1. 2002-08-21EPICS Seminar at IHEP1 Some Experiences on Choosing Standards at KEK KEKB Controls Group 2002-08-21 by Tadahiko Katoh

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 PS30 years - TRISTAN10 years - KEKB10 - 20 years

8. Life of the Control Systems - Electronic Equipment10 - 20 years - Consumer Electronics 7 years - Electronic Components10 - 20 years -IC’s(Supply)20 years -Electrolytic Capacitors10 years -Connectors - VME Modules10 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!