Abstract: In the control system of HAUNI FLC,the communication among filter shooters,FLC and filter receivers is carried out by a group of 7-core communication cables.The operator can not get any information about pipe connection at site,and there is no sign if a receiver is fed from a wrong shooter.Therefore,the cable communication was replaced by a standard industrial Ethernet,in which connection relationship between shooter and receiver is set at the operation terminal interface and displayed to guide and inspect shooter-receiver connecting.The other benefits of the new system include ease of maintenance,operation,extension and lower cost.