The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The adoption of IEC 61850 in the deployment of Substation Automation System opens new scenarios to system design. The presence of a communication infrastructure connecting Intelligent Electronic Device (IED), sensors and protections may suggest the development of distribute measurement devices, where the sampling of the physical quantities and the elaboration of the sampled value could be performed...
The modern industrial and substation automation Ethernet networks have demanding requirements about high availability. Recently, the IEEE 802.1 WG proposes the IEEE 802.1aq, also known as Shortest Path Bridging, to manage Ethernet redundant networks. The IEEE 1588 protocol can exploit the SPB capabilities to manage multiple paths in order to improve synchronization availability. In the paper, the...
Real-time networks for substations automation systems are based on ICT technologies and they may take great advantages from ultra recent network technological improvements. A careful evaluation of the performance enhancement is required. Due to cost and system complexity, such an analysis can be performed only using a dedicated simulation environment, but the currently available simulation libraries...
Communication redundancy and time synchronization are two important requirements commonly found in industrial systems. However, achieving high redundancy performance in combination with highly accurate time synchronization at all times is a challenging task. EtherCAT is a high performance, functionality rich communication technology offering both advanced redundancy features and accurate time synchronization...
The need for efficient multicast filtering in Industrial Ethernet networks will most likely rise as a result of its increased usage of multicast protocols and its increasing network capacity. The current support for multicast filtering in industrial Ethernet networks is somewhat limited since the available functionality for handling of L2 multicast is poorly supported both in switches and device stacks...
As Industrial Ethernet evolves it will increasingly include integration with the ??IT network?? in order to utilize the benefits which the use of Ethernet provides. This will result in a mixed protocol environment also in the industrial networks, which in turn will require proper usage of QoS in order to maintain the demanding requirements of latency, jitter and packet loss in the Industrial Ethernet...
Ethernet is emerging as the preferred industrial communication platform upon which a multitude of protocols and solutions specially targeted at industrial communication requirements have been developed. This paper concentrates on a set of protocols popularly referred to as the Real-time Ethernet protocols and analyses two key technologies, namely PROFINET IRT and EtherCAT. The real-time performance...
Automation devices are getting more complex by the integration of the Ethernet switch functionality into the devices. Manufacturers of industrial devices increasingly need to have deep knowledge about the basic standards associated with Ethernet in order to produce devices with predictable and stable behavior. This paper shows that the introduction of the Ethernet switch into automation devices is...
In this paper, we describe a method to test and characterize accelerometers using an accurate position sensor and nonlinear Kalman filters. The method is designed to estimate parameters in nonlinear accelerometers and could be a simpler alternative to methods using centrifuges or vibrational testing. The method makes it possible to do real-time parameter estimation. In addition, the method can be...
The move towards Ethernet based communication solutions in automation is accompanied by a need for determinism and real-time performance. The subject of this paper is the measured real-time performance across a switched Ethernet segment. Performance at 100 Mbps and 1 Gbps network speed was measured using UDP on Windows and Linux. Output stack times in the 8-16 mus range were measured with low processor...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.