Automatic Restart; Restarting Automatically After Momentary Power Loss - Omron VARISPEED E7 User Manual

Automatic Restart

This section explains functions for continuing or automatically restarting Inverter operation after a momentary
power loss.

Restarting Automatically After Momentary Power Loss

After a momentary power loss, the Inverter can be restarted automatically to continue motor operation.
To restart the Inverter after power is recovered, set L2-01 to 1 or 2.
If L2-01 is set to 1, the inverter will restart, when power is recovered within the time set in L2-02. If the power
loss time exceeds the time set in L2-02, an UV1 fault (DC bus undervoltage) will be detected.
If L2-01 is set to 2, the inverter will restart, when the main power supply is recovered as long as the control
power supply (i.e., power supply to the control circuit) is maintained. Consequently, alarm UV1 (DC bus und-
ervoltage) will not be detected. Nevertheless, UV alarm is displayed.
Related Parameters
Parameter
Number
L2-01
L2-02
L2-03
L2-04
L2-05
*1. The factory setting depends on the Inverter capacity. The value for a 200 V class Inverter of 0.4kW is given.
*2. Values for 200 V class Inverters are shown. For a 400 V class Inverter the values have to be doubled.
Setting Precautions
• Fault output signals are not output during momentary power loss recovery.
To continue Inverter operation after power has been restored, ensure that the RUN command stays ON
•
during the power loss
• L2-04 sets an acceleration time for the output voltage (from 0 V to normal voltage). After the power sup-
ply has returned the output voltage will be increased to the set value using the time set in L2-04.
• L2-05 sets the level at which UV is detected.
6-38
Name
Momentary power loss detection
Momentary power loss ridethru time
Min. baseblock (BB) time
Voltage recovery time
Undervoltage (UV) detection level
Change
Setting Factory
during
Range Setting
Operation
0 to 2 0 No
0.1 sec.
0 to 25.5 No
*1
0.1 sec.
0.1 to 5.0 No
*1
0.3 sec.
0.0 to
No
*1
5.0
150 to
190 VDC
210
No
*2
*2
Access
Level
A
A
A
A
A