Gourt > Business > Electronics and Electrical > Control Systems > Process Control (1)
Process control is a statistics and engineering discipline that deals with architectures, mechanisms, and algorithms for controlling the output of a specific process. See also control theory.
For example, heating up the temperature in a room is a process that has the specific, desired outcome to reach and maintain a defined temperature (e.g. 20°C), kept constant over time. Here, the temperature is the controlled variable. At the same time, it is the input variable since it is measured by a thermometer and used to decide whether to heat or not to heat. The desired temperature (20°C) is the setpoint. The state of the heater (e.g. the setting of the valve allowing hot water to flow through it) is called the manipulated variable since it is subject to control actions.
A commonly used control device called a ‘’’programmable logic controller’’, or a PLC, is used to read a set of digital and analog inputs, apply a set of logic statements, and generate a set of analog and digital outputs. Using the example in the previous paragraph, the room temperature would be an input to the PLC. The logical statements would compare the setpoint to the input temperature and determine whether more or less heating was necessary to keep the temperature constant. A PLC output would then either open or close the hot water valve, an incremental amount, depending on whether more or less hot water was needed. Larger more complex systems can be controlled by a Distributed Control System (DCS) or SCADA system.
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RT: @macroart: à¸à¸´à¸à¸ªà¹à¸¡à¹à¸ à¸à¸±à¸à¸à¹à¸²à¸¢à¹à¸ = continuous process // à¸à¹à¸à¸à¸¡à¸µ Feedback Control รึà¸à¹à¸²à¸§à¸à¸£à¸±à¸ à¹à¸§à¹à¹à¸à¹à¸à¸à¸¥à¸§à¹à¸²à¸à¸µà¹à¸à¸à¸à¹à¸à¹à¸à¹à¸à¸¡à¸±à¹à¸¢ ^^
ZiiT (ZiiT) Fri, 18 Dec 2009 02:53:38 -0000
RT: @macroart: กินส้มไป ขับถ่ายไป = continuous process // ต้องมี Feedback Control รึป่าวครับ ไว้เช็คผลว่าที่ออกไปโอเคมั๊ย ^^
In the process of re-leasing my house...7 months before my lease ends. I'm gonna call my state congressman. Pre-leasing is out of control.
jameslynnmiller (James L. Miller) Thu, 17 Dec 2009 23:06:16 -0000
In the process of re-leasing my house...7 months before my lease ends. I'm gonna call my state congressman. Pre-leasing is out of control.
Conducting an "Implementing Statistical Process Control" 3 day class for the American Society for Quality.www.oqlsolutions.com
OQLSolutions (Janet Nelson) Thu, 17 Dec 2009 23:03:34 -0000
Conducting an "Implementing Statistical Process Control" 3 day class for the American Society for Quality.www.oqlsolutions.com
we control very little of our mind content, so meditation can raise long forgotten phobies and fears. thats the cleansing process.-love b.v.
buddhaworld (Living Buddha Volko ) Thu, 17 Dec 2009 23:01:23 -0000
we control very little of our mind content, so meditation can raise long forgotten phobies and fears. thats the cleansing process.-love b.v.
Process Control Engineer: Process Control Engineer Apply for this position O03-70008823DO03-70008823CO03-70008823A ... http://bit.ly/6YM6yh
WorkinSaudi (Living Overseas) Thu, 17 Dec 2009 22:14:50 -0000
Process Control Engineer: Process Control Engineer Apply for this position O03-70008823DO03-70008823CO03-70008823A ... http://bit.ly/6YM6yh
Control Expenses and Automate Process through Workflow Software - on SMBCEO.com - http://bit.ly/8N9obk
OPTSolutions (Laura Pettit Rusick) Thu, 17 Dec 2009 22:04:56 -0000
Control Expenses and Automate Process through Workflow Software - on SMBCEO.com - http://bit.ly/8N9obk
Associates. - Providers of PLC process control analysis, impletation and expertise in electrical engineering and consultancy, based in Victoria, Australia.
Maintenance, Inc. - Providing customized industrial process control instrumentation and control systems to the process control industries of the US.
Meta Description: [ The answer to your Control System Integration Needs ]
Technology GmbH - Germany. Development and manufacture of measurement instruments and process control systems. Also, contract measurement services. Technical product information and specifications in text and PDF versions. English and German.
Meta Description: [ Was auch immer produziert wird, gleichgültig aus welchem Material und in welchen Mengen - einwandfreie Qualität wird nur durch eine gleichbleibend hohe Perfektion erreicht. Und die muss laufend kontrolliert werden. Das leistet ein Partner, der weltweit als Einziger alle Bereiche der Oberfläche... ]
A.I.Lanteck Inc. - PLC and HMI programming, process control visualization, system integrators and SCADA development. Also memory device, motor and drive programming.
American Controls Corporation - Manufacturer and integrator of process control units, RTUs, and systems for liquid and gas stations and processors. Product specifications and project case studies.
Meta Description: [ American Controls Corporation : Control Systems Manufacturer and Integrator ]
ControlLoop, Ltd. - Provides bespoke software and process control solutions to customers. Based in UK.
Meta Description: [ ControlLoop, Control Loop provides software and process control solutions to our customers. We provide unbeatable service, quality and value-for-money to our customers. ]
Custom Electronic Systems, Inc - USA. Design and manufacture of industrial process control systems and testing equipment.
EFI - Manufacturer of process control systems for plastic moulding, heating and multi-cavity-drop zone controllers.
Neptune Controls - Surplus and used parts for the Honeywell TDC 2000 and TDC 3000 distributed control systems.
Meta Description: [ Surplus Honeywell TDC 2000 & TDC 3000 Parts ]
Orange Instruments - Design and manufacture process control systems including control panels, instruments, positioners, and package assembly.
Meta Description: [ Northampton, UK based suppliers of process control systems, designed for oil, food and pharmaceutical industries, offering both electrical and electronic process control, and custom instrumentation ]
Powerflow Electronics - Manufacturer of controls for process air systems and air dryers.
Presys Instruments Inc. - Manufactures instrumentation and process control producing calibrators, indicators, controllers and software.
Meta Description: [ Presys is an ISO9001 certified company specialized in instrumentation and process control producing calibrators, indicators, controllers, softwares to meet customers needs for reliability and accuracy ]
RS Controls - Service provider for process controls for the agriculture, industrial and commercial sectors. Southeastern US.
Meta Description: [ A company that services process controls provides industrial automation and performs industrial automation for the agriculture industrial and commercial sectors. With over 30 years experience in controls technology. You can be assured that your control and control task are in good and experienced... ]
SICK Vertriebs GmbH - Germany. Multi-national manufacturers of sensors, sensor and safety systems, and analysis and process measurement devices and complete systems for industrial applications. English and German.
Smar - Manufacturer of process control systems and instrumentation, includes product and service descriptions, white papers, and company information.
Meta Description: [ Smar International Corp. is recognized as a global leader in controls and instrumentation for process and manufacturing automation. The company maintains operations in eight countries, as well as an extensive, international network of distributors and representatives. Recognized as 'First In Fi... ]
SpectrAlliance, Inc. - Manufactures fiber-optic spectrometers and spectrometer accessories designed expressly for industrial process control.
Meta Description: [ Fiber-optic, in line spectrometer systems for industrial process control and laboratory automation applications. Product line includes microscope and benchtop spectrometers and fiber-optic probes and accessories. ]
Spectrum Technology, Inc. - Outsourced technical services for process control technology in Central New York offering calibration/metrology, maintenance, and engineering services.
Synectic Design Ltd. - A manufacturer of industrial process control and measurement instrumentation and systemsincluding amplifiers, batch controllers, flow meter controllers, portable load meters, calibration tools, data loggers, signal converters, industrial displays and I/O modules.
Meta Description: [ As a manufacturer of Industrial Process Electronics, we provide controllers and metering for weight and flow ]
Syscom 18 SRL - An integrator of process control and instrumentation applications.
Meta Description: [ Solutii complete pentru automatizari industriale,Complete Solutions For Control & Instrumentation ]
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