Abstract
This paper gives some examples of the control systems currently operating in the paper and cement industries where CONRAD software is in use. While the primary concern is to show how the various strategies that are required on applications are implemented with CONRAD software, control strategies themselves may be of some interest.
The main advantages of digital computer regulation on the majority of processes lie not in the direct replacement of functions, which can be performed by three term analogue controllers, but rather in implementing the type of control that cannot be tackled satisfactorily by analogue control equipment. This includes feedforward, feedback, and multivariable non-interactive control on processes with long time scales and complex transfer functions, particularly where dead times or transport delays are involved.
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