Data access with I/O

You can develop distributed applications in which the functional components of an InTouch system are located on different nodes. The figure below shows how you configure an I/O request for data stored on another node.

You can set up an InTouch application to identify an element of data stored on another node by using a three-part addressing convention. This convention includes the node, application, and topic names. To obtain data from a remote node, you need to configure an Access Name for your InTouch application that specifies these three items.

For example, if you want to access data from a remote I/O Server running on another node, your Access Name consists of the following:

If you use an Excel spreadsheet as your InTouch data source, you can define your Access Name as follows:

In addition to the node, application, topic, and item, you need to specify the type of data located on the remote node. This information determines the I/O type for the tag when it is defined in the Tagname Dictionary.