Patent application number | Description | Published |
20090013330 | Methods and Devices for Sending Transmission-Time or Reception-Time Information for a Transmitted or Received Message - Upon reception of a message which is relevant to synchronization, the circuitry in a device forms a piece of reception-time information and this information is inserted into or appended to the received message and forwarded such that the reception-time information can be received by at least one synchronization application in the device. When a message is transmitted, the circuitry in the device forms a piece of transmission-time information, and this information is sent to at least one synchronization application initializing the message in the device. A fundamental advantage can be seen in that the economic outlay, particularly the outlay in terms of circuitry, for implementing the synchronization of the clocks and the determination of the communication-network or transmission-medium delay times, particularly on the basis of the IEEE standard 1588, m is substantially reduced. | 01-08-2009 |
20090086766 | Method for transmitting synchronization messages in a communication network - There is described a method for transmitting synchronization messages in a communication network, the communication network comprising a plurality of network nodes communicating with one another, each containing an internal clock, which is timed with a node clock frequency assigned to the respective network node. The synchronization messages transmitted in the communication network serve to synchronize the times of the internal clocks of the network nodes and contain the pulse counter status of a synchronization clock operating at a predefined synchronization clock frequency. The pulse counter status is estimated by each network node and updated in the synchronization message. Changes in the synchronization clock frequency are taken into account when estimating the pulse counter status. Precise determination of the pulse counter status is achieved with the aid of an approximation of the change over time in the pulse ratio between synchronization clock frequency and node clock frequency by means of a function, with the result that the pulse ratio on transmission of a new synchronization message can be predicted and a precise current pulse counter status can be determined on the basis of the predicted pulse ratio. The method is particularly suitable for use in a communication network of an industrial automation system, whose components communicate with one another for example according to the Profinet standard. | 04-02-2009 |
20100070977 | CONTROL OF THE RUNTIME BEHAVIOR OF PROCESSES - A method for controlling runtime behavior of processes of an automation system is provided. A priority is assigned to each of the processes, wherein an operating system of the automation system assigns runtime to the processes as a function of their priority. A scheduling service monitors starting and ending of all processes, wherein the highest priority available in the operating system is assigned to the scheduling service. Metadata is assigned to at least one process, the data including at least one rule on the priority of the process. The scheduling service analyzes the metadata and registers the process for monitoring when starting a process to which metadata is assigned, wherein the scheduling service monitors the registered processes for compliance with the at least one rule per process, and wherein the scheduling service modifies the priorities of the registered processes, the at least one rule of which is in non-compliance, according to the rule. | 03-18-2010 |
20120327950 | Method for Transmitting Data Packets - Method for transmitting data packets in an Ethernet automation network, wherein the method comprises receiving a first data packet having a first priority by a transmitter, starting a transmit operation to send the first data packet from the transmitter to a receiver, receiving a second data packet having a second priority at an instant in time by the transmitter, where the second priority is higher than the first priority, and where the second data packet is to be transmitted to the receiver. The method further comprises aborting the transmit operation of the first data packet within one of the data frames of the first data packet which is located in the transmit operation at the time of the reception of the second data packet, and thereupon transmitting the second data packet from the transmitter to the receiver. | 12-27-2012 |
20130013951 | Method for Synchronizing an Operating Clock with a Time Clock of an Automation Network - A method for synchronizing an operating clock with a time clock in an automation network comprising a plurality of sync slaves that are to be coordinated and a time sync master, wherein the plurality of sync slaves are synchronized with respect to the time clock by the time sync master, and wherein the plurality of sync slaves derive their operating clock from the time clock. | 01-10-2013 |
20130013952 | Method for Integration of Systems with Only One Sync Domain for Time of Day and Clock Pulse Synchronization into a Global Time of Day Synchronization Domain - A method for synchronizing the operating clock and the timing clock of a subordinate domain of an automation network, wherein sync slaves are synchronized by a clock sync master with respect to an operating clock, a clock sync master forms part of a subordinate domain, a single synchronization message serves to synchronize the sync slaves with respect to their respective operating clock and timing clock, wherein the method comprises providing a notification of the difference between the timing clock and the operating clock using the synchronization message, and accepting this difference into the synchronization message as additional information. | 01-10-2013 |
20130286820 | Communication Device For An Industrial Communication Network Which Can Be Operated In A Redundant Manner And Method For Operating A Communication Device - A communication device for an industrial communication network which can be operated in a redundant manner comprises a first and a second transmitting and receiving unit that transmit data packets in a bumpy or bumpless manner inside the industrial communication network and are selectively changeable over to a bumpy or bumpless transmission mode. An evaluation unit is connected to the first and/or second transmitting and receiving unit(s) and detects data packets to be transmitted in the bumpy or bumpless manner inside the industrial communication network. Redundancy handling and filter units for received redundant data packets are deactivated when a data packet to be transmitted in the bumpy manner is detected. A memory unit is assigned to the first and/or second transmitting and receiving unit(s) and buffers at least one data packet to be transmitted in the bumpy manner during a predefined period of time in the bumpy transmission mode. | 10-31-2013 |
20150049639 | Communication Device and Method for Redundant Message Transmission in an Industrial Communication Network - For redundant message transmission in an industrial communication network having an arbitrarily meshed network topology, mutually independent paths are ascertained for a communication link that is redundant at least in sections between two network nodes within the industrial communication network, where the mutually independent paths comprise separate network nodes of a single communication network, and messages with duplicate identifiers are interchanged between transmission and reception units of communication devices of the industrial communication network in accordance with forwarding rules that correspond to the ascertained paths. | 02-19-2015 |