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In 1985, Rockwell International purchased Allen-Bradley for $1.651 billion; this was the largest acquisition in Wisconsin's history to date. [3] For all intents and purposes, Allen-Bradley took over Rockwell's industrial automation division. The 1990s featured continued technology development, including the company's launch of its software ...
A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.
Allen-Bradley is the brand-name of a line of factory automation equipment owned by Rockwell Automation.The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers (), human-machine interfaces, sensors, safety components and systems, software, drives and drive systems, contactors, motor control centers, and systems of such products.
Rockwell acquired the privately held Allen-Bradley Company for US$1.6 billion (roughly $4.7 billion today) [13] in February 1985, of which $1 billion ($2.9 billion today) [13] was cash, and became a producer of industrial automation hardware and software.
SFC is an inherently parallel programming language in that multiple control flows — Program Organization Units (POUs) in the standard's parlance — can be active at once. Non-standard extensions to the language include macroactions: i.e. actions inside a program unit that influence the state of another program unit.
Ladder logic is widely used to program PLCs, where sequential control of a process or manufacturing operation is required. Ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits.
ControlNet is an open industrial network protocol for industrial automation applications, also known as a fieldbus.ControlNet was earlier supported by ControlNet International, but in 2008 support and management of ControlNet was transferred to ODVA, which now manages all protocols in the Common Industrial Protocol family.
Lynde Bradley (August 19, 1878 – February 8, 1942), the brother of Harry Lynde Bradley, was the co-founder of the Allen-Bradley Company and the Lynde and Harry Bradley Foundation. Bradley was born in Milwaukee, Wisconsin , the eldest son of Henry Clay Bradley and Clara Blanchard Lynde, and attended Milwaukee Public Schools.
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