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7344/7334 Hardware User Manual G-4 ni.com
D
DAC Digital-to-Analog Converter
DC direct current
dedicated assigned to a particular function
DGND digital ground signal
digital I/O port a group 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 tocontrol a specific motioncontrol
board
DSP Digital Signal Processor
E
encoder device that translates mechanical motion into electrical signals; used for
monitoring position or velocity in a closed-loop system
encoder resolution the number of encoder lines between consecutive encoder indexes (marker
or Z-bit). If the encoder does not have an index output the encoder
resolution can be referred to as lines per revolution.
F
f farad
FIFO First-In, First-Out
filtering a type of signal conditioning that filters unwanted signals from the signal
being measured
filter parameters indicates the control loop parameter gains (PID gains) for a given axis
flash ROM a type of electrically reprogrammable read-only memory