Glossary
G-6
ni.com
P
PC
personal computer
peer-to-peer
DeviceNet communication scheme in which each device communicates as
a peer and connections are established among devices as needed.
PLC
Programmable Logic Controller
polled I/O
Master/slave I/O connection in which the master sends a poll command to
a slave, then receives a poll response from that slave.
protocol
A formal set of conventions or rules for the exchange of information among
devices of a given network.
R
RAM
Random-access memory
remote
Within NI-DNET, anything that exists in another device of the device
network (not on the same host as the NI-DNET driver).
resource
Hardware settings used by National Instruments DeviceNet hardware,
including an interrupt request level (IRQ) and an 8 KB physical memory
range (such as
D0000
to
D1FFF
hex).
S
s
seconds
scanned polling
A polled I/O communication scheme in which all poll commands are sent
out at the same rate, in quick succession.
sensor
A device that measures electrical, mechanical, or other signals from an
external, real-world variable; in the context of device networks, sensors are
devices that send their primary data value onto the network; examples
include temperature sensors and presence sensors. Also known as
transmitter.
server
In explicit messaging connections, the server is the device to which the
service is directed.
