Glossary
© National Instruments Corporation Glossary-9 VXI-MXI-Express Series User Manual
V
Vvolts
VIC VXI Interactive Control program, a part of the NI-VXI bus interface
software. Used to program VXI devices and develop and debug VXI
application programs.
VISA Virtual Instrument Software Architecture. This is the general name given
to VISA and its associated architecture.
VISAIC VISA Interactive Control program, a part of the NI-VISA software.
Usedto program devices and develop and debug application programs.
VITA VMEbus International Trade Association
VME Versa Module Eurocard or IEEE 1014
VMEbus System
Controller
A device configured for installation in Slot 0 or a VXIbus mainframe or the
first slot in a VMEbus chassis. This device is unique in the VMEbus system
in that it performs the VMEbus System Controller functions, including
clock sourcing and arbitration for data transfers across the backplane.
Installing such a device into any other slot can damage the device, the
VMEbus/VXIbus backplane, or both.
VXIbus VMEbus Extensions for Instrumentation
W
W watts
Word Serial Protocol The simplest required communication protocol supported by
message-based devices in a VXIbus system. It utilizes the A16
communication registers to transfer data using a simple polling handshake
method.
write posting A mechanism that signifies that a device will immediately give a successful
acknowledge to a write transfer and place the transfer in a local buffer. The
device can then independently complete the write cycle to the destination.