The performance of the chip is directly related to the ability and speed of PLC processing control signals, the more bits of the chip, the faster the computing speed, the more information the system processes. With the rapid development of CPU chip technology, the CPU chip used by PLC is becoming more and more high-end.
In some large industrial applications with high reliability requirements, the dual CPU structure is used to form a redundant system. This way, even if one CPU fails, the whole system can still run normally.