Rockwell Automation 20L, LPM20 PowerFlex 700 Active Converter Power Module - Manual (Page 31)

Start Up 2-13
PowerFlex 700L Active Converter Power Module User Manual
Publication PFLEX-UM002D-EN-P
Run On PwrUp
When Converter parameter 50 - [Start Config] is set to “1 = Run On
PwrUp,” the precharge bypass contactor is automatically closed and the
Converter is enabled shortly after power is turned on.
The precharge will close as soon as the DC Link voltage is above the
minimum required level and it has reached steady state. The precharge will
remain closed when there is a fault in the Converter. When the fault is reset,
the Converter will go back into run. In this configuration, the coolant
circulating loop must be enabled when the Converter is enabled, even if the
Inverter is not in run. The auxiliary contacts on the precharge bypass could
be used to enable the circulating pump.
This mode of operation is recommended for applications where the drive is
powered down when it is to be stopped for an extended period of time.
Manual Cntrl
When Converter parameter 50 - [Start Config] is set to “2 = Manual Cntrl,”
the operation of the precharge bypass contactor and enabling of the
Converter is controlled by two bits in Converter parameter 52 - [Manual
Control]. The bits are normally level sensitive. Turning the bits on closes the
bypass contactor and enables the Converter. Turning the bits off opens the
bypass contactor and disables the Converter.
The exception is that if there is a fault, the bypass contactor is not allowed to
close. After a fault, the fault must be reset, and then a rising edge on bit 1 in
parameter 52 - [Manual Control] is required to re-enable the Converter. The
value in parameter 52 is not retentive; it is reset to zero on power up.
When operating as a Coupled unit (DPI SLAVE), the Inverter is not allowed
to start with the precharge open and the Inverter will fault if it started with
the Converter stopped. When operating as a Stand Alone unit (DPI
MASTER), the value in parameter 52 - [Manual Control] may be written by
a datalink and the value in parameter 72 - [Converter Status] may be read
with a datalink and used as part of the interlocks with Inverters.
Start Inhibit
If the Converter does not start when expected, refer to Converter parameter
214 - [Start Inhibit] to display the Start Inhibit conditions.
Sequencing Precautions
When operating as a Coupled unit (DPI SLAVE) that is supplying power to
a single Inverter, the built-in interlocks will not allow the Inverter to start
unless the Converter is running, and the Converter will not stop when the
Inverter is running. However, when the Converter is operated as a Stand