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Title |
Page |
| WOAA01 |
The ILC Control System
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271 |
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- R. S. Larsen
SLAC, Menlo Park, California
- F. Lenkszus, C. W. Saunders, J. Carwardine
ANL, Argonne, Illinois
- P. M. McBride, M. Votava
Fermilab, Batavia, Illinois
- S. Michizono
KEK, Ibaraki
- S. Simrock
DESY, Hamburg
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Since the last ICALEPCS, a small multi-region team has developed a reference design model for the ILC Control System as part of the ILC Global Design Effort. The scale and performance parameters of the ILC accelerator require new thinking in regards to control system design. Technical challenges include the large number of accelerator systems to be controlled, the large scale of the accelerator facility, the high degree of automation needed during accelerator operations, and control system equipment requiring “Five Nines” availability. The R&D path for high availability touches the control system hardware, software, and overall architecture, and extends beyond traditional interfaces into the accelerator technical systems. Software considerations for HA include fault detection through exhaustive out-of-band monitoring and automatic state migration to redundant systems, while the telecom industry’s emerging ATCA standard–conceived, specified, and designed for High Availability–is being evaluated for suitability for ILC front-end electronics. Parallels will be drawn with control system challenges facing the ITER CODAC team.
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Slides
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| WOAA02 |
Outsourcing, Insourcing, and Integration of Control Systems in the Australian Synchrotron
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276 |
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- M. Clift, B. W. Karnaghan, W. K. Lewis, A. C. Starritt, R. I. Farnsworth
ASP, Clayton, Victoria
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The Australian Synchrotron was built in less than four years and under budget with many subsystems outsourced. This presentation discussed some of the issues involved. It discusses the reasons for outsourcing, the approach taken, and some of the technical issues involved, including open source versus proprietary software, testing, training, collaboration, and source control. The importance of a solid engineering approach, specification, interface, systems design, and in-house ability are discussed. A discussion of engineering standards, both hardware and software, is presented. A balance of the positive and negative elements of the approach is put forward, and some suggestions for future projects run on similar lines are made.
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Slides
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| WOAA03 |
LHC Cryogenics Control System: Integration of the Industrial Controls (UNICOS) and Front-End Software Architecture (FESA) Applications
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281 |
| |
- P. Gayet, E. Blanco
CERN, Geneva
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The LHC cryogenics control system is based on the CERN Industrial framework UNICOS (Unified Industrial Control System). UNICOS covers aspects related to both the SCADA (Supervisory Control and Data Acquisition) and the PLCs (Programmable Logic Controllers). The LHC cryogenic instrumentation must deal with the hostile radiation environment present in the accelerator tunnel preventing the use of off-the-shelves sensor signal conditioners. The conditioners are then realized with rad hard components connected to the control system through a WordlFIP fieldbus. A custom application using a FESA (Front-End Software Architecture) framework has been developed in an industrial PC, the standard CERN solution for WorldFIP interfacing. The solution adopted is based on custom generators that allow rapid prototyping of the control system by minimizing the human intervention at the configuration time and ensuring an error-free application deployment. This document depicts the control system architecture, the usage of custom generators within large systems, and the integration of the software applications with a classical industrial controls architecture application.
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Slides
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| WOAA04 |
Vista Controls' Vsystem at the ISIS Pulsed Neutron Source
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284 |
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- R. P. Mannix
STFC/RAL/ISIS, Chilton, Didcot, Oxon
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The conflicting requirements and needs for a small controls team and the development and support of increasingly complex software tools may indicate a commercial SCADA solution for many facilities, even quite large ones. The experience over some years of such a solution (Vista Controls' Vsystem) for a world-leading, accelerator-based, pulsed neutron source, and its advantages and disadvantages, are discussed.
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Slides
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| WOAA05 |
Stepper Motor Control, PLC vs VME
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285 |
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- P. A. Gurd, W. H. Strong
ORNL, Oak Ridge, Tennessee
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Traditionally, EPICS-based accelerator control systems have used VME-based motion control modules to interface with stepper motors. For systems that include some Programmable Logic Controllers (PLCs), there is an option for using PLC-based stepper motor interface modules. As with all control system choices, there are trade-offs. This paper will delineate some of the pros and cons of both methods of interfacing with stepper motors.
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Slides
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