Upgrade Plan For The Nsrl Control System

The control system of Hefei National Synchrotron Radiation Laboratory (NSRL) was designed in 1983 and completed in 1990. In the present system, the device controller is a MULTIBUS-I based system with 8085 processors, which is star-networked to the high level computer through a communication controller. An 80486 PC is used for both high level control and operator interface.The upgrade of NSRL control system will start at the end of 1997 and last about 3 years. The new control system will be EPICS based, following the standard model, i.e. I/O controllers (IOC) communicating via Ethernet with operator interface workstations (OPI). Both MVME162 and PC will be used as IOCs and CANbus will be used for the communication between IOCs and the device controllers.