The 2422-OUT2422 processor module, also known as the central processing unit (CPU) module, is the core part of the programmable controller (PLC). It is mainly composed of a microprocessor (CPU chip) and memory, which is used to execute PLC system programs and user programs, and complete various logical operations, arithmetic operations, and other control functions. The CPU module receives and stores user programs and data input from the programmer or other external devices. It is also responsible for checking the status of power supply, memory, I/O modules and watchdog timers, and can diagnose syntax errors in user programs. In addition, the CPU module updates the status of relevant flag bits and the contents of the output status register according to the operation results, and implements functions such as output control, tabulation printing, and data communication through the bit status of the output status register or the contents of the data register. The 2422-OUT2422 processor module (CPU module) is the brain and heart of the programmable controller. It is responsible for processing various data and control signals to achieve precise and reliable control functions.