THE DISTRIBUTED CONTROL SYSTEM OF COIL ANNEALING FURNACES

This paper introduces a distributed micro-computer system applied to the combustion control of batch-type annealing furnaces for cold strip coils. This system consists of 21 micro-computers : 4 supervisory, 2 interface, and 15 DDC controler. Each DDC computer has an advanced mathematical model which optimizes heat-up by predicting the internal temperatures of piled coils. By means of this system, fuel gas consumption has been reduced and the capability of process supervision and reliability have improved.