Glossary
cFP-21xx and cFP-BP-x User Manual
G-2
ni.com
PWM
Pulse-width modulation. Generation of a pulse waveform with fixed
frequency and variable pulse width (duty cycle). PWM is used to control
discrete devices such as DC motors and heaters by varying the pulse width
(the ration of on time to off time).
subnet
A set of systems whose IP addresses are configured such that they can
communicate directly with one another. Data will not flow through an
intermediate router.
TCP
Transmission Control Protocol. A set of standard protocols for
communicating across a single network or interconnected set of networks.
TCP is for high-reliability transmissions.
UDP
User Datagram Protocol. A set of standard protocols for communicating
across a single network or interconnected set of networks. UDP is for
low-overhead transmissions.
V
Volts.
VDC
Volts direct current.
VI
Virtual Instrument. A combination of hardware and/or software elements,
typically used with a PC, that has the functionality of a classic stand-alone
instrument.
W
Watts.
