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O
open-loop
P
PCI
PID
PIVff
port
position breakpoint
power cycling
PWM
PXI
Q
quadrature counts
R
RAM
relative breakpoint
© National Instruments Corporation
refers to a motion control system where no external sensors (feedback
devices) are used to provide position or velocity correction signals
Peripheral Component Interconnect—a high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA. It is
achieving widespread acceptance as a standard for PCs and workstations;
it offers a theoretical maximum transfer rate of 132 MB/s.
proportional-integral-derivative control loop
proportional-integral-velocity feed forward
(1) a communications connection on a computer or a remote controller;
(2) a digital port, which consists of eight lines of digital input and/or output
position breakpoint for an encoder can be set in absolute or relative
quadrature counts. When the encoder reaches a position breakpoint,
the associated breakpoint output immediately transitions.
turning the host computer off and then back on, which causes a reset of
the motion control board
Pulse Width Modulation—a method of controlling the average current in
a motor phase winding by varying the on-time (duty cycle) of transistor
switches
PCI eXtensions for Instrumentation
encoder line resolution times four
random-access memory
sets the position breakpoint for an encoder in relative quadrature counts
G-7
Glossary
NI 7340 User Manual
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