Programmable controller software aluminium hot mill spray control

The details of the methods used in programming a programmable logic controller (PLC) system for improving the roll cooling control on a three-stand aluminium rolling hot finishing mill with a coolant spray system for work roll temperature control of narrow zones across the width of the work rolls are discussed. The operator functions, the programmable controller´s handling of data, the program structure, and a detailed description of the program for controlling the sprays are described.<>