Glossary
7344/7334Hardware User Manual G-6 ni.com
I/O input/output—thetransfer of data to and from a computer system involving
communications channels, operatorinterface devices, and/or motion
controli nterfaces
inverting the polarity of a switch (limit switch, home switch, and so on) in active
state.If these switches are active-low they are said to have inverting
polarity.
IRQ interrupt request
K
kkilo—the standard metric prefixfo r 1,000, or 103, used with units of
measure such as volts,hertz ,and m eters
Kkilo—the prefixfor 1,024, or 210,used with B in quan tifying data or
computermemory
L
LIFO Last-In,First-Out
limit
switch/end-of-travel
position(input)
sensorsthat alert the control electronics that physical end of travel is being
approached and that the motion should stop
M
m meters
MCS Move Complete Status
microstep The proportional control of energy in the coils of a Stepper Motor that
allowthe motor to move to or stop at locations other than the fixed
magnetic/mechanical pole positions determined by the motor
specifications.This capability facilitates the subdivision of full mechanical
stepson a stepper motor into finer microstep locations that greatly smooth
motorr unning operation and increase the resolution or number of discrete
positions that a stepper motor can attain in each revolution.