© National Instruments Corporation G-1 NI-Motion User Manual
GlossaryA
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.