Engineering Real-Time Applications with WorldFIP: Analysis and Tools
نویسندگان
چکیده
The WorldFIP protocol is based on a centralised medium access control mechanism, where a specific station, the bus arbitrator (BA), controls all data transfers between different stations. At configuration time, the BA is given a list of process variables to scan along with their corresponding periods. This piece of information is known as the bus arbitrator table. In this paper we provide a comprehensive study on how to configure a WorldFIP bus arbitrator table (BAT), in order to guarantee that periodic data transfers are performed before their deadlines. The main contributions of this paper are the provision of both an algorithmic approach for setting the WorldFIP BAT (using RM and EDF) and a feasibility test to check a priori the timeliness requirements of the periodic data transfers.
منابع مشابه
Distributed Computing for the Factory-Floor: a Real-Time Approach using WorldFIP Networks
Field communication systems (fieldbuses) are widely used as the communication support for distributed computer-controlled systems (DCCS) within all sort of process control and manufacturing applications. There are several advantages in the use of fieldbuses as a replacement for the traditional point-to-point links between sensors/actuators and computer-based control systems, within which the mo...
متن کاملContributions for the Worst-Case Response Time Analysis of Real-Time Sporadic Traffic in WorldFIP Networks
In this paper we address the ability of WorldFIP to cope with the real-time requirements of distributed computercontrolled systems (DCCS). Typical DCCS include process variables that must be transferred between network devices both in a periodic and sporadic (aperiodic) basis. The WorldFIP protocol is designed to support both types of traffic. WorldFIP can easily guarantee timeliness requiremen...
متن کاملDesign, implementation, and performance analysis of the WorldFIP/ATM local bridge
World factory instrumentation protocol (WorldFIP) is a fieldbus network protocol that provides a link between level zero (sensors/actuators) and level one (field controllers such as programmable logic controllers, etc.) in industrial automation systems. Accessing and connecting the WorldFIP remotely is important for monitoring, maintaining, and controlling devices in a factory in which asynchro...
متن کاملAdvanced Uses of the Worldfip Fieldbus for Diverse Communications Applications within the Lhc Power Converter Control System
The LHC power converter control system is based on an embedded computer designed at CERN called a Function Generator/Controller (FGC). Every one of the 1700 LHC power converters will include an FGC responsible for the control and monitoring of the converter’s state (on, off, standby, etc...) as well as the generation of the current reference and the regulation of the measured current. The opera...
متن کاملSynchrosqueezing-based Transform and its Application in Seismic Data Analysis
Seismic waves are non-stationary due to its propagation through the earth. Time-frequency transforms are suitable tools for analyzing non-stationary seismic signals. Spectral decomposition can reveal the non-stationary characteristics which cannot be easily observed in the time or frequency representation alone. Various types of spectral decomposition methods have been introduced by some resear...
متن کامل