Automating Manufacturing Systems - Process Control and ...

plc glossary - 35.16
see Exclusive OR (EOR).
ion - an atom, molecule or subatomic particle that has a positive or negative charge.
IP (internet Protocol) - the network layer (OSI model) definitions that allow internet use.
IP datagram - a standard unit of information on the internet.
ISDN (Integrated Services Digital Network) - a combined protocol to carry voice, data and video over 56KB
lines.
ISO (International Standards Organization) - a group that develops international standards in a wide variety
of areas.
isolation - electrically isolated systems have no direct connection between two halves of the isolating device.
Sound isolation uses barriers to physically separate rooms.
isolation transformer - a transformer for isolating AC systems to reduce electrical noise.
35.10 J
JEC (Japanese Electrotechnical Committee) - A regional standards group.
JIC (Joint International Congress) - an international standards group that focuses on electrical standards.
They drafted the relay logic standards.
JIT (Just in Time) - a philosophy when setting up and operating a manufacturing system such that materials
required arrive at the worksite just in time to be used. This cuts work in process, storage space,
and a number of other logistical problems, but requires very dependable supplies and methods.
jog - a mode where a motor will be advanced while a button is held, but not latched on. It is often used for
clearing jams, and loading new material.
jump - a forced branch in a program
jumper - a short wire, or connector to make a permanent setting of hardware parameters.
35.11 K
k, K - specifies magnitudes. 1K = 1024, 1k = 1000 for computers, otherwise 1K = 1k = 1000. Note - this is
not universal, so double check the meanings when presented.
Kelvin - temperature units that place 0 degrees at absolute zero. The magnitude of one degree is the same as
the Celsius scale.
KiloBaud, KBaud, KB, Baud - a transmission rate for serial communications (e.g. RS-232C, TTY, RS-422).
A baud = 1bit/second, 1 Kilobaud = 1KBaud = 1KB = 1000 bits/second. In serial communication
each byte typically requires 11 bits, so the transmission rate is about 1Kbaud/11 = 91 Bytes per
second when using a 1KB transmission.
Karnaugh maps - a method of graphically simplifying logic.
kermit - a popular tool for transmitting binary and text files over text oriented connections, such as modems
or telnet sessions.
keying - small tabs, prongs, or fillers are used to stop connectors from mating when they are improperly
oriented.
kinematics/kinetics - is the measure of motion and forces of an object. This analysis is used to measure the
performance of objects under load and/or in motion.
35.12 L
label - a name associated with some point in a program to be used by branch instructions.