Rockwell Automation SB3000 Configuration and Programming - Manual (Page 108)

E-4 SB3000 Drive Configuration and Programming
Figure E.2 – Pre-Charge Sequencing State Diagram
Control Power On
Pre-charge Contactor is Open
Pre-charge contactor is closed
Report fault (FLT_CHG)
Wait for Pre-charge to Close
Pre-charge times out
Report fault (FLT_CHG)
Pre-charge is closed
& Vdc > Vdiode
Pre-charge Closed - RUN Pre-charge Closed - TEST
Pre-charge opens
Report fault (FLT_CHG)
Wait to Open
Vdc < Power Loss Threshold
Disable gate
Report fault (FLT_CHG)
Command pre-charge
to open
Pre-charge does not open
Report fault (FLT_CHG)
No charge faults & Vdc > Vdiode
or
Test mode active & Vdc < 5V
Command pre-charge to close
Pre-charge is closed
& Vdc < 5V
& in test mode
Pre-charge opens
Report fault (FLT_CHG)
Bridge test command is set false
Command pre-charge to open
Pre-charge does not open
Report fault (FLT_CHG)