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Showing posts from June, 2009

GE Fanuc makes PACSystems RX3i Controller redundant

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June 2, 2009 - GE Fanuc Intelligent Platforms introduced its scalable high availability solution for the PACSystems RX3i controller. By combining essential processes and capabilities onto one platform, the PACSystems RX3i controller is one of the most powerful, scalable, flexible, and efficient means to increasing productivity. It now adds high availability to its multi-domain functionality along with logic, motion, HMI, and process control.

Built on a synchronized hot-standby redundant control platform with transparent bumpless process switchover and easy configuration, PACSystems High Availability facilitates continuous uptime in essential applications.

GE Fanuc’s PACSystems RX3i High Availability is designed to keep essential systems running efficiently and reliably by connecting two independent controllers on our proven RMX reflective memory technology link providing up to 2 Mbytes of data synchronization. If an event occurs with the primary controller, the control functionality is …

S7-300/400 CPUs: Temperature Recording in the S7-CPU by Means of Pt100 Resistivity Thermometer and SITRANS TK-L Measuring Transducer

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ProblemAlmost everywhere where products or materials are processed or worked, the temperature has a decisive influence on the quality of the final product and the course of the process respectively. It is thus necessary to record the temperature, to interpret its influence and to specifically react to changes in temperature using control technology. SolutionThe device combination of SIMATIC products and SIEMENS temperature sensors including measuring transducers is an excellent solution to the mentioned problem. In this application, a Pt100 sensor records the temperature of a measuring object and a SITRANS TK-L measuring transducer converts the sensor's measuring signal into an injected current which is supplied to an analog input of the compact CPU. The current temperature measurement value is displayed both numerically and as a bar chart on a TP170A touch panel.
Using the special STEP7 application software, which you can download (see below), it is additionally possible to ... de…

Video Tutorial: The High-Level Language S7-SCL

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Topic
SIMATIC software is the integrated system environment for all SIMATIC systems and provides you with the ideal tool for every task at each phase of your project for optimizing your engineering workflow. The SIMATIC software offers a wide choice of programming languages that support you in the implementation phase. From these various languages, therefore, it is possible to select the language most suitable for each task to be mastered in an automation plant and thus keep time and costs down to a minimum. Thanks to the higher language constructs supplied with it, S7-SCL is suitable for calculations and data management algorithms. Content
Based on a brief comparison of the programming languages included in STEP 7 Professional, we show you the decisive advantages of the high-level language S7-SCL that is similar to Pascal. We look at a number of language constructs in detail and demonstrate on the fly how you can implement complex algorithms quickly and easily with S7-SCL. This module …

Video Tutorial: Testing and Commissioning Functions

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SIMATIC software is the integrated system environment for all SIMATIC systems and provides you with the ideal tool for every task at each phase of your project for optimizing your engineering workflow. The SIMATIC software gives you optimum support in the “ Testing and Commissioning“ phase with practical testing tools and diagnostics functions. Content
Here we demonstrate the practical testing tools and diagnostics functions of the SIMATIC Manager.By running through typical commissioning tasks we show the practical application and benefit of these functions for commissioning hardware and software. This module shows in graphically animated scenes the customer benefits that the tool provides for each relevant project phase, the basic functions of the tools live test sequences.Presentation
The following properties are contained in all technically-oriented demonstration systems: All graphic animations are explained by a spoken text which has been read by German, respectively Englis…

The Graphical Language S7-GRAPH

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SIMATIC software is the integrated system environment for all SIMATIC systems and provides you with the ideal tool for every task at each phase of your project for optimizing your engineering workflow. If there are sequential operations in a facility which are dividible into single processing steps, the automation solution will be considerably simplified with the use of sequence charts by means of the graphical language S7-GRAPH which can be applied easily and intuitively. Content
Taking a technological example we demonstrate how to employ the S7-GRAPH engineering tool to realize a sequence chart.You will learn how a technological runtime structure can simply be turned into a runnable user program. This module shows in graphically animated scenes the customer benefits that the tool provides for each relevant project phase, the basic functions of the tool live projection of sequence charts..Presentation
The following properties are contained in all technically-oriented demonstra…

The SIMATIC Manager

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SIMATIC software is the integrated system environment for all SIMATIC systems and provides you with the ideal tool for every task at each phase of your project for optimizing your engineering workflow. The SIMATIC Manager guarantees the smooth interaction of these projecting and programming tools by the integration of all these functions and tools, a common database and a consistent operation philosophy. Content
Here you are informed on how the SIMATIC Manager meets these requirements. In addition a live demonstration ist staged which shows you how an automation project is created using the SIMATIC Manager. This module shows in graphically animated scenes the customer benefits that the tool provides for each relevant project phase, the basic functions of the tool live projecting sequences of a real project.Presentation
The following properties are contained in all technically-oriented demonstration systems: All graphic animations are explained by a spoken text which has been …

The Basic Languages LAD, FBD, STL

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Topic of the demonstration system
SIMATIC Software is the integrated system environment for all SIMATIC systems and offers the user the perfect tool for each task and each project phase in order to optimize his engineering workflow. The basic software STEP 7 comprises the three languages LAD, FBD and STL which are in accordance with the IEC standard and which are learnable easily and intuitively. The three languages all possess an extensive stock of functions which can be applied to the entire range of SIMATIC Controllers. Contents of the demonstration system
This demonstration system presents the three basic languages LAD - Ladder Diagram, FBD - Function Block Diagram and STL - Statement List. In doing so, we show the properties and possibilities provided by the various tools of the SIMATIC Manager for the implementation of a user program in the three language variants. In the form of animated graphical sequences, the module demonstrates tthe customer benefits that each language …

Demonstration System: SIMATIC Screencast Tutorials

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SIMATIC Software is the integrated development environment for all SIMATIC systems and offers the user the ideal tool for each task and each project phase in order to optimize his engineering workflow.The SIMATIC screencasts show selected multimedia-based scenarios of the software and provide an overview of the smooth interaction of the configuration and programming tools. The content of these Screencast tutorials is structured so the user can follow the introduced functions or configuration tasks successfully with his installed software. Content
Using the following SIMATIC Screencast tutorials, functions, editors and option packages of the SIMATIC software are demonstrated live. Programming Languages LAD, FBD, STL Access Protection for Projects and Libraries Import and Export Functions of STEP 7 PROFINET Topology Editor S7-GRAPH Sequence Charts Visioning and Comparison of Projects with SIMATIC Version Trail and SIMATIC Version Cross Manager Integrated Configuration with Catalog …

Energy Saver systems for Induction motors.

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Are they a sham? Do they work?

There seems to be a resurgence in interest in the Nola energy saving algorithm for induction motors, with a number of manufacturers beginning to market "new" and "improved" versions of this technology.

The technology was originally proposed and developed by Frank Nola of NASA in the mid to late 70s as a means of reducing energy wastage on small single phase induction motors. From the initial NASA developments, we saw a number of manufacturers world wide gaining manufacturing rights and marketing the technology in various forms. Difficulties were experienced in the early days in applying this technology to three phase motors in a fashion that it would perform with stability and reliability. Many patent applications were made in the early 80s covering variations on the technology as it could…

PID Control Systems.

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PID is an enhanced feed back system designed to determine the overall system behaviour. A simple feedback system comprises a single feedback path and is proportional only.Feedback systems are used to reduce or eliminates errors. In a typical PID installation, we have a set point and the PID feedback systems works to keep the output value equal to the setpoint value. It is possible for the setpoint value to be a changing value, but this can add complication.
An ideal system would have a linear transfer function, zero phase shift and zero delay. Under these conditions, a proportional control is all that is needed.
A real world system commonly has a non linear transfer function (pumping is a classic case) and there can be a considerable delay between the "action" and the "reaction" (measured value). If a purely proportional control is applied under these conditions, …