Application of Modbus-TCP in TPS Control System

Modbus-TCP is a widely used in industry for a long time and slow-control devices in accelerator control system recently. Modbus protocol over Ethernet has advantages for non real-time applications due to its maturity. The TPS (Taiwan Photon Source) project will have some Modbus-TCP enabled devices which are distributed in utility facilities and accelerator system. The accelerator control environment of TPS project is an EPICS based system. Modbus-TCP might be adopted for some subsystems. There are several possible ModbusTCP available devices: the prototype power supply for magnet field mapping application, vacuum system local controller, beam line front-end controller, and some monitoring devices. In this paper, we will summarize preparation efforts to accommodate the Modbus-TCP support in the TPS control system.