2. Programmable controller (PC or PLC for short) is a digitally operated electronic system, which is specially designed for application in industrial environment. It uses programmable memory to execute instructions for storing logical operations, sequence control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input (I) and output (O) interfaces.
3. Programmable logic controller is a digital operation electronic system specially designed for industrial environment application. It uses programmable memory, which stores instructions of logic operation, sequence control, timing, counting and arithmetic operation, and controls various types of mechanical equipment or production processes through digital or analog input and output.
Extended data:
Some characteristics of engineering control software;
Real-time: Some events in industrial control system are random, which requires industrial control software to deal with random events in time.
Periodicity: the industrial control software enters the main program cycle after completing the system initialization. In the process of executing the main program, if there is an interrupt application, after executing the corresponding interrupt service program, the main program cycle will continue.
Relevance: Industrial control software consists of multiple task modules, which work together, are interrelated and interdependent.
Artificiality: Industrial control software allows operators to intervene in the operation of the system and adjust the working parameters of the system.
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