2. 在 STEP 7 Basic 中分配变量双击 DB1 在名称和数据类型下添加下列 3 个变量并给它们赋初始值 Item_01: "Byte" Item_02: "Int" Item_03: "DWord" 图.02 点击工具栏上的保存项目按钮, 再点击下载按钮下载项目 3. 在

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1 如何使用 PC Access 访问 S7-1200? 需要考虑什么? 描述您可以建立 PC Access 和 S PLC 之间的通信连接但是, 请注意一些限制注意西门子还未正式声明 PC Access 与 S PLC 之间连接的可行性, 因此在 S 系统手册中没有提及相关内容在下列章节, 您将读到建立连接的具体步骤限制由于 PC Access 原本是专为 S7-200 PLC 设计, 这里会有一些限制 : 只有 S PLC 的 DB1 中的变量, 原因是 S7-200 CPU 只有一个数据块 S PLC 的 DB1 必须使用非符号寻址请您在新建 DB1 时, 去掉仅符号访问的勾选框 ( 图 01). 要求下面列举的是硬件和软件方面的需求 : S PLC 以太网线 STEP 7 Basic V10.5 PC Access V (SP4) 在您的 S PLC 项目中新建 DB1 请依照下列步骤, 在您的 S PLC 项目中新建变量编号在您的 S PLC 项目中新建变量 1. 在您的项目中添加 DB1 点击项目树下的添加新块点击数据块按钮去掉仅符号访问 B 的勾选框点击确定按钮图.01 ( 填写文档类型 : 常问问题 ) P1-12

2 2. 在 STEP 7 Basic 中分配变量双击 DB1 在名称和数据类型下添加下列 3 个变量并给它们赋初始值 Item_01: "Byte" Item_02: "Int" Item_03: "DWord" 图.02 点击工具栏上的保存项目按钮, 再点击下载按钮下载项目 3. 在 STEP 7 Basic 中监视变量请使用 STEP 7 Basic 软件的惊恐表格功能核对变量的数值浏览项目树, 点击添加新监视表格按钮, 并在名称和地址中填写需要的变量在本例子中添加下列 3 个变量 : Item_01: "DB1.DBB0" Item_02: "DB1.DBW2" Item_03: "DB1.DBD4" 图.03 表 01 创建一个新 PC Access 项目, 并在其中创建变量请您依照下面指导, 建立 PC Access 和 S PLC 之间的连接, 进而访问 PLC 中的数据编号创建一个新 PC Access 项目, 并在其中创建变量 ( 填写文档类型 : 常问问题 ) P2-12

1. 创建一个新项目浏览菜单栏, 选择文件 > 新建创建一个新项目图.04 2.

请在此窗口中填写下列参数 : 名称 : S7-1200_PLC IP 地址 : 192.168.0.11 (IP adress of your S7-1200 PLC) TSAP 本地 : "10.00." ( PC Access 的 TSAP) TSAP 远程 : "03.

3 1. 创建一个新项目浏览菜单栏, 选择文件 > 新建创建一个新项目图添加新 PLC 选中项目下的条目 MicroWin(TCP/IP) 浏览工具栏, 先择编辑 > 新 > PLC 一个新 PLC 会被自动添加到项目中, 并自动打开 PLC 属性窗口请在此窗口中填写下列参数 : 名称 : S7-1200_PLC IP 地址 : (IP adress of your S PLC) TSAP 本地 : "10.00." ( PC Access 的 TSAP) TSAP 远程 : "03.01." (S PLC 的 TSAP) 点击确认按钮图添加新项目选中项目中的 S PLC 浏览工具栏, 先择编辑 > 新 > 项目项目属性窗口会被自动打开 ( 填写文档类型 : 常问问题 ) P3-12

4 为访问 S PLC 中的数据, 请您依照下面步骤 : 填写项目名称到名称输入域填写项目地址到地址输入域在数据类型输入域选择数据类型另外, 您可以设定存储区地址的访问权限为读取或写入点击确认按钮图.06 注意请您参考本文档结束部分的表格可访问的变量和项目中的可访问项目列表 4. 保存项目浏览工具栏, 选择文件 > 保存存储您的项目图. 07 注意在任何时候打开或编辑了 PC Access 项目, 您必须再次点击保存按钮以便把变量组态传送到服 ( 填写文档类型 : 常问问题 ) P4-12

5 务器图在测试客户机中监测项目选中您希望监测的项目, 然后点击工具栏上的在测试客户机中添加当前项目按钮被选中的项目会被添加到客户测试机图开始测试客户机点击工具栏上的测试客户机状态按钮客户测试机会在线访问目标数据在数值栏中, 您可以看到所列项目的实际数值如果成功连接的 S PLC, 质量栏中会显示好 ( 填写文档类型 : 常问问题 ) P5-12

6 图.10 表 02 可访问的项目下面表格列举了左右可访问的项目以及对应的地址格式举例 Item 变量标记输入输出 Address example "VB0", "VX1.0", "VW2", "VD4" etc. "MB8", "MX9.2", "MW10", "MD12" etc. "I0.0", "AI0" etc. "Q1.3", "AQ0" etc. 表 03 必要的 PC Access 版本需要使用 PC Access V (SP4) 或更高版本下载 PC Access V1.0 SP4 补订, 请访问条目 : 条目号 : 日期 : Scroll down for English: How can you access an S PLC by PC Access and what is to be considered? Description You can establish a connection between PC Access and your S PLC. Nevertheless, there are some restrictions to keep in mind. Note A connection capability between PC Access and an S PLC is not officially released by Siemens and, therefore, is not mentioned in the S Systems Manual. In the following chapters, you will find a description of how to establish such a connection. Restrictions There are certain restrictions to be considered due to the fact that PC Access was originally intended to access an S7-200 PLC: Only tags in the data block DB1 of your S PLC can be accessed because the S ( 填写文档类型 : 常问问题 ) P6-12

7 only had one data block. DB1 in your S PLC needs to be non-symbolic. Please uncheck the checkbox "Symbolic access only" when creating your DB1 (Figure 01). Requirements The following items are the hardware and software requirements: S PLC Ethernet cable STEP 7 Basic V10.5 PC Access V (SP4) Create tags in data block DB1 of your S PLC project To create tags in your S PLC follow the instructions below. No. Create tags in data block DB1 of your S PLC project 1. Add the data block DB1 to your project Browse the "project tree" and click on the item "Add new block". Click the button "Data block (DB)". Uncheck the checkbox "Symbolic access only". Click the "OK" button. Fig Allocate the tags in STEP 7 Basic Double-click DB1. Add the following three tags under "name" and "Data type" and give them an "initial value". Item_01: "Byte" Item_02: "Int" Item_03: "DWord" ( 填写文档类型 : 常问问题 ) P7-12

8 Fig.02 Click the item "Save project" in the tool bar. Download the project by clicking the download button in the tool bar. 3. Monitor the tags in STEP 7 Basic To cross-check the tag values, use the watch table function of STEP 7 Basic. Browse the "Project tree" for the item "Add new watch table" and fill in the "Name" and "Address" of the required tags. In this example, add the following three tags: Item_01: "DB1.DBB0" Item_02: "DB1.DBW2" Item_03: "DB1.DBD4" Fig.03 Table 01 Create a new PC Access project and access tags Follow these instructions to establish a connection between PC Access and your S PLC to access data of your PLC. No. Create a new PC Access project and access tags 1. Create a new project Browse the menu bar, and select "File > New". A new project will be created. ( 填写文档类型 : 常问问题 ) P8-12

9 Fig Add a new PLC Highlight the entry "MicroWin(TCP/IP)" in the "project tree". Browse the menu bar, and select "Edit > New > PLC". A "NewPLC" object will be added, and the "PLC properties" dialog window of the new PLC opens. Enter the following parameters into the input fields of this window: Name: "S7-1200_PLC" IP Address: " " (IP adress of your S PLC) TSAP Local: "10.00." (TSAP of your S PLC) TSAP Remote: "03.01." (TSAP of PC Access) Click the "OK" button. Fig Add a new item Highlight your S PLC in the "project tree". Browse the menu bar, and select "Edit > New > Item". The dialog window "Item properties" opens. To access data in your S PLC, perform the following steps: ( 填写文档类型 : 常问问题 ) P9-12

Enter an item name in the "Name:" input field. Enter the address of the tag in the "Address:" input field. Select the type of data in the "Data Type:" input field.

06 Note Please find a list of the accessible items at the end of this document in the table "accessible tags and items". 4.

10 Enter an item name in the "Name:" input field. Enter the address of the tag in the "Address:" input field. Select the type of data in the "Data Type:" input field. Additionally, you can restrict the memory address access to "read" only or "write" only. Click the "OK" button. Fig.06 Note Please find a list of the accessible items at the end of this document in the table "accessible tags and items". 4. Save the project Browse the menu bar, and select "File > Save" to save your project. Fig,07 Note Anytime you open or edit a PC Access project, you must click the "Save" button to send tag configurations to the server. ( 填写文档类型 : 常问问题 ) P10-12

tool bar. The selected items will be added to the Test Client. Fig.09 6.

11 Fig Monitor items via the Test Client Highlight the items you want to monitor and and click the "Add current items to test client" button in the tool bar. The selected items will be added to the Test Client. Fig Start the Test Client Click the "Start Test Client" button in the tool bar. The Test Client will go online and access the designated data. In the "Value" column, you can see the actual values of the listed items. If you are connected to your S PLC, the "Quality" of the item is listed as "Good". ( 填写文档类型 : 常问问题 ) P11-12

Fig.10 Table 02 Accessible items The following table shows all accessible items, including address examples. Item tags markers inputs outputs Address example "VB0", "VX1.0", "VW2", "VD4" etc.

12 Fig.10 Table 02 Accessible items The following table shows all accessible items, including address examples. Item tags markers inputs outputs Address example "VB0", "VX1.0", "VW2", "VD4" etc. "MB8", "MX9.2", "MW10", "MD12" etc. "I0.0", "AI0" etc. "Q1.3", "AQ0" etc. Table 03 Required version of PC Access The required version of PC Access is V (SP4) or higher. Please download PC access V (SP4) in entry ID Entry ID: Date: ( 填写文档类型 : 常问问题 ) P12-12

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2. 在 STEP 7 Basic 中分配变量双击 DB1 在 名称 和 数据类型 下添加下列 3 个变量并给它们赋初始值 Item_01: "Byte" Item_02: "Int" Item_03: "DWord" 图.02 点击工具栏上的 保存项目 按钮, 再点击 下载 按钮下载项目 3. 在

2. 在 STEP 7 Basic 中分配变量双击 DB1 在名称和数据类型下添加下列 3 个变量并给它们赋初始值 Item_01: "Byte" Item_02: "Int" Item_03: "DWord" 图.02 点击工具栏上的保存项目按钮, 再点击下载按钮下载项目 3. 在