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Some Experiences on Choosing Standards at KEK

Some Experiences on Choosing Standards at KEK. KEKB Controls Group 2002-08-21 by Tadahiko Katoh. Control Systems at KEK. KEK PS Control System TRISTAN Control System Renewed KEK PS Control System KEKB Control System. Standard used in PS Control System. System Design started in 1972

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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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