继续学习第三章

1. Open the Number_Of_Customers page. In the grid area, insert the variables Photo_Cell, Reset_Counter, and Customers_Qty.

打开Number_Of_Customers 页面。在网格区域，插入Photo_Cell, Reset_Counter变量和Customers_Qty变量。

2. Connect the variables to the Customer_Count_Up Function Block type as in the Figure 28.

如图28显示，连接变量到 Customer_Count_Up功能块。

Figure 28. .Variable connections to Customer_Count_Up Function Block Type

图 28. 变量连接到Customer_Count_Up功能块类型

3. Click Save and Close

点击保存和关闭

1. Open the Service_On_Doors page. In the grid area, insert the variables Motor_l, Serviced, Openings_Total, Service_Req, and Openings_Freq.

打开Service_On_Doors 页面。在网格区域，插入变量Motor_l,erviced, Openings_Total, Service_Req,和Openings_Freq.

2. Connect the variables to the Service_Count_Doors as in the Figure 29.

如图29，连接变量到Service_Count_Doors

Figure 29. Variable connections to Service_Count_Doors Function Block Type

图 29. 变量连接到 Service_Count_Doors功能块类型

3. Click Save and Close 

点击保存和关闭

If an error message should be displayed in the message pane, double-click the error line and you will jump directly to the error location in the code. You will also find a brief description in the message pane, explaining the type of error that has occurred.

如果在消息面板显示错误，双击错误行。将跳转到代码中的错误位置。你将在消息面板同时发现快速描述，解释发生的错误类型。