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Video traffic is increasingly used in modern factory automation applications in order to improve the quality of the processes. However, since they require high bandwidth it may be difficult for critical applications to adapt dynamically to bandwidth requirements that may change in time, without affecting the performance of the overall applications, especially when they are time-sensitive. In this...
This paper presents a new service for CORBA applications that orchestrates the timely execution of the tasks of a distributed real-time system in a flexible way. It follows the CORBA philosophy of complementing the CORBA standard with additional services that solve specific problems and facilitate using CORBA in complex applications. The service has been designed for highly coupled applications that...
It is well known that modern factory automation applications must be able to adapt to changes in the production requirements. Since most manufacturing applications are distributed, it may be necessary to reconfigure several devices simultaneously. Unfortunately, dealing with reconfiguration is a complex issue for the developers of the applications, especially when applications are time-sensitive or...
Modern companies must be able to react in a timely way to changes in production and financial information since quick responses provide advantages against competition. As a matter of example, in automated trading systems a delay of 1 ms may be worth $1M. In addition, nowadays business decisions are made on the basis of increasing volumes of information, complicating the adoption of decisions on time...
Although a few industrial automation systems have also been implemented with DDS, this standard has not yet gained much significance in factory automation applications for several reasons. One of these reasons is that since DDS is aimed at a broad range of application domains and it may be necessary to provide certain guidelines in order to use it efficiently in factory automation applications by...
This paper describes the different communication patterns followed in industrial communications and maps them into DDS (Data Distribution Service) which is a recent middleware specification. This specification follows the publisher/subscriber paradigm and it is characterized by providing an API that allows tuning the QoS (Quality of Service) of the applications with a large set of parameters. This...
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