Rockwell Automation 20L, LPM20 PowerFlex 700 Active Converter Power Module - Manual (Page 30)

2-12 Start Up
PowerFlex 700L Active Converter Power Module User Manual
Publication PFLEX-UM002D-EN-P
Converter Sequencing The condition when to start and stop the Converter must be configured in
parameter 50 - [Start Config]. There are three ways to operate the
Converter: Run On Start, Run On Power Up, and Manual Control. This also
configures how the precharge bypass contactor operates.
Run On Start
When Converter parameter 50 - [Start Config] is set to “0 = Run On Start,”
the operation changes when the Converter is set as a Coupled unit (DPI
SLAVE) or a Stand Alone unit (DPI MASTER) using SW1 (
Figure 1.3 ).
Coupled Unit (DPI SLAVE Setting)
When set as a Coupled unit (DPI SLAVE) and Run on Start is selected, then
starting and stopping the Converter is coordinated with starting and
stopping the Inverter. When the Inverter is started or jogged, the Converter
is enabled to turn on. When the Inverter is stopped or jog is released, the
Converter is stopped.
Stand Alone Unit (DPI MASTER Setting)
When set as a Stand Alone unit (DPI MASTER) and Run on Start is
selected, then the Converter may be started and stopped from the buttons on
a HIM, or by the Logic Command bits transmitted by a 20-COMM-x
adapter or 1203-USB or 1203-SSS device. The logic masks determine
which DPI ports are allowed to take control.
Precharge Bypass Operation
In Run On Start, the precharge can be configured to operate in one of two
ways as selected by parameter 51 - [Option Select], Bit 7 (Precharge
Control). By default, this option bit is turned off so the precharge bypass
contactor will be commanded to close at the time the Converter is
commanded to start, and the bypass contactor opens after the Converter is
commanded to stop. If the option bit is set, then the bypass contactor is
closed at power up after the DC bus is at steady state.
If there is a fault in the Converter, the precharge bypass contactor will open.
If the option bit is set, the bypass contactor is closed when the fault is reset.
The option bit also selects how long the Converter continues to run after it is
commanded to stop. If the option bit is turned off, then parameter 53 - [Turn
Off Delay] selects the time delay between the stop command and the time
when the converter is stopped and the bypass is opened. If the option bit is
turned on, then the Converter stops without a delay.
As a Coupled unit (DPI SLAVE), Run On Start with the precharge option
bit turned off is recommended for applications where the drive is left
powered up but the drive is not run for extended periods of time. With the
precharge bypass contactor open, the fan cooling the input reactor is turned
off.