  After the CSNS ion source test stand has been stably working for years, an
online control system for CSNS ion source aiming to be more stable and reliable
is now under development. F3RP61-2L, a new PLC CPU module under Linux system,
is introduced to the system as an IOC, to function together with the I/O
modules of FA-M3 PLC on the PLC-bus. The adoption of the new IOC not only
simplifies the architecture of the control system, but also improves the data
transmission speed. In this paper, the design and development of the
supervisory and control system for CSNS ion source are described.
