Omron M1 Series User Manual page 402

8 Other Functions
Power Interruption Restart Wait Time (3008Hex-0EHex)
Set the time from after the occurrence of momentary power failure until the inverter restarts (Auto
Search Delay Time 2 for Starting Mode (3008Hex-2FHex) is used during auto search setting). If the
inverter is started in a state when the residual voltage of the motor is high, the inrush current may in-
crease, there may be a temporary regeneration, and an overvoltage alarm may occur. For safety, ad-
just Power Interruption Restart Wait Time (3008Hex-0EHex) so that restart is performed after the re-
sidual voltage becomes low to an extent.
Deceleration Setting During Current Limit for Restart Mode after
Power Interruption (3008Hex-0FHex)
During restart after a momentary power failure, if the output frequency of the inverter and the rotation
speed of the motor are not in sync, an overcurrent flows and current limitation is activated. If a current
limitation is detected, the output frequency is automatically lowered to be in sync with the motor rota-
tion speed. At Deceleration Setting During Current Limit for Restart Mode after Power Interruption
(3008Hex-0FHex), set the gradient (frequency fall rate (Hz/s)) for lowering the output frequency.
3008Hex-0FHex data
0.00
0.01 to 100.00 Hz/s
999
Continuous Running Voltage Level (3008Hex-10Hex)
• Deceleration stop during momentary power failure
If "Trip after decelerate-to-stop (Power Interruption Restart Mode Selection (3008Hex-0FHex) = 2)"
or "Decelerate-to-stop(w/o trip) (Deceleration Setting During Current Limit for Restart Mode after
Power Interruption (3008Hex-0FHex) = 6)" is selected at the Power Interruption Restart (mode se-
lection), then at the moment a momentary power failure occurs while the inverter is operating and
the Main Circuit DC Voltage of the inverter falls below the continuous running level, the deceleration
stop control is started.
Adjust the Main Circuit DC Voltage level at which to start the deceleration stop control at Continuous
Running Voltage Level (3008Hex-10Hex). During deceleration stop control, deceleration is per-
formed while controlling the Main Circuit DC Voltage at a constant level with a PI controller. The P
(Proportional) and I (Integral) of the PI controller are adjusted by Continuous Running at the Mo-
mentary Power Failure P Proportional Gain (3008Hex-5DHex) and Continuous Running at the Mo-
mentary Power Failure Integral Time (3008Hex-5EHex), respectively.
• Continuous running
8-48
Power supply system
400 V
Falls at the selected deceleration time.
Falls at the fall rate set at Deceleration Setting During Current Limit for Restart
Mode after Power Interruption (3008Hex-0FHex).
Falls in accordance with the PI controller of the current limitation process (the PI
constant is a fixed value inside the inverter).
Allowable voltage for restart after momentary pow-
Output frequency lowering operation
M1 Series EtherCAT Type User's Manual (I670)
er failure
100 V