Glossary – National Instruments NI-Motion User Manual
Page 289
© National Instruments Corporation
G-1
Glossary
A
A/D
analog-to-digital
absolute mode
Treat the target position loaded as position relative to zero (0) while making
a move.
absolute position
Position relative to zero.
acceleration/
deceleration
Measurement of the change in velocity as a function of time. Acceleration
and deceleration describes the period when velocity is changing from one
value to another.
active high
Signal is active when its value is high (1).
active low
Signal is active when its value is low (0).
ADC
analog-to-digital converter
address
Character code that identifies a specific location, or series of locations,
in memory or on a host PC bus system.
amplifier
Drive that delivers power to operate the motor in response to control
signals. In general, the amplifier is designed to operate with a particular
motor type. For example, you cannot use a stepper drive to operate a
DC brush motor.
API
application programming interface
axis
Unit that controls a motor or any similar motion or control device.
B
b
bit—One binary digit, either 0 or 1.
base address
Memory address that serves as the starting address for programmable or
I/O bus registers. All other addresses are located by adding to the base
address.