@inproceedings{StoidnerMathesFreisleben, author = {Stoidner, Christoph and Mathes, Markus and Freisleben, Bernd}, title = {Sequence-Controlled Web Services for Programmable Logic Controllers}, series = {13th IFAC Symposium on Information Control Problems in Manufacturing}, volume = {42}, booktitle = {13th IFAC Symposium on Information Control Problems in Manufacturing}, number = {2}, publisher = {Elsevier}, doi = {https://doi.org/10.3182/20090603-3-RU-2001.0128}, pages = {396 -- 401}, abstract = {The use of service-oriented architectures based on web services in the manufacturing layer of industrial enterprises enables vertical integration and promises increased interoperability. Unfortunately, the differing execution patterns—cyclic execution on programmable logic controllers vs. on-demand execution on industrial PCs—complicate the use of web services in the manufacturing layer. This paper introduces sequence-controlled web services that permit to easily export a control module as a web service. An automation engineer can use familiar IEC 61131-3 programming languages to implement the control application and subsequently can export selected modules as web services.}, language = {en} } @inproceedings{MathesStoidnerHeinzletal., author = {Mathes, Markus and Stoidner, Christoph and Heinzl, Steffen and Freisleben, Bernd}, title = {SOAP4PLC: Web Services for Programmable Logic Controllers}, series = {17th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing}, booktitle = {17th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing}, publisher = {IEEE Computer Society Press}, doi = {https://doi.org/10.1109/PDP.2009.42}, pages = {210 -- 219}, abstract = {The use of service-oriented architectures based on web services in the manufacturing layer of industrial enterprises yields vertical integration and promises increased interoperability and flexibility. Unfortunately, two main obstacles complicate the use of web services in the manufacturing layer. First, the hardware/software used in this layer differs from the hardware/software used in other layers. Second, the manufacturing layer is maintained by automation engineers who typically are not familiar with web services. This paper presents the first SOAP engine for programmable logic controllers to advance the use of web services in the manufacturing layer. The engine offers a low memory footprint to respect the low computational power of programmable logic controllers and allows to export web services automatically without intervention of an automation engineer.}, language = {en} } @article{MathesStoidnerSchwarzkopfetal., author = {Mathes, Markus and Stoidner, Christoph and Schwarzkopf, Roland and Heinzl, Steffen and D{\"o}rnemann, Tim and Dohmann, Helmut and Freisleben, Bernd}, title = {Time-Constrained Services (TiCS): A Framework for Using Real-time WS in Industrial Automation}, series = {Service Oriented Computing and Applications (SOCA) Journal}, volume = {3}, journal = {Service Oriented Computing and Applications (SOCA) Journal}, number = {4}, publisher = {Springer}, address = {London}, pages = {239 -- 262}, language = {en} }