This manual introduces the CJ-series built-in I/O CJ1M-CPU22/CPU23. It contains information on the composition, operation and installation of the units.
The manual provides safety and general precautions for handling the CJ1M CPU units, defines symbols such as DANGER, WARNING and Caution, and outlines the intended audience and operating environment. It also clarifies terminology used throughout the document, such as PLC for Programmable Controller.
The contents are organized into sections covering features, an overview of built‑in I/O functions, V/O specifications and wiring instructions, data area allocation and PLC setup settings, detailed built‑in I/O function descriptions, programming examples, and appendices with pulse control instruction tables and interrupt response times.