dorsal/arxiv
View SchemaDecision Support System for the APS Control System
| Authors | D. A. Dohan |
|---|---|
| Categories | |
| ArXiv ID | physics/0111084 |
| URL | https://arxiv.org/abs/physics/0111084 |
| Journal | eConf C011127 (2001) WEDT001 |
Abstract
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 (~270,000 records, ~145 VME-based input-output controllers (IOCs), and ~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.
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"abstract": "The Advanced Photon Source is now in its fifth year of routine beam\nproduction. The EPICS-based [1] control system has entered the phase in its\nlife cycle where new control algorithms must be implemented under increasingly\nstringent operational and reliability requirements. The sheer volume of the\ncontrol system (~270,000 records, ~145 VME-based input-output controllers\n(IOCs), and ~7,000,000 lines of EPICS ASCII configuration code), presents a\ndaunting challenge for code maintenance.\n The present work describes a relational database that provides an integrated\nview of the interacting components of the entire APS control system, including\nthe IOC low-level logic, the physical wiring documentation, and high-level\nclient applications. The database is extracted (booted) from the same\noperational CVS repository as that used to load the active IOCs. It provides\nsite-wide decision support facilities to inspect and trace control flow and to\nidentify client (e.g., user interface) programs involved at any selected point\nin the front-end logic. The relational database forms a basis for generalized\ndocumentation of global control logic and its connection with both the physical\nI/O and with external high-level applications.",
"arxiv_id": "physics/0111084",
"authors": [
"D. A. Dohan"
],
"categories": [
"physics.acc-ph"
],
"journal_ref": "eConf C011127 (2001) WEDT001",
"title": "Decision Support System for the APS Control System",
"url": "https://arxiv.org/abs/physics/0111084"
},
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