  The injection control system of Hefei Light Source (HLS) storage ring is a
subsystem of the upgraded HLS control system, which is based upon EPICS. Three
programmable logic controllers (PLCs) are used as device controllers, which
control one septum modulator and four kicker modulators of HLS storage ring. An
Industrial PC is used as Input/Output Controller (IOC) and it connects the PLCs
with serial communication (RS232 mode) over fibre. A PC with Linux is used as
operator interface (OPI), operator application are running on it. The control
system was completed in July 2000. The commissioning shows that the control
system is reliable and easy operational.
