The control system of HLS

HLS (Hefei Light Source) at NSRL (National Synchrotron Radiation Lab) consists of three parts, 200 MeV Linac, transport line and 800 MeV storage ring. The control system is based on EPICS (Experimental Physics and Industrial Control system). In this system, PC-based hardware is widely used for front-end controllers (FDC), Input/Output Controllers (IOC) and Operator Interfaces (OPI). A number of Programmable Logic Controllers (PLC) and SUN workstations are also used in the control system. This paper will cover the experience of using PC-based hardware under EPICS, the field bus used in HLS control system, data archiving, communication, and some analysis tools for physics and operation use.