Programmable controllers involved in automatic production lines

Programmable controller is a kind of controller based on sequence control and supplemented by network control. It can not only realize the functions of logic calculation and memory, but also control the switching amount on a large scale.
PLC selection is determined based on the number of I/O points. First allocate I/O points: then draw the connection diagram between PLC and input and output equipment, design the electrical layout diagram and installation wiring diagram of the control cabinet and operation console; Then the program design, including control program, initialization program, fault detection and maintenance program, status display program, protection and self-locking program; Finally, do online debugging.