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Chapter 2 Introduction to the NI-VXI Functions
NI-VXI User Manual 2-6 © National Instruments Corporation
cable connected towards the root frame) in the frame acts as a
remote controller. An embedded or external controller may use a
remote controller to control the remote mainframe.
•
External controller—A desktop computer or workstation connected
to the VXI/VME system via a MXI interface board. An example is
a standard personal computer with a PCI-MXI-2 installed.
In general, a multiple mainframe VXI/VME system will have one of
the following controller configurations:
•
An embedded controller in one frame that is connected to other
frames via mainframe extenders using MXI-2. VXI-MXI-2 or
VME-MXI-2 boards in the other frames can also be used as remote
controllers. See Figure 2-1.
bus
NATIONAL
INSTRUMENTS
®
NATIONAL
INSTRUMENTS
®
bus
Embedded Controller
Extender and Remote Controller
Extender Only
bus
NATIONAL
INSTRUMENTS
®
Figure 2-1. An Embedded Controller Connected to Other Frames via
Mainframe Extenders Using MXI-2
•
An external controller connected using MXI-2 to a number of
remote controllers, each in a separate frame. The external controller
can use the remote controllers for control of the VXI/VME system,
or it can use its own controller capabilities. See Figure 2-2.