The Ssrf Control System

SSRF(Shanghai Synchrotron Radiation Facility) control system is a large hierarchical standard accelerator control system based on EPICS. The VME 64X system, special embedded controller and PLCs are used for low level devices control or interlocks system. Using a uniform 1000Base-T backbone redundancy control network instead of field bus for mostly device controller with VLAN technique adopted and integrated with EPICS using soft IOC. Digital technology such as digital power supply control system, new event timing system and digital phase control system are used and also integrated with some embedded EPICS IOC. An uniform System development and run time environment of hardware and software is adopted at the whole process. The high level physical application environment using MatLab 2007a with Accelerator Toolbox (AT) & middle layer with MatLab CA (Channel Access) connected component MCA/LabCA. The high level physical application can be integrated with the control system easily and conveniently. With the SSRF centre database, an enhanced distributed archive engine based on RDBS with native XML data type is been testing. ENVIRONMENT The development and runtime environment of control system have been set up and used during the procedure of construct and runtime. It composed with the network system, server system and OPI system. A uniform user account system with single sign-on technical is used and the developer or operator can login in on any terminal and share resource. Control System Network SSRF using the 1000Base-T control network instead of field bus for mostly device controller, like the PLC and lot of serial based device (using protocol translate: serial to Ethernet translator), most of devices are connected by the control network directly and integrate with EPICS using soft IOC. The backbone redundancy design is adopted to ensure the network reliability with 2 sets of 3 layers main switches. At the access layer, only one type of 2 layers 48 ports switch is used and all the devices are connected through it directly. Various sub systems are running on individual subnet that separated by VLAN (Virtual Local Area Network) and can flexible division and recombine on demand. Figure 1 show the schema of control system network. Uniform Running and Development Environment An uniform development environment which base on PC Linux system has been set up for the system development and operations. All of the OPI and the server system are running the fedora 7 and supply the EPICS development and high level physics application environment. NIS and NFS server are used to manage user account and share resource. As part of runtime environment, the database server, boot server, Soft IOC server and EPICS application server such archive and alarm handler are installed at the server room. In order to supply a more stable environment, the server system will move to virtual machine system at summer of this year. Several versions (from v3.13.x to v3.14.8.2) of EPICS base with cross-compiler support are installed in the runtime environment and the base 3.14.8.2 is confirmed to use at end. Except the Linux-x86 architecture, the mainly target machine we used is Motorola VME5500 and GE7050 which is defined in EPICS as architecture of ppc-604_long. Also in this environment, the EPICS extensions have been installed includes all the tools we needed. In fact, we install all the EPICS tools like sequencer, ALH, EDM, MEDM, archive engine and so on. Developer can use to development all their applications. A standard directory structure of the entire environment is defined for all users. like “/usr/local/epics/base-3.xx.xxx” for epics base, “/opt/matlab” for the MatLab. Figure 1: Main layout of control system network.