Abstract:
The invention relates to a fieldbus improvement comprising the incorporation of additional earth conductors in the bus cable which is used for communication and power supply purposes, in order to achieve greater immunity against transient overvoltage disturbances from the electronic distributed-control modules that are connected to said bus cable. The invention's field of application extends to include any area of the industrial sector using a decentralised fieldbus control system, in order to improve the immunity and availability of the distributed control of the technical process thereof.
Abstract:
When a bus protocol message arrives on a connecting node (28) a bus driver in the node captures the message and stores it into a message buffer where the message can be further processed by a tunneling application. Each received bus protocol message is broken, or combined, to suit the available packet size of the underlying transmit (28) layer of the switch fabric network. Data portions such as message identification, sequence number, port number, bus data type, and data length are reserved in each data packet. If the message is being broken down, the sequence number is used to differentiate the broken segments of the bus protocol message. The bus data type is used to indicate the type of protocol data being transmitted over the switch fabric (22).
Abstract:
El objeto de la presente invención consiste en la mejora de "buses de campo" incorporando conductores de tierra adicional en el cable "bus" utilizado para comunicaciones y alimentación, para conseguir una mayor inmunidad contra perturbaciones transitorias de sobretensión de los módulos electrónicos de control distribuido conectados a dicho cable "bus". Su campo de aplicación se extiende a todo el sector industrial que esté dotado de un sistema de control descentralizado por "bus de campo" y que desee mejorar la inmunidad y disponibilidad del control distribuido de su proceso técnico.
Abstract:
In one embodiment, the locations of a plurality of network devices in a low power and lossy network (LLN) are determined along an intelligent wire. One or more neighboring devices for each network device in the plurality are identified based on the locations of the network devices along the intelligent wire. A communication schedule for the network devices is determined that prevents neighboring devices along the intelligent wire from transmitting on the same frequency. The network devices are assigned to communication time slots based on the communication schedule. The network devices are also assigned frequency offsets based on the communication schedule.
Abstract:
One embodiment provides a method for receiving subnet administration (SA) data using a remote direct memory access (RDMA) transfer. The method includes formatting, by a network node element, an SA data query with an RDMA-capable flag; configuring, by the network node element, a reliably-connected queue pair (RCQP) to receive an RDMA transfer from a subnet manager in communication with the network node element on an RDMA-capable network; and allocating, by the network node element, an RDMA write target buffer to receive the SA data using an RDMA transfer from the subnet manager in response to the SA data query.
Abstract:
Bei einem Verfahren zum sicheren Versenden von Daten von einem Feldgerät der Prozessautomatisierungstechnik über einen Feldbus wird das Sendesignal während des Versendens im Feldgerät als Kontrollsignal erfasst. Über die Analyse des Kontrollsignals kann festgestellt werden, ob die gewünschten Daten ordnungsgemäß vom Dateninhalt bzw. von der Signalform gesendet wurden.
Abstract:
Die Erfindung betrifft die Synchronisation der Zeiten von (logischen) Uhren in einem Fahrzeug. Insbesondere betrifft die vorliegende Erfindung die Synchronisation von Zeiten von Uhren in Knoten verschiedener Bussysteme eines Fahrzeugs. Es wird ein Gateway (101) für ein Fahrzeug beschrieben. Der Gateway (101) ist eingerichtet, eine Nutz-Nachricht von einem ersten Knoten (131) eines ersten Feldbussystems (130) an einen zweiten Knoten (121) eines zweiten Feldbussystems (120) weiterzuleiten, wobei das erste (130) und das zweite (120) Feldbussystem unterschiedlich sind. Außerdem ist der Gateway (101) eingerichtet, eine erste Uhr (301) in dem ersten Knoten (131) mit einer zweiten Uhr (301) in dem zweiten Knoten (121) zu synchronisieren.
Abstract:
A data transfer system utilizes one or more standard parameters in a fieldbus messaging system (10) as a mechanism to move arbitrarily large blocks of arbitrary binary data into and out of a field device (12, 15, 16). The preferred embodiment of the invention moves delineated streams of octets across a virtual connection to arid from the device by layering and tunneling, utilizing the underlying fieldbus network as a transport mechanism. These octet sequences are referred to as VStreams TM. One or more devices (12, 15, 16) on the fieldbus network may have one or more VStreams TM active simultaneously, in either direction. Preferably, a standard multi-byte parameter supported by the fieldbus is defined for use as a window, preferably as large as the underlying fieldbus will allow. Writes to this parameter are interpreted as sequential transfers of data in to the field device (12, 15, 16). Reads from this parameter are interpreted as sequential transfers of data out of the field device (12, 15, 16).
Abstract:
When a bus protocol message arrives on a connecting node in the network, a bus driver in the node captures the message and stores it into a message buffer where the message can be further processed by a tunneling application. Each received bus protocol message is broken, or combined, to suit the available packet size of the underlying transmit layer of the switch fabric network. Data portions such as message identification, sequence number, port number, bus data type, and data length are reserved in each data packet. If the message is being broken down, the sequence number is used to differentiate the broken segments of the bus protocol message. The bus data type is used to indicate the type of protocol data being transmitted over the switch fabric. The same tunneling application may be used to reassemble the bus protocol message at a receiving node.