The prototype of equipment protection system based on Ethernet POWERLINK for HALS

Abstract

Abstract The Hefei Advanced Light Source (HALS) is brought forward to be a new diffraction limited storage ring (DLSR) light source. The technical pre-research project for the HALS is in progress. As an critical part of the project, a prototype of the equipment protection system (EPS) is developed to study the interlock protection for components of the light source. The prototype of the EPS is a distributed system based on Gigabit Ethernet POWERLINK (EPL) under EPICS architecture. A PC is used as the master managing node (MN), and 10 FPGA-based controllers is employed for the slave controlled nodes (CNs). EPL is used for the communication between the MN and CNs. This paper reports the design and results of a series of performance tests of the prototype system. The test results indicate that the prototype system can run stably with a communication cycle time 275 μ s , and the maximum global response time is about 870 μ s . This system is a feasible solution for the EPS of large-scale scientific facilities. In the further studies, the response time is expected to be further reduced by choosing high-speed photo couplers and properly arranged input signals.