# How to Use KEPware Enhanced OPC DDE KEPServer v4.500.465 with Excel
KEPware Enhanced OPC DDE KEPServer v4.500.465 is a data server that provides connectivity to various industrial devices and applications. It supports OPC, DDE, and other native interfaces for data exchange. One of the common applications that can use KEPware Enhanced OPC DDE KEPServer v4.500.465 is Microsoft Excel, which can read and write data from and to the server using DDE formulas.
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In this article, we will show you how to configure KEPware Enhanced OPC DDE KEPServer v4.500.465 and Excel to establish a DDE connection and exchange data.
## Configuring KEPware Enhanced OPC DDE KEPServer v4.500.465
Before you can use KEPware Enhanced OPC DDE KEPServer v4.500.465 with Excel, you need to configure the server project and enable DDE connectivity. Follow these steps:
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1. Create a server project and add the appropriate driver and device for your data source. You can also use the Simulation Driver Demo project included with KEPware Enhanced OPC DDE KEPServer v4.500.465.
2. Change the server process mode to Interactive mode by right-clicking on the Administration menu and selecting Settings. Then, open the Runtime Process tab and select Interactive from the Selected Mode drop-down menu.
3. Enable DDE connections by choosing File | Project Properties and selecting the DDE tab. Under General, select Yes for Enable for DDE connections to the server. Leave the Service Name as "kepdde" and enable all three formats under Formats.
4. Restart the server so the changes take effect.
## Configuring Excel
To access data from KEPware Enhanced OPC DDE KEPServer v4.500.465 in Excel, you need to use DDE formulas that specify the application name, topic, and item. The application name is "kepdde", the topic is "\_ddedata", and the item is the full path identifier of the tag or address you want to access.
For example, if you want to read the value of Channel1.Device1.Tag1 from KEPware Enhanced OPC DDE KEPServer v4.500.465 in cell A1 of Excel, you can use this formula:
=DDE("kepdde","_ddedata","Channel1.Device1.Tag1")
If you want to write a value of 100 to Channel1.Device1.Tag2 from cell B1 of Excel, you can use this formula:
=DDE("kepdde","_ddedata","Channel1.Device1.Tag2",100)
You can also use arrays to read or write multiple values at once. For example, if you want to read an array of 10 values from Channel1.Device1.ArrayTag[0] to Channel1.Device1.ArrayTag[9] in cells C1:C10 of Excel, you can use this formula:
=DDE("kepdde","_ddedata","Channel1.Device1.ArrayTag[0]:Channel1.Device1.ArrayTag[9]")
If you want to write an array of 10 values from cells D1:D10 of Excel to Channel1.Device1.ArrayTag[0] to Channel1.Device1.ArrayTag[9], you can use this formula:
=DDE("kepdde","_ddedata","Channel1.Device1.ArrayTag[0]:Channel1.Device1.ArrayTag[9]",D1:D10)
## Conclusion
KEPware Enhanced OPC DDE KEPServer v4.500.465 is a powerful data server that can connect to various industrial devices and applications using OPC, DDE, and other native interfaces. By following this article, you can learn how to configure KEPware Enhanced OPC DDE KEPServer v4.500.465 and Excel to establish a DDE connection and exchange data.
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