| Title |
Efficient Error Management Method in Process Control System Described by SFC Graphical Language |
| Authors |
Ho-Ik Jun ; Kwang-Joon Woo |
| Abstract |
As the highly complex and precise control functions are required in modern industrial process control system, the complex function models and developed in each hardware and software of PLC. The SFC graphical language is very powerful for describing the sequential logic control algorithm, on the other hand it has problems in describing the interlock logic control algorithm, such as error management algorithm. In this paper, we propose the efficient error management method using the action qualifiers to design the error management algorithm in industrial process control system described scheme, we realize the error management logic in process control system of film coating machine. From the experiment results, we confirm that the proposed scheme is very useful in aspects to realize easily the error management logic and to reduce the memory capacity for user"s program. |