YASKAWA iQpump Micro CIMR-PW Series User Manual page 194

5.8 L: Protection Functions
No.
L2-01
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. This setting should also be used if the KEB function is utilized.
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 Ride-Thru Time
n
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
n
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
L2-04: Momentary Power Loss Voltage Recovery Ramp Time
n
Sets the time constant used to ramp up the voltage during Speed Search. The setting value determines the time for a change
from zero to the maximum voltage.
No.
L2-04 Momentary Power Loss Voltage Recovery Ramp Time
L2-05: Undervoltage Detection Level
n
Determines the voltage at which a Uv1 fault is triggered or at which the KEB function is activated.
No.
<1>
L2-05
<1> Values are for 200 V class drives and must be doubled for 400 V class drives.
<2> This value is initialized when E1-01 is changed.
This setting rarely needs to be changed.
When setting L2-05 is lower than the default setting, be sure to install an AC reactor option to the input side of the power
supply to prevent damage to drive circuitry.
194
Name
Momentary Power Loss Operation Selection
Name
Momentary Power Loss Ride-Thru Time
Name
Name
Name
Undervoltage Detection Level
Setting Range
Setting Range
0.0 to 25.5 s
Setting Range
0.1 to 5.0 s
Setting Range
0.0 to 5.0 s
Setting Range
150 to 210 V
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
Default
0 to 2
Default
Determined by
o2-04.
Default
Determined by
o2-04
Default
Determined by
o2-04
Default
190 V
0
<2>