Continuing Operation; Restarting Automatically After Power Is Restored - YASKAWA FSDrive-MV1S Instructions Manual

Super energy-saving medium-voltage inverter

Table of Contents

Continuing Operation

This section explains functions for continuing or automatically restarting Inverter operation using speed

search even if an error occurs.

Restarting Automatically After Power Is Restored

Even if a temporary power loss occurs, you can restart the Inverter automatically after power is restored to

continue motor operation. To restart the Inverter after power has been restored, set L2-01 to 1.

If L2-01 is set to 1, when power is restored within the time set in L2-02, the Inverter will restart. If the time set

in L2-02 is exceeded, alarm IUV (main circuit undervoltage) will be detected.

Related Constants

Name

Constant

Number

Display

Momentary power loss

detection

L2-01

PwrL Selection

Momentary power loss

ridethru time

L2-02

PwrL Ridethru t

Min. baseblock time

L2-03

PwrL Baseblock t

Voltage recovery time

L2-04

PwrL V/F Ramp t

* The factory setting depends on the Inverter capacity.

Setting

Description

Range

0: Disabled [main circuit

undervoltage (IUV)

detection]

1: Enabled [Restarted when

the power returns within the

time for L2-02. When L2-

0 or 1

02 is exceeded, main circuit

undervoltage (IUV) is

detected.]

A backup of the control power

supply is necessary for tempo-

rary power loss protection.

Ridethrough time, when

Momentary Power Loss Selec-

0.0 to

tion (L2-01) is set to 1, in units

of seconds.

Sets the Inverter's minimum

baseblock time in units of one

second, when the Inverter is

restarted after power loss ride-

through.

Sets the time to approximately

0.1 to

0.7 times the motor secondary

circuit time constant.

When an overcurrent or over-

voltage occurs when starting a

speed search or DC injection

braking, increase the set values.

Sets the time required to return

the Inverter output voltage to

normal voltage at the comple-

tion of a speed search, in units

0.0 to

of one second.

Sets the time required to

recover from 0 V to the maxi-

mum voltage.

Change

Factory

during

Open-

Setting

Operation

loop

Vector

2.0 s

10.0

2.0 s

5.0

1.5 s

10.0