4.5 RUN COMMAND SELECTION
This section explains the two run command modes of the power regenerative unit.
Select the mode according to the application.
(1) Auto Run
Auto run is the mode in which the power regenerative unit detects any increase/
decrease of the bus voltage and performs an auto run/stop if the terminal S2-SC
is “closed.”
When the DC voltage is less than the acceptable voltage set at the auto run/stop
level, the motor stops after the preset time that was set at C8-20 has passed (de-
fault: 1sec).
AUTO RUN
ON
Inverter Status
Auto Run
Regeneration
DC Bus Voltage
Regenerative Unit
Run Status
Current at Power Side
RUN
AC Power Supply Voltage × 1.35
Operation Start Level
Operation Stop Level
STOP
C8-20: default setting 1 sec
Fig.17 Timechart of the Auto Run Mode
If the motor vibrates when in AUTO RUN mode, change the mode to MANUAL
RUN.
4 OPERATION
39
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