# Presentation: 407863

## Some Experiences on Choosing Standards at KEK

**KEKB Controls Group**
**2002-08-21**
**by Tadahiko Katoh**

- EPICS Seminar at IHEP

- 2002-08-21

## Control Systems at KEK

**KEK PS Control System**
**TRISTAN Control System**
**Renewed KEK PS Control System**
**KEKB Control System**

- EPICS Seminar at IHEP

- 2002-08-21

## Standard used in PS Control System

**System Design started in 1972**
**Standards adopted**
**RS-232C**
**Proprietary Systems**
**Network**
**Process Input/Output**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## Life of the Accelerators

**KEK PS****	****	****30 years**
**TRISTAN****	****	****10 years**
**KEKB****	****	****	****10 - 20 years**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## 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 **

- EPICS Seminar at IHEP

- 2002-08-21

## 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.**

- EPICS Seminar at IHEP

- 2002-08-21

## 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**

- EPICS Seminar at IHEP

- 2002-08-21

## Thank you for your attention!

**Thank you for your attention!**

- EPICS Seminar at IHEP

- 2002-08-21