The use of the term 'redundancy' in the communications context was primarily introduced by the mathematician and electrical engineer, Claude E. Shannon. It is not the amount of information that is increased, but the probability that the information reaches the recipient. For the industrial network this finding is of fundamental significance.
If a message does not reach a recipient in an office environment, this error can be corrected by sending the message again later. In the industrial environment this same error can have serious consequences. If, for instance, a robot on a production line does not receive the necessary information for several minutes, or even for a few seconds, the entire production line may be affected. In certain circumstances it could mean the line stops.
Hirschmann has developed the Hiper-Ring (for Ethernet networks) based on the concept of the Spanning Tree Protocol. The Hiper-Ring significantly increases the availability of the network and facility, while with Spanning Tree, 30 seconds typically elapse before the failure of a link is compensated, with Hiper-Ring this takes less than half a second. The structure is considerably simplified, as only one additional cable is necessary for Hiper-Ring. Also of interest is the possibility of expansion. A recovery time of a maximum of 500 ms is guaranteed for topologies with up to 50 switches that support the Hiper-Ring concept. The maximum possible distance between two devices is 70 km. Optical ports are available for covering larger distances, which means that the rapid switchover time of 500 ms is made possible for networks covering considerably more than 3000 km.
Introduction to Part 2 loop signatures and process transfer functions
Fieldbus & Industrial Networking
The previous series of loop signature articles dealt with the basics of control loop optimisation, and concentrated on troubleshooting and ‘SWAG’ tuning of simple processes. In this new series, consideration will be given to dealing practically with more difficult issues like interactive processes, and with processes with much more complex dynamics.
Read more...Siemens sets new standards in drive technology
Fieldbus & Industrial Networking
Siemens is setting new standards in industrial drive technology with the launch of its new high-performance drive system, Sinamics S220. This offers a seamless and innovative drive system with comprehensive simulation and analysis capabilities and advanced connectivity features that enable full integration into digital work processes.
Read more...PC-based control in the plastics industry Beckhoff Automation
Fieldbus & Industrial Networking
Nissei Plastic, an injection moulding machine manufacturer based in Japan is implementing a worldwide tend towards open automation systems from experienced specialists using PC and EtherCAT-based control technology from Beckhoff.
Read more...Loop Signature 31: Non-linearity in control loops (Part 2) Michael Brown Control Engineering
Fieldbus & Industrial Networking
This article is a continuation of Loop Signature 30 published in the last issue in this series, exploring reasons for non-linearities which may be encountered in feedback control loops
Read more...PC-based control optimises robotic parts handling on plastics machinery Beckhoff Automation
Editor's Choice Fieldbus & Industrial Networking
NEO is a cartesian robot developed by INAUTOM Robótica in Portugal for parts removal on plastics machinery. Its aim is to increase system productivity. NAUTOM Robótica has entered into a strategic partnership with Bresimar Automação to increase the working speed of the cartesian robots using advanced control and motion solutions from Beckhoff. The result is a comprehensive, future-proof automation solution for its entire family of cartesian robots.
Read more...PC-based control for flat wire motors for electric vehicles Beckhoff Automation
Fieldbus & Industrial Networking
Special machine manufacturer, ruhlamat Huarui Automation Technologies unveiled the second generation of its mass production line for flexible stators with bar winding. This enables extremely short production cycle and line changeover times, supported by PC- and EtherCAT-based control technology from Beckhoff.
Read more...PC-based control technology in additive manufacturing Beckhoff Automation
Editor's Choice Fieldbus & Industrial Networking
As an open control platform, PC-based control supports different engineering approaches, including low-code programming. The machine builder, Additive Industries uses this to create the code for the TwinCAT runtime of its 3D printers.
Read more...Integrating fire alarm systems into building management systems Beckhoff Automation
Fieldbus & Industrial Networking
Fire alarm systems work independently of the building automation system. Schrack Seconet has developed a flexible gateway using ultra-compact industrial PCs and TwinCAT from Beckhoff, which can be used to flexibly convert a customer-specific communication protocol to a wide range of transmission standards.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version