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  • A User’s Guide to Pressure Measurement

    A Complete Precision Pressure Measurement Handbook Covering the Fundamentals of Pressure Measurement, Deadweight Pressure Testers, Calibration of Deadweight Testers, AMETEK's Deadweight Testers, Manometers, Secondary Comparison Pressure Standards and the Selection of a Pressure Measurement Standard.

  • Ethernet: Convergence, Choices, Complexities

    Ethernet is penetrating ever deeper into distributed control systems to provide real-time control with direct connectivity to a wider range of devices while the insatiable demand for speed (e.g. 10/40/100G) from commercial applications are driving continual advancements in Ethernet technologies.

    This expanded deployment of Ethernet in manufacturing has triggered convergence of disparate network technologies over a single Ethernet-based infrastructure, and this trend has left the controls engineer with new and more choices regarding how to specify and install the necessary network physical infrastructure. It becomes clear that network convergence continues unabated, thereby generating new and expanded network physical infrastructure options.

    Shawn Adams, PANDUIT Global Solutions Manager
  • Shaft Grounding – Fulfilling the Promise of Variable Frequency Drives

    With the rising cost of energy, the use of variable frequency drives (VFDs) is growing at an increasing rate. By optimizing the frequency of a three-phase alternating-current (AC) induction motor’s voltage supply, a VFD controls the motor’s speed and torque while providing energy savings. And, these energy savings can be quite substantial — 20% or more — making VFDs a “green” solution as well as a wise money-saving investment.

    However, in order to be truly “green,” a technology must be sustainable as well as energy efficient. Yet the currents induced on motor shafts by VFDs can wreak havoc with motor bearings, dramatically shortening motor life and severely diminishing the reliability of systems. To mitigate these currents and realize the full potential of VFDs, a cost-effective method of shaft grounding is essential.

    Adam Willwerth, Development Manager, Electro Static Technology
  • OPC Bridging Transfers Data between Industrial Automation Systems

    Integrators frequently use OPC technology to connect one Industrial Automation system (PLC, DCS, SCADA, HVAC, etc) with another so data can be shared between the two systems. Because OPC technology is based on the Client/Server architecture, the challenge is that two OPC Servers cannot communicate with each other directly. A variety of vendors provide an intermediate software solution, generically called an “OPC Bridge,” to facilitate this sort of communication. This whitepaper discusses the concept of the OPC Bridge, the solution architecture, required software components, and various features to help Integrators differentiate between different OPC Bridge products.

    OPC Training Institute
  • An Application of IEEE 1588 to Industrial Automation

    This paper describes an application of the IEEE 1588 standard to Industrial Automation. Key application use cases are identified that can benefit from time-based control techniques to improve performance results over traditional control methods. This paper will also briefly discuss how the 1588 standard may be adopted to suit these applications. Application problems specific to industrial automation are enumerated and candidate solutions described.

    Ken Harris, Member, IEEE
  • SNMP – A New Paradigm for SCADA

    This white paper describes how SNMP is applied to asset management and transportation of "shadow data," information on equipment maintenance and security within the SCADA system. Since SNMP has emerged as a very efficient vehicle for transportation of this information, it is feasible for addition to existing systems. The white paper includes descriptions of smart function blocks, which significantly reduce programming efforts when used with Semaphore's T-BOX RTU and Kingfisher RTU product lines.

    Semaphore, Vishal Prakash and Robert Casey
  • Safeguarding Your Plant Automation Systems with Change Management

    The increased use of plant floor automation to achieve production goals has created a dependency on PLCs, PC control systems and programmable automation. These devices and their logic programs are costly to develop but vital to the running of the plant, and are viewed by most companies as corporate assets. It is incumbent on plant and corporate management to insure that proper safeguards are in place to protect and manage change in these assets. This paper examines the sources and types of changes that take place in plant automation environments, and the considerations and approaches necessary to safeguard your automation systems through the effective use of a Change Management System (CMS).

    MDT Software, Gary Gillespie
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