Figure 1. Insert Unit dialog for inserting hardware in a controller configuration

图 1. 插入单元对话框用于插入控制器配置的硬件

It is not possible to select Insert Unit if the unit cannot contain any sub-units or if no more positions are available.

如果硬件单元不能包含任何子单元或没有更多可用位置，则无法选择插入单元。

3. Expand the relevant library folder under Connected Libraries, and select the hardware type to be included.

展开“连接的库”下的相关库文件夹，然后选择要包含的硬件类型。

The Libraries in Project contains libraries that are added to the project but not yet connected to the controller. If a unit is selected under Libraries in Project, the option to connect the library to the controller appears.

项目的库包含已经添加到项目，但是还没有连接到控制器的库。如果选中项目中库下面的单元，将出现连接库到控制器的选项。

4. From the Position drop-down list, select a position for the hardware unit.

从下拉列表处，选择硬件单元的位置。

By default, the first available position is chosen. If no more positions are available, the Position drop-down list is empty and the Insert button is disabled.

默认的，选择第一个可用位置。如果没有多的可用位置，下拉列表位置为空，插入按钮不可用。

5. For units supporting redundancy, check the Enable redundant mode check box, and select a position for the backup unit.

对于支持冗余的设备单元，请选中启用冗余模式复选框，然后选择备份设备的位置。

Some redundant units have a fixed position offset. For these units, the backup position is automatically calculated, and the user cannot change this position.

一些冗余单元有固定位置偏移。对于这些单元，自动计算备份位置，用户无法修改位置。（也就是主单元位置确定，热备单元位置就确定了，不能去认为修改热备单元的位置）

Click Previous or Next to navigate to another unit in the Project Explorer hardware tree.

点击前一个或者后一个按钮来浏览项目资源管理器硬件树的的另一个单元。

6. In the Name field, enter a name for the unit. After the unit is inserted in the hardware tree, this name appears along with the name of the selected type.

在名字一栏，输入单元的名字。单元插入硬件树之后，这个名字伴随选中的类型名字一起显示。

7. Click Insert to apply the changes made.

点击插入应用做出的修改。

8. Click Close to close the dialog.

点击关闭按钮，关闭对话框

To rename the unit after it is inserted, right-click the unit, and select Rename Unit.

要在插入后修改名字，右键点击单元，选择重命名单元。

Figure 2. Example of a hardware tree with a name for the AI820 unit

图 2. AI820单元有名字的硬件树的例子

Perform the following steps to replace a hardware unit in a controller configuration:

在控制器配置中按照下列步骤替换硬件单元：

1. Make sure that the library, which contains the hardware type to be added, is inserted to the project and connected to the controller.

确保将包含要添加的硬件类型的库插入到项目中并连接到控制器。

2. Right-click on the unit to be replaced, and select Replace Unit to open the Replace Unit dialog.

右键点击要替换的设备，选择更换设备，打开更换设备对话框。

The Replace Unit dialog works in the same way as the Insert Unit dialog, except that it is not possible to change the position of the unit in the Replace Unit dialog.

替换设备对话框和插入设备对话框工作方式相同，只是不能在替换设备对话框中修改设备位置。