I/O subnets for the APS control system

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Although the Advanced Photon Source Control System allows for microprocessor -- based Input/Output Controllers (IOCs) to be distributed throughout the facility, it is not always cost effective to provide such capability at every location where an interface to the Control System is required. I/O subnets implemented via message passing network protocols are used to interface points and/or equipment to a somewhat distant IOC, thereby reducing the number of required IOC's and minimizing the field wiring from the equipment to the Control System. For greatest flexibility, the subnets must support connections to equipment that requires several discrete I/O points, connections to ... continued below

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Pages: (4 p)

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Arnold, N.D.; Nawrocki, G.J.; Daly, R.T.; Kraimer, M.R. & McDowell, W.P. January 1, 1991.

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Description

Although the Advanced Photon Source Control System allows for microprocessor -- based Input/Output Controllers (IOCs) to be distributed throughout the facility, it is not always cost effective to provide such capability at every location where an interface to the Control System is required. I/O subnets implemented via message passing network protocols are used to interface points and/or equipment to a somewhat distant IOC, thereby reducing the number of required IOC's and minimizing the field wiring from the equipment to the Control System. For greatest flexibility, the subnets must support connections to equipment that requires several discrete I/O points, connections to GPIB and RS232 instruments, and a network connection to custom designed intelligent equipment. This paper describes an approach that supports all of the interfaces with one subnet implementation, BITBUS. In addition to accommodating several different interfaces on a single subnet, this approach also circumvents several limitations of GPIB and RS232 which would otherwise restrict their use in a harsh, industrial environment. 1 ref., 1 fig.

Physical Description

Pages: (4 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991

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  • Other: DE91011994
  • Report No.: ANL/CP-73042
  • Report No.: CONF-910505--42
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5724420
  • Archival Resource Key: ark:/67531/metadc1092656

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 18, 2018, 12:20 p.m.

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Arnold, N.D.; Nawrocki, G.J.; Daly, R.T.; Kraimer, M.R. & McDowell, W.P. I/O subnets for the APS control system, article, January 1, 1991; Illinois. (digital.library.unt.edu/ark:/67531/metadc1092656/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.