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Some Experiences on Choosing Standards at KEK

This seminar by Tadahiko Katoh in 2002 discusses the history of standard selection at KEK/KEKB Controls Group, highlighting systems used and their lifespans, successes and pitfalls of standards like CAMAC and VMEbus, and tips for choosing the right standards.

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Some Experiences on Choosing Standards at KEK

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  1. Some Experiences on Choosing Standards at KEK KEKB Controls Group 2002-08-21 by Tadahiko Katoh EPICS Seminar at IHEP

  2. Control Systems at KEK • KEK PS Control System • TRISTAN Control System • Renewed KEK PS Control System • KEKB Control System

  3. Standard used in PS Control System • System Design started in 1972 • Standards adopted • RS-232C • Proprietary Systems • Network • Process Input/Output

  4. Standards used in TRISTAN Control System • Design started in 1981 • Standards used • CAMAC Serial Highway(IEEE 596) • CAMAC Dataway(IEEE 483) • GPIB(IEEE 488) • MIL-1553B • RS-232C • Proprietary System • Computer Network

  5. Standards used in Second Generation PS Control System • Renewal started in 1985 • VMEbus(IEEE 1014) • Direct I/Os on VMEbus • MAP(IEEE 801.4) • Broadband Token-Bus Network • CATV and Computer Network on one Coaxial Cable • GPIB(IEEE 488) • RS-232C

  6. Standards in KEKB Control System • Design Started 1993 • VMEbus(IEEE 1014) • CAMAC(IEEE 596) • CAMAC(IEEE 483) • GPIB(IEEE 488) • FDDI • Ethernet(IEEE 801.2, 801.11) • 10 Base/T --> 100 Base/TX --> GbE

  7. Life of the Accelerators • KEK PS 30 years • TRISTAN 10 years • KEKB 10 - 20 years

  8. Life of the Control Systems • Electronic Equipment 10 - 20 years • Consumer Electronics 7 years • Electronic Components 10 - 20 years • IC’s(Supply) 20 years • Electrolytic Capacitors 10 years • Connectors • VME Modules 10 years • Semiconductor Manufact. 5 years

  9. Results of the Standards • CAMAC(IEEE 483, IEEE 596) • Very simple and clear standard • Still widely used over the world • But careful design of the modules are required • Parts especially SSI or MSI are obsolete • VMEbus(IEEE 1014) • Very widely used • Will not be replaced by Compact PCI bus

  10. Results of the Standard(2) • MAP(IEEE 801.4) • Highly dependent on the automobile industry(General Motors) • No second source of modules • FDDI • It was a smart network standard • Expensive interface as ATM • Going to be obsolete in a few years • Replaced by Switched Ethernet

  11. Results of the Standard(3) • GPIB(IEEE 488) • Widely used in Measuring Equipment • Optical Interface • Ethernet Interface • Behavior of the equipment is not always unpredictable • Ethernet(IEEE 801.2, 801.11) • High Speed: 100 Base, Gb, 10 GbE • Wireless: 801.11a, 801.11b • RS-232C, RS-485, RS-422/423 • Physical Layer

  12. How to Choose a Standard • Wait a little until the standard is widely used. • A good standard is not always used widely. • Don’t believe what a manufacturer announces. • Check a module carefully before you decide to use. • A manufacturer will never be your side even if you are a good customer.

  13. Standards that may be used Now • Ethernet(IEEE 801.2, 801.11) • GbE, 100 Base/TX, 10 Base/T • GPIB(IEEE 488) • You may use a GPIB equipment if it satisfies your requirements. Use with Ethernet. • CAMAC(IEEE 483, 596) • If you have already have CAMAC modules • VME(IEEE 1014), VME64

  14. Thank you for your attention!

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