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EPICS TutorialExperimental Physics and Industrial Control System(EPICS)EPICS Tutorial: Overview 1 Sept, 1998./D. Barker, TJNAF.& S. Lewis, LBNLIntroduction to EPICSThe EPICS toolkit consists of a set of software components with which ApplicationDevelopers can create a control system. The basic component types are:• OPI Operator Interface. A UNIX- or NT-based workstation or PC whichcan run various EPICS tools—the “clients.”• IOC Input Output Controller. A VME/VXI-based chassis containing aMotorola 68K or PPC processor with various VME I/O modules foranalog and digital signals, and for access to field buses such as Allen-Bradley, GPIB, CANbus or CAMAC.• LAN TCP/IP-based Local Area Network. A communication networkwhich connects the IOCs and OPIs. EPICS provides a software com-ponent, Channel Access, which provides network transparent commu-nication between every client—such as OPI—and an arbitrary numberof servers—such as IOC.OPIOPI OPILANIOC IOCEPICS Tutorial: Overview 2 Sept, 1998./D. Barker, TJNAF.& S. Lewis, LBNLEPICS Attributes• Tool Based EPICS provides a number of tools both for creating and also foroperating a control system. This minimizes the need for customcoding and helps ensure uniform operator interfaces.• Distributed An arbitrary number of IOCs and OPIs can be supported. If a singleIOC becomes saturated, its functions may be spread over severalIOCs.• Event Driven Network loading and message latency are simultaneously mini-mized ...