Rockwell Automation SB3000 Configuration and Programming - Manual (Page 35)

Configuring the UDC Module’s Registers 3-17
3.4 Command Registers (Registers 100-199/1100-1199)
The Command Registers view is used to configure command registers. These
registers are used for command data sent to the PMI by the UDC module at the end of
every scan of the UDC Processor. Note that the bits in these registers (except bit 15 in
register 100/1100) are used to command action only and do not indicate the status of
the action commanded. The feedback registers (registers 200/1200 to 299/1299) are
provided for this purpose. The status of the command registers is not retained after a
Stop All.The status of the command registers is not retained after a Stop All.
Drive Control Register 100/1100
The Drive Control Register contains the bits that control the operation of the SB3000 Synchronous Rectifier.
The SB3000 Rectifier can operate in one of three modes: idle, voltage loop run, or bridge test. The default
operating mode is idle. The other two modes are selected using this register. (See Appendices F and G for
detailed information on the voltage loop run and bridge test modes.)
All bits in this register (except bit 15) can only be written to by a task on an AutoMax Processor. They cannot
be written to by a task on a UDC module. All read/write bits in this register are edge-sensitive and must be
maintained to assert the command.
Voltage Loop Run Bit 0
The Voltage Loop Run bit is set by the
application task to enable the voltage loop in
the PMI Processor. See F for more
information. Hex Value: 0001H
Sug. Var. Name: VDC_RUN@
Access: Read/Write
UDC Error Code: N/A
LED: N/A
!
ATTENTION: The pre-charge contactor for the SB3000 must be closed
and the voltage loop must be on (register 200/1200, bit 0) before any
load inverters can be put into run. If the SB3000 pre-charge contactor is
not closed, running a load inverter will burn up the pre-charge resistors.
Failure to observe this precaution could result in damage to, or
destruction of, the equipment.
Bridge Test Enable Bit 2
The Bridge Test Enable bit is set to close
the pre-charge contactor and enable the
bridge test procedure. Hex Value: 0004H
Sug. Var. Name: BRG_TST@
Access: Read/Write
UDC Error Code: N/A
LED: N/A
The bridge test turns on individual or sets of power devices in a power module in
order to verify the gate cable connections and power device operation. The value in
the Bridge Test Code register (105/1105) is used to select which power devices to
turn on. Refer to G for further information on performing the bridge test.
Note that this test is normally performed at the factory and should not have to be
performed again unless the power devices are replaced.