New developments for real time plasma control system on HL-2A

With more and more complicated codes and control algorithm are being introduced into the plasma control system (PCS) which is a real-time, basic and complex system in HL-2A, it is becoming more and more necessary to reorganize the PCS in order to make it more flexible and effective. Some progress has been made recently for this purpose. A real time operation system that is based on Ubuntu Linux patched by Xenomai code becomes the platform for the plasma control algorithm instead of the DOS operation system at present and the platform for the plasma shape identification code in the future. The real time network consists of reflective memory (RFM) cards take the place of the signal cables for data transmitting in real time plasma control. The real time data acquisition system for plasma control is separated as a single crate where NI RT system deployed. The details of the new developments for HL-2A are described in this paper.