1. Data flow: Main operation: From operation mode program via file operators to file operator servers Trigger generator: Trigger information will be distributed to all machines Update trigger: From radio servers to all update servers, distributes common information of the machine Update: Each update server sends by broadcast all its relevant data to be caught by different console Programs Archivation Linac-2 / PIA Machine Operation Mode Program With the operation Mode Program it is possible to switch the three accelerators to the machine modes: Doris e+, Petra e- and Petra e+. All machine device groups are simultaneously prepared for the new mode by the file operator of Linac-2 and Desy-2. To synchronize the machines the cycle generator is loaded with a new machine program. Injection from Linac-2 to Desy The PC Control System for Linac-2, PIA and Desy-2 DESY-2 LINAC-2 / PIA Synchrotron Magnets Correction CoilsSepta/Kickers/TimingRF-TransmitterTarget Steering Monitors Subsystems (Vacuum, Pilotherms, Temperature) for Linac-2, Desy-2 and PIA Monitors Feedback Chopper RF - Transmitters for PIA and Linac-2 Septa / Kickers / Timing Correction Coils Main Magnets Device manager for synchrotron magnets Device manager for correction coils Device manager for septa/kickers Device manager for RF transmitter Device manager for trigger modules Device manager for RF transmitter Device manager for monitors Device manager for trigger modules E.g.: W.Gerhardt, U.Glöer, K.Hinsch, G.Mann, F.Wedtstein, Desy Hamburg Scopes Trigger Device manager for main magnets Device manager for correction coils Device manager for septa/kicker Device server programs for file operation Device server programs for update and operation Middle layer server Service programs which operate a single kind of device Console programs which operate on several kinds of devices Semi automatic operation Automatic operation 7 GeV synchrotron for electrons and positrons, preaccelerator for the storage rings Doris (source for synchrotron radiation for Hasylab) and Petra (preaccelerator for Hera e- / e+, source for synchrotron radiation for Hasylab ) 450 MeV linear accelerator for electrons and positrons with the intensity accumulator PIA and beam-pass L-Weg injector for the synchrotron Desy-2 Operation Mode File Operator Linac-2, PIA, L-WegFile Operator Desy-2 Ejection from Desy-2 to PETRA Linac-2 Error Messages Desy-2, Linac-2 Alarms L-Weg Operation Linac-2 and PIA Operation Desy-2, Linac-2 Vacuum Valves Desy-2, Linac-2 Vacuum Pumps Data flow: Special operating : Some console programs communicate with many different kinds of device servers Alarms and Errors: From update servers via middle layer servers to special console programs for alarms and errors Not shown: Service programs: Each set of device servers communicate with its service console program (device manager) Device server programs for file operation Device server programs for update and operation Middle layer server Service programs which operate a single kind of device Console programs which operate on several kinds of devices Semi automatic operation Automatic operation Cycle Generator Archivation Desy-2