This Control Essentials Guide is the first in a continuing series of interactive PDFs by the editors of Control. Essentials of Safety Instrumented Systems is designed to provide process industry professionals with an up-to-date, top-level understanding of the most important SIS issues. From fundamental concepts and terminology to the ongoing debate over integrated vs. stand-alone safety systems, get up to speed quickly on the key technology and marketplace drivers.01/28/2013
In this whitepaper learn how to build scalability into all systems and processes to ensure long-term success.01/21/2013
Understanding the accuracy of a given flowmeter is an important field but it can also be misleading as different specifications are used to explain how accurate a flowmeter measurement actually measures. This paper discusses the different specifications and interprets the impact of them.
Why deal with accuracy?
The reasons for dealing with flowmeter accuracy specifications are many-folded. One important reason is from an economical point of view. The more accurate a flowmeter can measure, the more money you will save as the medium is measured with only very little inaccurately.
Another reason is in terms of dosing, where a given amount of a medium is added. This must be done with a high level of precision and the accuracy is thus important in order to dose correctly. This is critical in certain industries such as in pharma or chemical.
A third reason is in terms of billing purposes. By performing with good accuracy, you know exactly how much fluid flows into the process. Thereby, you are able to determine the right price of the product and thereby bill the customers correctly.
Therefore, knowing how much that flows through your system is paramount in order to make a profitable and solid business. You need to rely on a precise measurement with good accuracy. However, good accuracy must be obtained not only in one measurement, but in all measurements independent of the time.01/21/2013
Learn How Today's High Performance Instrumentation Enabled by Wireless Technology Can Help Boost Plant Performance Across a Range of Important Metrics01/17/2013
Learn 5 Reasons to switch to distributed modular I/O01/16/2013
Thin clients are performance heavyweights in industrial applications, cutting up-front and lifecycle costs while improving reliability and security. Virtualization and thin clients are two of the leading trends in computing, both in the commercial and industrial sectors. For industrial applications, virtualization and thin clients intersect when thin clients are used as a key component in virtualization strategies for process control and MES. In this white paper, you will learn about the benefits of virtualization, the interrelationship between both virtualization and thin-client technologies, why the thin-client approach is often the least expensive solution, and advantages of thin clients over PCs.01/16/2013
This article describes two independent techniques for ensuring strong security in systems using OPC Classic technology01/14/2013
Preventing the next Stuxnet-like attack on the control world might be impossible, but operators can mitigate the effects and contain worms and viruses through early detection.01/07/2013
Industrial control networks are highly vulnerable to intelligent remote attacks, as well as non-intelligent viruses. With threats to these networks increasing in complexity and scope, decision makers need to take action before it's too late.01/04/2013
This paper examines the benefits and shortfalls of both safety PLCs and configurable safety relays. It also examines a new way of handling safety in industrial automation, "SafetyBridge" technology.01/02/2013
More than 60 percent of all industrial temperature measurement applications in the U.S. use thermocouples. Despite their widespread use, there are many misconceptions about thermocouples. This paper will discuss some of the basic technical issues that engineers need to consider when applying thermocouples.12/30/2012
This white paper identifies the top five challenges typically encountered on the factory floor, and offers some criteria to consider when selecting industrial PCs and associated components.12/28/2012
This White Paper explains:
- What the 3S CoDeSys vulnerabilities are and what an attacker can do with them
- How to find out what control/SCADA devices are affected
- The risks and potential consequences to SCADA and control systems
- The compensating controls that will help block known attack vectors
A number of security vulnerabilities in the CoDeSys Control Runtime System were disclosed in January 2012. In October 2012, fully functional attack tools were also released to the general public.
While CoDeSys is not widely known in the SCADA and ICS field, its product is embedded in many popular PLCs and industrial controllers. Many vendors are potentially vulnerable, and include devices used in all sectors of manufacturing and infrastructure. As a result, there is a risk that criminals or political groups may attempt to exploit them for either financial or ideological gain.
This White Paper summarizes the currently known facts about these vulnerabilities and associated attack tools. It also provides guidance regarding a number of mitigations and compensating controls that operators of SCADA and ICS systems can take to protect critical operations.12/26/2012
Water conservation is becoming a major focal point, both in the public and private sector whether it is due to cost of water, availability of water, or environmental concerns.12/22/2012
Wastewater treatment facilities are generally installed for one purpose - to clean up dirty water so that clean water can be discharged back into the environment. Nearly all municipal treatment plants rely on biological processes for wastewater treatment whereby bacteria and other microorganisms, frequently called 'bugs,' do this job of cleaning up the water.12/20/2012
This white paper provides insight into the evolution of the modern SCADA system and looks to the very near future by discussing such timely topics as:
- Improving system efficiency and security
- Managing field data and
- Open standards
Some 66% of the process control systems now in use globally were installed before publication of today's commonly used safety standards, IEC 61508 and IEC 61511/ISA 84. Here's how to tell if you safety systems are up to snuff.12/13/2012
The editors of Control and Control Design compiled this special report from the 21st annual Automation Fair event, hosted by Rockwell Automation, in Philadelphia, November 5-8. This interactive PDF includes more than 20 articles documenting highlights ranging from executive keynotes and new product announcements to vertical industry forums and Rockwell Automation Process Solutions User Group and Safety Automation Forum meetings.12/11/2012
Halloween in New Orleans this year saw more than the usual array of costumed revelers on Bourbon Street. Indeed, hundreds of process automation professionals descended on the Crescent City to exchange ideas and best practices at Yokogawa's 2012 User Group Conference and Exhibition. The Control editorial team was on hand and developed this exclusive report of presentation highlights--on topics ranging from safety system risk management to the latest in data acquisition technology.12/10/2012
There are over two hundred pressure sensor suppliers around the world, offering products from a few dollars to thousands of dollars. A purchaser or engineer unfamiliar with pressure sensors can become overwhelmed with the price range, quality and options. The first step is to understand his/her application from the media being measured, to the desired electrical output for indication or control. The following is a guide through a variety of options to make a prudent decision.
Media is the most important item when selecting a pressure sensor for an application. Most sensor suppliers only sell sensors that are rated for benign environments such as clean, dry air. The next tier of suppliers will sell products that will handle mild environments through to difficult/corrosive environments. Clean water, steam, some forms of hydraulic oils and Freon can be considered mild environments. Difficult media tends to be corrosive liquids and gases such as hydrogen sulfide, hydrochloric acid, bleach, bromides, waste water and hydrogen. Wrongful selection of a pressure sensor can lead to catastrophic failure and serious injury. When unsure, ask the pressure sensor manufacturer to provide a chemical compatibility chart with their products. In fluidic systems, such as water and hydraulics, one must understand how the water hammer and pressure transients effect the pressure sensor.11/15/2012