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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.
A feedback control loop is directly controlled by the RTU or PLC, but the SCADA software monitors the overall performance of the loop. For example, a PLC may control the flow of cooling water through part of an industrial process to a set point level, but the SCADA system software will allow operators to change the set points for the flow.
Ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits. As programmable logic controllers became more sophisticated it has also been used in very complex automation systems. Often the ladder logic program is used in conjunction with an HMI program operating on a computer workstation
President-elect Donald Trump, in an exclusive interview with “Meet the Press,” also said he is open to working with Democrats on a legislative way to keep Dreamers in the United States.
[4] In the case of linear feedback systems, a control loop including sensors , control algorithms, and actuators is arranged in an attempt to regulate a variable at a setpoint (SP). An everyday example is the cruise control on a road vehicle; where external influences such as hills would cause speed changes, and the driver has the ability to ...
American Airlines has said its premium revenue rose 8% year over year in the third quarter. The company plans to grow its higher-tier seats by about 20% over the next two years through 2026.
In this podcast, Motley Fool host Dylan Lewis and analysts Ron Gross and Asit Sharma discuss: The state of the stock market as investors head into the new year, the outlook for 2025, and the big ...
Siemens SIMATIC S7-300 PLC CPU with three I/O modules attached. As with other programmable logic controllers, SIMATIC devices are intended to separate the control of a machine from the machine's direct operation, in a more lightweight and versatile manner than controls hard-wired for a specific machine. Early SIMATIC devices were transistor ...