The basics of plc technology
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Programmable logic controllers (PLCs) were invented in 1968 to automate industrial processes and have since been used in thousands of applications to replace manual controls. Traditionally, pump installations involved manual operation of valves and monitoring of the pump by operators. A PLC can automate the pump cooling and priming process by automatically sensing temperature, detecting leaks, starting the pump, and ensuring proper operation. It can also identify problems and shut down the system until maintenance is performed, reducing pump life-cycle costs. PLCs provide automated control and monitoring to improve safety and efficiency for processes like cryogenic pump operation.
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The basics of plc technology
- 1. The Basics Of PLC Technology
- 2. A Little Introduction • Programmable Logic Controllers (PLCs) were invented in 1968 for the automotive industry. • Since then, PLCs have been used for automating electromechanical devices in thousands of applications. • These units replace mechanical timers and manual components while providing temperature sensing, data acquisition and Ethernet communication.
- 3. Automated Pump Processes • Traditional pump installations include the electric motor, cryogenic drive “warm end,” cryogenic “cold end” and the motor start/stop. • The fill plant operator manually opens the cryogenic bulk tank liquid valve and recirculation valve to start the pump cool-down process.
- 4. Automated Pump Processes • Once the operator determines that the pump has been cooled, he starts the pump and watches for any leaks or if the pump is not primed and cavitating. • These conditions can damage or shorten the life of the pump and can result in significant repair and replacement costs.
- 5. Automated Pump Processes • By automating the pump with a PLC system, the controller automatically senses the correct cool-down temperature, senses any leaks, starts the pump and ensures proper function of the pump, allowing fill plant personnel to perform other functions in the plant.
- 6. Automated Pump Processes • The PLC can determine if a problem has been discovered and shut down the system until proper maintenance has been done. • This can reduce overall pump life-cycle cost. Article Source: weldingandgasestoday.org
- 7. Learn more in PLC Programming with PLC Drive Industrial Automation Online Certificate Course [Refer: http://goo.gl/g20Qf3 ; courses@wiziq.com]