PLC capability in handling analog and digital computing power

The mid-1980s to the 1990s, is the fastest growing PLC period, the annual growth rate has been maintained at 30 to 40 percent. During this period, PLC capability in handling analog and digital computing power,plc IO module man-machine interface capabilities and network  industrial plc  capabilities have been greatly improved, PLC gradually entering the field of process control, in some applications in the field of process control to replace the dominant DCS systems.
PLC has the versatility, plc temperature control module  ease of use, wide adaptation, can be * high anti-jamming capability, programming and simple. PLC in the industrial automation and control especially in order to control the position, in the foreseeable future, can not be replaced.　

plc as general industrial control computer

PLC as general industrial control computer, industrial and mining-oriented industrial equipment. It is easy interface, output module plc the programming language is easy for engineering and technical personnel to accept. Ladder language graphic symbol and expression and relay circuit is very close, with only a small pulse input module plc  switch on the PLC logic control instructions can easily achieve the function relay circuit. Is not familiar with the electronic circuits, computers do not understand the principles and assembly language people use computers in industrial control Plc high speed counting modules  to open the door. System design, construction workload is small, easy to maintain, easy to transform PLC logic instead of using store-wired logic, greatly reducing the external control equipment wiring, the control system design and construction period is much shorter, but also becomes easier to maintain. More important is to change the program of the same device has been possible to change the production process. It is suitable for many varieties, small batch production applications.

CPU mainly by the operator, controller

CPU mainly by the operator, controller, register and data connections between them, control and status bus constituted, plc cpu modules CPU unit also includes a peripheral chip bus interface and related circuitry. The main memory used to store programs and data, communication modules plc  is an indispensable component PLC unit.
In the user view,input module plc unnecessarily detailed analysis of the internal circuitry of the CPU, but each part is working mechanism should be enough to understand.

PLC is operated electronic digital computing device specifically

PLC is operated electronic digital computing device specifically for applications in industrial environments and design. It uses a memory can be programmed and used in the instruction execution logic  plc soe module  of its internal memory, sequential operation, timing,input module plc high speed counter plc and arithmetic operations, plc module high speed user-oriented instruction counter plc and arithmetic operations, etc., and various types through digital or analog input / output control of machinery or production processes. programmable logic controller and related peripherals, are easy and industrial control systems together into a whole, to expand the principles of the design of its functions.