S7-200_e编程指南：从入门到高级功能

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本S7-200_e操作手册是一份详尽的指南，针对Siemens S7-200系列微控制器的用户。它旨在帮助用户安装、配置和有效地利用S7-200 MicroPLC，以及其配套的编程软件STEP7-Micro/WIN。手册涵盖了多个关键章节： 1. ** Preface**：这部分可能介绍了手册的目的、版本信息以及对读者的使用建议，确保用户理解安全须知并遵循操作流程。 2. ** Contents**：详细列出手册结构，包括从安装设备到高级编程概念的所有部分，便于快速查找所需信息。 3. ** Introducing the S7-200 MicroPLC**：简要介绍S7-200系列微控制器的基本特性，可能包括其功能、性能指标和适用的应用场景。 4. ** Installing an S7-200 MicroPLC**：具体步骤指导如何正确安装硬件，包括电源连接、电缆布线等，确保设备稳定运行。 5. ** Installing and Using STEP7-Micro/WIN Software**：这部分详细说明了编程软件的安装和配置方法，以及如何创建、编辑和调试程序。 6. ** Getting Started with a Sample Program**：通过一个实例项目，让读者了解如何在实际任务中编写和运行S7-200的程序。 7. ** Additional Features of STEP7-Micro/WIN**：涵盖软件的高级功能，如图形化编程、在线诊断工具等，提升编程效率。 8. ** Basic Concepts for Programming an S7-200 CPU**：介绍了编程基础，如梯形图（STL）、功能块图（FB）等编程语言的原理和使用。 9. ** CPUMemory: Data Types and Addressing Modes**：解释了CPU内存的组织结构，以及如何定义和访问不同数据类型和地址模式。 10. ** Input/Output Control**：重点讲解如何处理输入输出信号，包括模拟量和数字量控制，以及中断处理。 11. ** Network Communications and the S7-200 CPU**：涉及工业网络通信，如Profinet、MPI等接口的使用，以及远程监控和数据交换。 12. ** Instruction Set**：提供了S7-200指令集的详细描述，包括每个指令的功能、语法和应用场合。 13. ** Appendix**：包含各类附加资料，如数据表、错误代码列表、特殊内存位的使用说明、与其他STEP7产品的集成指南、指令执行时间参考以及产品型号清单和故障排查指南。 14. ** Safety Notices**：强调操作过程中应注意的安全事项，涉及警告三角标识的危险等级分类。这份S7-200_e操作手册是工程师进行S7-200项目开发、维护或升级时的重要参考资料，无论是初次接触还是熟练用户，都能从中找到所需的专业知识和技术支持。

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S7-200 Programmable Controller System Manual

C79000-G7076-C230-02

2.1 Panel Layout Considerations

Installation Configuration

You can install an S7-200 either on a panel or on a standard rail. You can mount the S7-200

either horizontally or vertically. An I/O expansion cable is also available to add flexibility to

your mounting configuration. Figure 2-1 shows a typical configuration for these types of

installations.

S7-200 I/O I/O

Panel mounting Standard rail mounting

S7-200 I/O I/O

I/O I/O

Figure 2-1 Mounting Configurations

Clearance Requirements for Installing an S7-200 PLC

Use the following guidelines as you plan your installation:

S The S7-200 CPU and expansion modules are designed for natural convection cooling.

You must provide a clearance of at least 25 mm (1 in.), both above and below the units,

for proper cooling. See Figure 2-2. Continuous operation of all electronic products at

maximum ambient temperature and load reduces their life.

S For vertical mounting, the output loading may need to be derated because of thermal

constraints. Refer to Appendix A for the data sheet for your particular CPU. If you are

mounting the CPU and modules on a DIN Rail, the DIN rail stop is recommended.

S If you are installing an S7-200 horizontally or vertically on a panel, you must allow 75 mm

(2.9 in.) for the minimum panel depth. See Figure 2-2.

S If you plan to install additional modules horizontally or vertically, allow a clearance of at

least 25 mm (1 in.) on either side of the unit for installing and removing the module. This

extra space is required to engage and disengage the bus expansion connector.

S Be sure to allow enough space in your mounting design to accommodate the I/O wiring

and communication cable connections.

ÂÂÂÂÂÂÂ

75 mm

(2.9 in.)

S7-200

Front of the

enclosure

Mounting

surface

25 mm

(1 in.)

25 mm

(1 in.)

25 mm

(1 in.)

Clearance for removing

expansion I/O module

Clearance for cooling

Front View Side View

S7-200 I/O

Figure 2-2 Horizontal and Vertical Clearance Requirements for Installing an S7-200 PLC

Installing an S7-200 Micro PLC

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S7-200 Programmable Controller System Manual

C79000-G7076-C230-02

Installing an S7-200 Micro PLC onto a Standard Rail

Warning

Attempts to install or remove S7-200 modules or related equipment when they are

powered up could cause electric shock.

Failure to disable all power to the S7-200 modules and related equipment during

installation or removal procedures may result in death or serious personal injury, and/or

damage to equipment.

Always follow appropriate safety precautions and ensure that power to the S7-200

modules is disabled before installation.

To install the S7-200 CPU module, follow these steps:

1. Secure the rail every 75 mm (3.0 in.) to the mounting panel.

2. Snap open the clip (located on the bottom of the module) and hook the back of the

module onto the rail.

3. Snap the clip closed, carefully checking to ensure that the clip has fastened the module

securely onto the rail.

Note

Modules in an environment with high vibration potential or modules that have been

installed in a vertical position may require DIN rail stops.

If you are installing an expansion module, use the following steps:

1. Remove the bus expansion port cover from the existing module housing by inserting a

screwdriver into the space between the bus expansion port cover and the housing, and

gently prying. Ensure that the plastic connecting joints are completely removed. Use

caution not to damage the module. Figure 2-9 shows proper screwdriver placement.

2. Insert the bus connector into the bus expansion port of the existing module and ensure

that the connector snaps into place.

3. Ensure that the expansion module is correctly oriented with respect to the CPU module.

If you are using an expansion cable, orient the cable up towards the front of the module.

4. Snap open the clip and hook the back of the expansion module onto the rail. Slide the

expansion module onto the bus connector until it snaps into place.

5. Snap the clip closed to secure the expansion module to the rail. Carefully check to

ensure that the clip has fastened the module securely onto the rail.

Installing an S7-200 Micro PLC

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