Glossary
7344/7334Hardware User Manual G-4 ni.com
D
DAC Digital-to-Analog Converter
DC directcurrent
dedicated assigned to a particular function
DGND digital ground signal
digital I/O port ag roup of digital input/output signals
DIP dual inline package
DLL dynamic link library—provides the API for the motion control boards
drivers software that communicates commands to control a specificmotion control
board
DSP DigitalSignal Processor
E
encoder devicethat translates mechanical motion into electrical signals; used for
monitoring position or velocity in a closed-loop system
encoderresolution thenumber of encoder lines between consecutive encoder indexes (marker
orZ-bit). I f the encoder does not havean index output the encoder
resolution can be referred to aslines p errevolution.
F
f farad
FIFO First-In,First-Out
filtering atype of signal conditioning that filters unwanted signals from the signal
being measured
filterparame ters indicates the control loop parameter gains (PID gains) for a given axis
flash ROM at ype of electrically reprogrammable read-only memory