Programmable logic controller system in neutral beam injector's ion source test stand

Due to the real-time monitoring requirement of field devices in EAST-NBI ion source test stand, this paper introduces a programmable logic controller (PLC) system based on Profibus protocol. The hardware configuration of PLC system can be determined according to the requirement of test stand, a Profibus-DP network with single-master workstation make a distributed I/O system. The PLC system can monitor the field devices' status in real time, exchange data with NBI control system and instruct field devices work stably. In addition, full graphical user interface can realize the visualization of system operation, data storage and display in real-time, which will provide a basis for experimental analysis for physical operator. The whole PLC system is reliable,reproducible, well compatible and scalable, which can be used to monitor and control the field devices in EAST-NBI test stand. (authors)