Title :
Synchronization of processes in a distributed real time system exemplified by the control system of the fusion experiment WENDELSTEIN 7-X
Author :
Schacht, J. ; Laqua, H. ; Niedermeyer, H.
Author_Institution :
Max-Planck Inst. fur Plasmaphys., Teilinst. Greifswald
Abstract :
The fusion experiment Wendelstein 7-X demands synchronizing processes in many distributed technical components with an accuracy from milliseconds to nanoseconds. For this purpose a trigger-time-event system (TTE system) was developed. Its main task is the synchronization of all control components and data acquisition systems. It allows time stamping, processing of trigger signals and event messages. The TTE system offers the possibility to program timing sequences and delays, logic combinations or conditions. After a description of the TTE system the task synchronization in the control system of WENDELSTEIN 7-X is discussed. A special software library (TimeLib) allows dealing with time related variables in a simple and comfortable manner. The efficiency of the synchronization system is exemplified
Keywords :
control engineering computing; data acquisition; high energy physics instrumentation computing; nuclear fusion; physical instrumentation control; real-time systems; software libraries; synchronisation; timing; TimeLib; WENDELSTEIN 7-X; control system; data acquisition system; distributed real time system; distributed technical component; event message processing; fusion experiment; process synchronization system; software library; task synchronization; timing sequence program; trigger signal processing; trigger-time-event system; Centralized control; Control systems; Data acquisition; Distributed control; Heating; Optical fiber networks; Plasma diagnostics; Real time systems; Temperature control; Timing;
Conference_Titel :
Real Time Conference, 2005. 14th IEEE-NPSS
Conference_Location :
Stockholm
Print_ISBN :
0-7803-9183-7
DOI :
10.1109/RTC.2005.1547420
