Allen Bradley Instructions (PLC)

From the very start of the use of machinery in industry, the demand of machine controls and automation is increasing day by day and demanding more complex systems. Earlier machines were controlled by mechanical means using cams, gears, leavers and other basic mechanical devices. These mechanical control systems were having lots of wear and tear and require large power for operation. Large and complex control systems were not possible to be designed using mechanical systems. Mechanical control s ...