tmnxBsxAarpCommandControl allows the initiation of commands
against an AARP instance.
When read, this object returns the last command written
to the object or 'noCmd(0)' if no command has been written
to the object since initialization. The last command
written may have already completed.
When a valid command is written to tmnxBsxAarpCommandControl,
the AARP instance performs the command.