Design of the machine interlock system for Korea-4GSR

MIS (Machine Interlock System) for Korea-4GSR is a system designed to prevent operations that may cause damage to related devices when faults occur in any of the devices configured throughout the accelerator during its operation. It is an essential system of accelerator operation. In the MPS (Machine Protection System), MIS mainly covers signals with relatively slow response speeds among various classifications of signals. For signals generated by an interlock situation, which are recognized by the central device from local devices and transmitted to the final destination, differences in speed exist depending on the route. However, MIS is designed with minimized signal routes so that the difference in speed by signal will be minimal. The controller of MIS is a PLC (Programmable Logic Controller), which is widely used in various fields of industry and experimental physics. Since various PLC guidelines are provided for securing system reliability and responding to failures, configuring a more robust system is more accessible with PLC than with other types of controllers. This poster presents the design to minimize beam downtime due to device faults and maximize device protection.