Based On PLC, Industrial Control Experiment System Research

PLC (programmable logic controller) is a specialized in industrial environments application and design of digital computing operations electronic devices. It used can programming memory, in its internal storage used to perform the logic operation, order computation, timing, counting and arithmetic operation instruction, and can through digital or analog input and output, control the various types of machinery or manufacturing process. In recent years the PLC functional unit that emerge in a large amount, make PLC permeated position control, temperature control, CNC and other industrial control. Add PLC communication ability strengthens and human-computer interface technology development, the use of PLC control system composed of various very easily. Programming languages and easier to understand. PLC with storage logic instead of wiring logic, greatly reducing the control equipment external connection, make the control system design and construction of the cycle is much shorter, while maintaining also becomes easier.In industrial control environment, by PLC, frequency converter and man-computer exchange equipment together constitute production control system. At present, the automatic control of PLC has become the core and key, because automatic control relates directly to the whole project and equipment technology advanced, reliability, operation and maintenance costs and the number of major issues such as, its importance has been universally acknowledged and affirmation, so the importance of PLC was also increasing.In this case, will practical PLC training device introduced into the school has become very urgent. Based on PLC experiment system design, full text studied emphatically PLC control system, analyzes the general design thought of the recent development status, PLC compared the domestic present situation, and use of PLC to control systems hardware made detailed research, finally selecting typical case to verify the feasibility of the system.