The manual begins with safety precautions, distinguishing between "危险" (danger) and "小心" (caution) levels, and outlines design considerations for connecting external devices, establishing interlocks, and avoiding prohibited signals. It also covers operational warnings for modifying PLC data, programs, or states.
Subsequent sections provide a comprehensive overview of the MELSEC communication protocol, including frame types (3E, 3C, 4C), command lists, CPU access timing, file control commands, mode switching procedures, and appendices with detailed command tables and examples. This manual is written in Chinese.
It indicates that an error may cause disastrous consequences, including death or serious injury.