Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual User Manual
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Step 3.
Precharging
In this step, you will turn the RUN sequence control signal ON.
When the RUN sequence signal is enabled, the 8720MC-RPS
Regenerative Power Supply will start precharge operation. When
precharge operation is completed, the main magnetic contactor will
be turned ON and the PWM switching will begin.
Step 3.1
Turn the RUN sequence signal ON.
The precharge operation starts.
When the precharge operation is
completed, the main magnetic
contactor is turned ON and the
PWM switching starts. When
the precharge operation is
finished, the DC bus voltage
goes up to the reference value.
This displays the input current
is 5 Amps.
Step 4.
Verifying DC Bus Voltage
When PWM switching begins and controlling the DC bus voltage
starts, the DC bus voltage will be maintained at the reference value
(U.000). Then, you will verify that the DC bus voltage value is
same as the reference value.
Step 4.1
Press the
key.
The display shows AC input
power voltage, with the "V"
status LED turned ON. This
display indicates that the input
power voltage is 412 V.
Step 4.2
Press the
key.
The display indicates the DC
bus voltage and the "V" status
LED turns ON. This display
shows that the DC bus voltage
is 748 V.
5-6
Start and Adjustment
RST PRG ENT
READY
READY
FAULT
FAULT
PROGRAM
PROGRAM
kW
kW
V
A
RST PRG ENT
READY
READY
FAULT
FAULT
PROGRAM
PROGRAM
kW
kW
V
A
RST PRG ENT
READY
READY
FAULT
FAULT
PROGRAM
PROGRAM
kW
kW
V
A