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Activity

  • Fuzzy Logic Control – Example

    Terry Blevins
    In this fuzzy logic control workshop contained in Chapter 6 of Advanced Control Foundation – Tools, Techniques, and Applications, the control performance of fuzzy logic control is be compared to the performance of PID control. For this example, the control objective is to reach setpoint in minimum time with no overshoot. Two identical process heaters … Continue reading » Read the full text.

  • Updated DeltaV SIS Hardware Carriers Product Data Sheet

    Larry Griffin
    There are three types of carriers used for DeltaV SIS hardware – the logic solver carrier, the SIS controller carrier and the SISNet Repeater carrier. All hardware carriers are mounted on a T-type DIN rail. (695KB PDF) Read the full text.

  • Fuzzy Logic Control – Commissioning

    Terry Blevins
    To allow consistent implementation of control applications, fuzzy logic control may be implemented as a function block. The fuzzy rules and membership functions can be predefined except for the scaling of the membership functions for error, change in error, and change in output.  As addressed in Chapter 6 of Advanced Control Foundation – Tools, Techniques, … Continue reading » Read the full text.

  • VEGA Minitrac31 Rev 2 and Fibertrac31 Rev 2 Fieldbus Device Files

    Larry Griffin
    In Emerson’s continuing commitment to open and interoperable standards, the VEGA Minitrac31 Rev 2 and Fibertrac31 Rev 2 have passed the rigorous and comprehensive testing of the DeltaV Stress Test labs. Using the Device Installation Kits for Emerson Products website at http://www2.emersonprocess.com/en-US/documentation/deviceinstallkits/Pages/deviceinstallkitsearch.aspx, these fieldbus device files are now available for…

  • Press Release: Emerson support services help increase throughput and reduce energy usage at MOL gas processing plant

    Larry Griffin
    Industry and technology expertise have enabled continuous improvement of plant systems and processes AUSTIN, TEXAS (August 5, 2013) — Emerson Process Management’s support services have helped the MOL Group increase throughput, improve product quality and reduce energy usage at the Algyõ gas plant in Hungary. Control loop audits, advanced process control project management, and model [...] Read the full text.

  • Press Release: Emerson automation technologies and services help INA Rijeka refinery meet latest European fuel specifications

    Larry Griffin
    Emerson coordinates complex automation project involving multiple EPCs and helps ensure on time start-up and efficient operations AUSTIN, TEXAS (August 2, 2013) — Emerson Process Management has successfully completed a project to install integrated automation and safety systems on three units at a new hydrocracking complex at the INA Rijeka refinery in Croatia. The plant [...] Read the full text.

  • Fuzzy Logic Control – Implementation

    Terry Blevins
    To minimize the time needed to apply fuzzy logic control, most manufacturers offer a version of fuzzy logic control in which the rules and membership functions are pre-defined. As described in Chapter 6 of Advanced Control Foundation – Tools, Techniques, and Applications, , a manufacturer can provide support for auto-tuning by restricting the fuzzy logic … Continue reading » Read the full text.

  • Updated DeltaV Obsolete Server Replacement Product Data Sheet

    Larry Griffin
    The DeltaV Obsolete Server Replacement provides new server hardware to replace legacy servers for DeltaV v9.3.1 and v10.3.1. (390KB PDF) Read the full text.

  • Fuzzy Logic Control

    Terry Blevins
    Fuzzy logic is a relatively new control technology. In the mid-1970s Mamdani began to investigate fuzzy logic as an alternative to the PID controller and sparked the first practical applications of fuzzy logic in the process control industry. The controller followed rules that generated an output by evaluating the error and the change in error. … Continue reading » Read the full text.

  • Updated DeltaV Virtualization Hardware Product Data Sheet

    Larry Griffin
    The DeltaV Virtualization Hardware has thoroughly tested and supported computer and peripheral devices for use with DeltaV Virtualization, including host servers, storage area networks (SAN), thin clients, and network switches. (420KB PDF) Read the full text.

  • Adaptive Tuning – Example Application

    Terry Blevins
    It is often possible to spot where adaptive control is needed by observing trends of control loops that show the control parameter and valve position during a time period when the process conditions change over their normal span of operation. If the control performance varies with changes in operating conditions, then adaptive tuning may be … Continue reading » Read the full text.

  • Adaptive Tuning – Field Experience

    Terry Blevins
    The adaptive tuning capability included in DeltaV was field tested at four customer sites during the initial stages of product development. This field trail was conducted over a six month period and include over 1000 control loops. One of the field trail sites was at Lubrizol, Deer Park, TX where this adaptive control capability was … Continue reading » Read the full text.

  • Updated M-Series Virtual I/O Module 2 Product Data Sheet

    Larry Griffin
    The M-Series Virtual IO Module 2 (VIM2) simulates M-Series IO Cards and digital field devices when used with MYNAH Technologies’ MiMiC Software. (500KB PDF) Read the full text.

  • Maintenance Management and Control System Integration

    Jim Cahill
    A blog post by Emerson’s Anand Iyer. Since the days of my “initiation” in this field, machinery protection has always been another system, whose domain has been questioned many a times. While the instrumentation and control (I&C) team would probably maintain...

  • Adaptive Tuning – Models Identified

    Terry Blevins
    The basis of adaptive tuning is the identification of the process step response based on operator changes in the loop operation. For example, when a control loop is in Automatic mode, changes made in the setpoint can trigger process model identification. If the loop mode has been changed to Manual, then changes by the operator … Continue reading » Read the full text.

  • Plant Alarm Management and Analysis

    Jim Cahill
    It’s almost like a Friday here in the US as we head into the 4th of July Independence Day weekend. Let’s end the short week with a YouTube video on alarm management by Emerson’s Kim VanCamp. In the 8:25 YouTube video, DeltaV Analyze, Kim opens by describing...

  • Adaptive Tuning – Model Switching

    Terry Blevins
    During the development of the DeltaV adaptive tuning capability, we researched and evaluated many of the most common techniques for implementing adaptive tuning. Also, as part of this research we came across a number of technical articles on a relative new adaptive tuning technique known as model switching. This technique depends on the evaluation of … Continue reading » Read the full text.

  • Getting the Power and Grounding Right

    Jim Cahill
    The finest instrumentation, final control, and control systems won’t deliver the performance you require if the power and grounding are not right. I caught up with Emerson’s Stephan Kerrebijn who highlighted its importance as the basis for a reliable...

  • Press Release: Emerson to automate CNOOC South China Sea natural gas development platform

    Larry Griffin
    Deepwater natural gas development project will use Emerson’s DeltaV™ technology AUSTIN, TEXAS (June 25, 2013) – CNOOC Limited has selected Emerson Process Management to provide process automation, safety, and asset management technology for a gas production project in the South China Sea. The deepwater project includes the Liwan 3-1 field, jointly developed by CNOOC and [...] Read the full text.

  • Process Simulation to Test Compressor Anti-Surge Control Strategy

    Jim Cahill
    Some of our most consistently popular posts here at Emerson Process Experts center on anti-surge control for centrifugal compressors. I had the opportunity to catch up with Emerson’s Ashish Patki when he was in town last month. Ashish shared a story where...

  • Adaptive Tuning

    Terry Blevins
    A perfectly-tuned PID controller can degrade over time and perform poorly or become oscillatory. There are two main reasons for these changes: The controlled process is non-linear, and the process operation has entered a region with significantly different process parameters than those used during the tuning. The process operating conditions have changed since the auto-tuning … Continue reading » Read the full text.

  • The Benefits of FDI Technology

    Terry Blevins
    The ISA104 Device Integration committee was established to develop or adopt, and to facilitate the application of standards and technical reports that represent device and interface descriptions for access of field devices in automation systems. In 2012 the scope of the committee was expanded to include the promotion of the Field Device Integration (FDI) standard, … Continue reading » Read the full text.

  • Application of Kalman Filtering in DeltaV

    Terry Blevins
    A paper published in 1960 by Rudolf Kálmán “A New Approach to Linear Filtering and Prediction Problems” is the basis for the Kalman Filter. The Kalman filter has been successfully used in a wide variety of applications: • The guidance of commercial airplanes • Seismic data processing • Nuclear power plant instrumentation • Vehicle navigation … Continue reading » Read the full text.

  • Updated DeltaV Virtualization Whitepaper

    Larry Griffin
    This whitepaper provides an overview of Emerson’s DeltaV Virtualization solutions for both on-line production systems and off-line systems for development, testing, and training. (2MB PDF) Read the full text.

  • Updated DeltaV Virtual Studio Product Data Sheet

    Larry Griffin
    DeltaV Virtual Studio makes it easy to create and maintain virtual DeltaV systems for development, testing, training and on-line production. (1.16MB PDF) Read the full text.

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