or overvoltage occur at the
beginning of Speed Search after a power loss or DC Injection Braking. If L2-03 > L2-02, then the drive will restart after
the time set to L2-03 has passed from the beginning of the power loss.
No.
L2-03 Momentary Power Loss Minimum Baseblock Time
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Name
Name
Name
Momentary Power Loss Time Ride-Thru
Name
5.8 L: Protection Functions
Setting Range
0 or 1
Setting Range
0 to 2
Setting Range
Determined by
0.0 to 25.5 s
Setting Range
Determined by
0.1 to 5.0 s
o2-04 and C6-01
Default
1
Default
0
Default
5
o2-04
Default
189