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Dive into the research topics where Gerhard Hammer is active.

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Featured researches published by Gerhard Hammer.


euromicro conference on real time systems | 2002

Real-time communications over hybrid wired/wireless PROFIBUS-based networks

Mário Alves; Eduardo Tovar; Francisco Vasques; Gerhard Hammer; Klaus Röther

PROFIBUS is an international standard (IEC 61158) for factory-floor communications, with some hundreds of thousands of world-wide installations. However, it does not include any wireless capabilities. In this paper we propose a hybrid wired/wireless PROFIBUS solution where most of the design options are made in order to guarantee the proper real-time behaviour of the overall network. We address the timing unpredictability problems placed by the co-existence of heterogeneous transmission media in the same network. Moreover, we propose a novel solution to provide inter-cell mobility to PROFIBUS wireless nodes.


Archive | 2006

Wireless communication device for use in automation network, has field device providing necessary operation energy at preset operating time by energy management unit, where operation energy of field device is stopped at preset idle time

Gerhard Hammer; Stefan Lüder; Klaus Röther


Archive | 2004

Network with redundancy properties, a branching unit for a user device in a network, redundancy manager for a network with redundancy properties and method for operating a network with redundancy properties

Holger Fehrmann; Friedhelm Geiger; Gerhard Hammer; Klaus Röther


Archive | 1988

Readily available serial bus system

Martin Dipl Ing Clauss; Fridolin Egle; Gerhard Hammer; Nikola Dipl Ing Vukas


Archive | 2013

Duplex data transfer via portable electronic device and field device

Christoph Weiler; Gerhard Hammer


Archive | 2002

Method for operating a network with wireless transmission of data and subscriber for said network

Gerhard Hammer; Klaus Roether


Archive | 2006

Network, especially PA PROFIBUS network, with redundancy has branching elements that check state of cable connected to one network connection when supply voltage received at other connection, only forward voltage if cable not faulty

Holger Fehrmann; Friedhelm Geiger; Gerhard Hammer; Klaus Röther


Archive | 2010

Automatisierungsnetzwerk sowie feldgerät und netzwerkkomponente für ein automatisierungsnetzwerk

Christoph Weiler; Gerhard Hammer


Archive | 2010

Automation network, and field device and network component for an automation network

Christoph Weiler; Gerhard Hammer


Archive | 2009

Welding torch for producing a welding path comprises a housing connected to the housing of a sensor via a connecting element to allow the sensor to pivot toward and away from the torch

Gerhard Hammer; Andreas Hermann; Franz Kogler; Hans Rechberger; Gerald Steger; Siegfried Thaler

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