This document introduces the debugging method of SIMATIC automation system S7-300 CPU 31x, including using analog output positioning, using digital output positioning, counting, point-to-point link, closed-loop control, etc.

This manual provides basic information on the CPU 31xC and CPU 31x, including installation, communication, storage principles, cycle time and response time, and the technical specifications of the CPU.

The SIMATIC S7-200 series PLC is suitable for automation of detection, monitoring, and control in various industries and scenarios. The series offers powerful functionality, allowing for complex control tasks, and provides an excellent performance-to-price ratio.

The Siemens STEP 7 V5.4 programming manual introduces how to use STEP 7 for programming, installing and debugging software, and explains how to create programs and explains the user program components. This manual is suitable for those who use STEP 7 and SIMATIC S7 automation systems to implement control tasks.

The SIMATIC S7-300 programmable logic controller is a modular small to medium-sized PLC system suitable for applications with medium performance requirements. It features a wide range of functional modules and a decentralized structure, making it flexible for various automation tasks. The controller has a user-friendly design and supports multiple interface networking, providing convenience for users. It also supports easy expansion and offers powerful functionality, making it a robust controller.