Oracle Vacuum Cleaner CPU-56T User Manual

Board Damage
Installing the board into a powered system may damage this and other boards in the
system.

Only install the board into a non−powered system.

If the CPU board is plugged into slot 1 and configured accordingly with switch SW4 (refer
to
Switch Settings" table), the board acts as IACK daisy−chain driver. Plugged in any
other slot, the board closes the IACKIN−IACKOUT path.

a

If one board is missing in this daisy chain, an active backplane will be able to
automatically transfer the signals to the next board in the chain. If the board is not
plugged into an active backplane, jumpers on the backplane will transmit the signals. The
jumpers have to be set manually.

Start

1.

Remove jumpers connecting BG3IN# and BG3OUT# signals from empty slot
on backplane where the CPU board is to be plugged into backplane

a

2.

Assemble jumpers for BG3IN# and BG3OUT# signals on lower and higher
slots on backplane where no board is plugged to ensure that daisy chain is not
interrupted

Finish

If configured accordingly, the CPU board recognizes automatically whether it is plugged
into slot 1 of the VMEbus backplane or in any other slot. This auto−configuration feature
requires SW4−2 to be set to the OFF position. The VMEbus system controller is enabled
via auto−configuration if the CPU board is plugged into slot 1. Otherwise, it is disabled.

Damage of the Board or Other VMEbus Participants
If more than one system controller is active in the VMEbus system, the board or other
VMEbus participants can be damaged.

Therefore, always ensure that only one CPU board is configured to be system controller
in the VMEbus system.