Decision support facility for the APS control system.

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Description

The Advanced Photon Source is now in its fifth year of routine beam production. The EPICS-based [1] control system has entered the phase in its life cycle where new control algorithms must be implemented under increasingly stringent operational and reliability requirements. The sheer volume of the control system ({approx}270,000 records, {approx}145 VME-based input-output controllers (IOCs), and {approx}7,000,000 lines of EPICS ASCII configuration code), presents a daunting challenge for code maintenance. The present work describes a relational database that provides an integrated view of the interacting components of the entire APS control system, including the IOC low-level logic, the physical wiring ... continued below

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3 pages

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Dohan, D. A. November 12, 2001.

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Description

The Advanced Photon Source is now in its fifth year of routine beam production. The EPICS-based [1] control system has entered the phase in its life cycle where new control algorithms must be implemented under increasingly stringent operational and reliability requirements. The sheer volume of the control system ({approx}270,000 records, {approx}145 VME-based input-output controllers (IOCs), and {approx}7,000,000 lines of EPICS ASCII configuration code), presents a daunting challenge for code maintenance. The present work describes a relational database that provides an integrated view of the interacting components of the entire APS control system, including the IOC low-level logic, the physical wiring documentation, and high-level client applications. The database is extracted (booted) from the same operational CVS repository as that used to load the active IOCs. It provides site-wide decision support facilities to inspect and trace control flow and to identify client (e.g., user interface) programs involved at any selected point in the front-end logic. The relational database forms a basis for generalized documentation of global control logic and its connection with both the physical I/O and with external high-level applications.

Physical Description

3 pages

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  • 8th International Conference on Accelerator and Large Experimental Physics and Control Systems (ICALEPCS 2001), San Jose, CA (US), 11/27/2001--11/30/2001

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  • Report No.: ANL/ASD/CP-105025
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 792124
  • Archival Resource Key: ark:/67531/metadc741415

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  • November 12, 2001

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • March 11, 2016, 6:22 p.m.

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Dohan, D. A. Decision support facility for the APS control system., article, November 12, 2001; Illinois. (digital.library.unt.edu/ark:/67531/metadc741415/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.