Tag Archives | dcs


Modern DCS Graphics: Level 1 Overview Displays

Editor’s Note: ANSI/ISA-18.2-2009, Management of Alarm Systems for the Process Industries and ISA-101, Human-Machine Interfaces are valuable standards for users designing level 1 displays. Level 1 display design cannot be a one-size-fits-all approach. What may work for operators at one company may not work for others somewhere else. The challenge is to find the balance […]

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Webinar Recording: ROI of In-Line Optical Spectroscopy in Process Manufacturing

Process manufacturer often use water somewhere in their processes, and having precise, accurate moisture measurements can mean millions of dollars in ROI. In this informative webinar, experts explore the immense benefits — in reducing waste, increasing yield, and improving quality — and ROI of employing optical spectroscopy solutions in-line to measure moisture in real time. […]

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AutoQuiz: Changing the Point of Origin for Input Data and Output Signal Destination with a DCS

Today’s automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for information about the CCST program. This question comes from the Level I […]

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Integrating DCS I/O to an Existing PLC

At the NASA Glenn Research Center (GRC) in Cleveland, Ohio, existing programmable logic controller (PLC) input/output (I/O) was replaced with distributed control system (DCS) I/O, while keeping the existing PLC sequence logic. Until about the year 2000, the GRC’s central process system (CPS) distributed control system used PLC I/O to remotely control and monitor process […]

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Man presses button on electronic control panel, close-up

Webinar Recording: How Can Front-End Loading Streamline the Control System Migration Process?

Your control system wasn’t designed for the plant you have today − it was created specifically for the plant that was built long ago. Think of all the changes that have been made in that time, all the improvements in quality, throughput and enterprise integration you’ve made − or would like to make − if only […]

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Colorful pipes

Use Signal Characterization in the DCS to Linearize the Installed Flow Characteristic of a Valve

Signal characterization to linearize valve installed flow characteristic has a bad reputation due to some practical implementation problems. These problems can be addressed today by doing the characterization in the distributed control system (DCS), but the stigma remains. With pneumatic positioners, signal characterization was done by the use of a cam. Standard cams were based […]

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Newbie working

10 Pitfalls of DIY Control Systems

The debate over the virtues of the distributed control system (DCS) vs. the programmable logic controller (PLC) has been ongoing since these two architectures came into existence 40 years ago. But as functionality differences narrow and price points align, the arguments are getting more intense than ever. The DCS has always focused on distributing control […]

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What are the Benefits of Migrating from an Older DCS to a New Automation System?

Many distributed control systems (DCS) in process plants are approaching the end of their useful lives, forcing facilities to migrate from an old DCS to a modern automation system. Although these migration projects require significant investment, funds spent can often be recovered quite quickly through savings from improved operations, less downtime, and decreased support costs. […]

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