| Paper | Title | Page |
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| S14OOP01 | Object-Oriented Programming Techniques for the AGS Booster | 500 |
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Funding: Work performed under the auspices of the U.S. Department of Energy. The applications software developed for the control system of the AGS Booster Project was written in the object-oriented language, C++. At the start of the Booster Project, the programming staff of the AGS Controls Section comprised some dozen programmer/analysts, all highly fluent in C but novices in C++. During the course of this project, nearly the entire staff converted to using C++ for a large fraction of their assignments. Over 100 C++ software modules are now available both for Booster and general AGS use, of which a large fraction are broadly applicable tools. The transition from C to C++ from a managerial perspective is discussed and an overview is provided of the ways in which object classes have been applied in Booster software development. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP01 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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| S14OOP02 | A Simplified Approach to Control System Specification and Design Using Domain Modelling and Mapping | 505 |
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| Recent developments in the field of accelerator-domain and computer-domain modelling have led to a better understanding of the "art" of control system specification and design. It now appears possible to "compile" a control system specification to produce the architectural design. The information required by the "compiler" is discussed and one hardware optimization algorithm presented. The desired characteristics of !he hardware and software components of a distributed control system architecture are discussed and the shortcomings of some commercial products. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP02 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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| S14OOP03 | The Direct Manipulation Shell: Creating Extensible Display Page Editors | 511 |
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Accelerator controls systems provide parameter display pages which allow the operator to monitor and manipulate selected control points in the system. Display pages are generally implemented as either hand-crafted, purpose-built programs; or by using a specialized display page layout tool. These two methods of display page development exhibit the classic trade-off between functionality vs. ease of implementation. In the Direct Manipulation Shell we approach the process of developing a display page in a manifestly object-oriented manner. This is done by providing a general framework for interactively instantiating and manipulating display objects.
Operated by the Universities Research Association, Inc., for the U.S. Department of Energy under Contract No. DE-AC02-89ER40486. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP03 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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| S14OOP04 | Object Oriented Programming Techniques Applied to Device Access and Control | 514 |
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| Device access and device control is one of the most important tasks of any control system. This is because control implies obtaining information about the physical world by reading sensors and modifying the behaviour of the physical world by sending commands to actuators. At the European Synchrotron Radiation Facility (ESRF) effort has gone into designing and implementing a model for device access and control using as much as possible the latest ideas and methods of Software Engineering. One of the main contributions in recent years to Software Engineering has been in the field of Object Oriented Programming (OOP). Although the philosophy is not new the refinement and application of this methodology on a wide scale is. At the ESRF a model for device access and control has been developed which is based on OOP methods. This model, called the device server model, is the topic of this paper. The device server model is written entirely in C and is therefore portable. It depends on no other software and can be ported to any machine where there is a C compiler. Because the model is based on OOP it presents a user-oriented view of the world as opposed to a software- or hardware-oriented view of the world. This paper will describe the device server model. It will describe the problem of device access and the advantages of using OOP techniques to solve it. It will present the model. The methodology used to implement OOP in the device server model called Objects In C (OIC) will be described. An example of a typical device server at the ESRF will be presented. The experience gained from the device server model will be discussed. The paper will conclude with a discussion on how the device server model could be standardised to treat a wider range of problems. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP04 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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| S14OOP05 | An Object-Oriented Implementation of the TRIUMF 92 MHz Booster Cavity Control System | 520 |
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| A 92 MHz auxiliary accelerating cavity has been designed for installation inside the 1RIUMF cyclotron, operating up to a maximum peak voltage of 200 kV. The cavity doubles the energy gain per turn for accelerating hydrogen ions in the energy region of 400-500 MeV, and reduces by 50 % the stripping loss of the ion beam. The control system for the booster comprises a PC-based processor in a VME crate, for local control, and a 68030 processor with an Ethernet connection as the interface to the TRIUMF Central Control System. The requirements for the booster control system were established by an object-oriented requirements analysis. Afterward, an object-oriented architectural design step was used to produce the processor allocation of the design, which was then implemented using C, for the VME processor, and a commercial database and screen generator product, for the VAX user interface. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP05 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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| S14OOP06 | The State Manager: A Tool to Control Large Data-Acquisition Systems | 524 |
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| The State Manager system (SM) is a set of tools, developed at CERN, for the control of large data-acquisition systems. A dedicated object-based language is used to describe the various components of the data-acquisition system. Each component is declared in terms of finite state machines and sequences of parametrized actions to be performed for operations such as the start and end of a run. The description, written by the user, is translated into Ada to produce a run-control program capable of controlling processes in a distributed environment A Motif-based graphical interface to the control program displays the current state of all the components and can be used to control the overall dataa-cquisition system. The SM has been used by several experiments both at CERN and other organizations. We present here the architecture of the SM, some design choices, and the experience acquired from its use. | ||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S14OOP06 | |
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | |
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