Microcomputers in process control

Abstract

This work deals with overview of the microcontrollers which are usable for the controllers based on the modem control algorithms. In this paper are described necessities of the self tuning controllers. In our applications, we are focused to the microcontrollers Motorola and National Semiconductor that are commonly used for process control. Microcontrollers were divided into two categories: 8-bit and 16-bit. In the part of the work dedicated to 8-bit microcontrollers, the properties of M68HC08 (Motorola) and COP8 (National Semiconductor) are described. The part, which deals with 16-bit microcontrollers, contains description of M68HC16 (Motorola) and CR16 (National Semiconductor). Finally has been evaluated CPU performance of selected microcontrollers in clock cycles needed for factorial computation.