Computer Automation in Manufacturing: An introduction by Thomas O. Boucher

By Thomas O. Boucher

o computing device Automation in production supply guideline in machine structure, interfacing to mechanical structures, and software program improvement for non-stop keep an eye on and discrete occasion platforms. this can be entire by means of featuring theoretical fabric and hands-on laboratory experiments.

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The registers described above, the program counter, memory address register, memory data register, instruction register, and accumulator, execute a repetitive cycle of events which will be described in some detail in the next section. Sometimes that cycle of events is broken or interrupted in order for the machine to perform some other function. For example, a controller may be 37 38 I LI__A_R_C_H_IT_E_C_T_U_R_E_O_F_M_I_C_R_O_P_R_O_C_E_S_SO_R_-_B_A_S_ED_S_Y_ST_E_M_S_--, performing the task of repetitively collecting sensor information at an input and storing that information in memory.

In what follows we will discuss the functions of the microprocessor-based system itself, introducing the concepts we have just learned as needed to describe some specific operations. 6 AN OVERVIEW OF THE ARCHITECTURE AND OPERATIONS OF A MICROPROCESSOR-BASED SYSTEM A discussion of the architecture and operation of a microcomputer is a good vehicle for introducing the general class of programmable microprocessorbased systems, including programmable controllers. Although there are differences based on manufacturer's specifications, we can describe the fundamentals of a typical microcomputer using the block diagram of Fig.

1 Relationship between decimal and binary numbers Decimal Number o 1 2 3 4 5 10 Decimal Components Ox 10° 1 x 10° 2 x 10° 3 x 10° 4 x 10° 5 x 10° lxl0 1 +OxlO° Equivalent Binary Number o 1 10 11 100 101 1010 Binary Components Ox 2° 1 x 2° 1 X 21 + 1 X 21 + 1 X 22 + 1 X 22 + 1 X 23 + 0x 1x 0X 0X 0X 2° 2° 21 + 0 x 2° 21 + 1 x 2° 22 + 1 X 21 + 0 x 2° NUMBER SYSTEMS AND LOW-LEVEL COMPUTER LANGUAGES II Decimal to binary conversion requires the inverse operation. Returning to the general format of a number system, we note: For example: To find the binary equivalent of a decimal number we note: (((d"b+d"-1)b ...

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