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Glossary
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890USE17700 April 2004
industrial I/O An Advantys STB I/O module designed at a moderate cost for typical continuous,
high-duty-cycle applications. Modules of this type often feature standard IEC
threshold ratings, usually providing user-configurable parameter options, on-board
protection, good resolution, and field wiring options. They are designed to operate
in moderate-to-high temperature ranges.
input filtering The amount of time that a sensor must hold its signal on or off before the input
module detects the change of state.
input polarity An input channel’s polarity determines when the input module sends a 1 and when
it sends a 0 to the master controller. If the polarity is normal, an input channel will
send a 1 to the controller when its field sensor turns on. If the polarity is reverse, an
input channel will send a 0 to the controller when its field sensor turns on.
input response
time
The time it takes for an input channel to receive a signal from the field sensor and
put it on the island bus.
INTERBUS
protocol
The INTERBUS fieldbus protocol observes a master/slave network model with an
active ring topology, having all devices integrated in a closed transmission path.
IP internet protocol. That part of the TCP/IP protocol family that tracks the internet
addresses of nodes, routes outgoing messages, and recognizes incoming
messages.
LAN local area network. A short-distance data communications network.
light industrial
I/O
An Advantys STB I/O module designed at a low cost for less rigorous (e.g.,
intermittent, low-duty-cycle) operating environments. Modules of this type operate in
lower temperature ranges with lower qualification and agency requirements and
limited on-board protection; they usually have limited or no user-configuration
options.
linearity A measure of how closely a characteristic follows a straight-line function.
LSB least significant bit, least significant byte. The part of a number, address, or field that
is written as the rightmost single value in conventional hexadecimal or binary
notation.
L