Uchiyama, A. Fukunishi, N. Komiyama, M. Kumagai, K. JACoW Publishing Geneva, Switzerland 2673-5482 978-3-95450-212-7 10.18429/JACoW-CYCLOTRONS2022-TUBO04 English 134-137 controls Ethernet EPICS power-supply network Contribution to a conference proceedings 2023 2023-10 https://doi.org/10.18429/JACoW-CYCLOTRONS2022-TUBO04 https://jacow.org/cyclotrons2022/papers/tubo04.pdf In the Radioactive Isotope Beam Factory (RIBF), a front-end controller consisting of a computer automated measurement and control (CAMAC)-based system and I/O devices are utilized for the power supplies of many electromagnets upstream from the RIKEN RING Cyclotron. The CPU installed in the system is an x86-based CAMAC crate controller known as "CC/NET". An experimental physics and industrial control system (EPICS) input/output controller (IOC) running embedded Linux is used to remotely control the electromagnet power sup-plies. However, these CAMAC-based systems are outdated and require replacement. The FA-M3 programmable logic controller (PLC) is an alternative candidate device that can be incorporated into the magnet power supply. However, a high-reliability network between the EPICS IOC and the device is required compared to a conventional socket connection via Ethernet. Therefore, we evaluated a system that uses EtherNet/IP to communicate between these devices and the EPICS IOC. The Ether-Net/IP system is based on the TCP/IP protocol, which is widely used for field bus communications via Ethernet. An advantage of using EtherNet/IP is that it enables cost-effective reliable communication despite the use of TCP/IP. It is possible to improve the reliability of the interlock output even when using conventional TCP/IP-based network.