Access I/O data by remote references

The InTouch HMI supports true client-server architecture for factory automation applications. You can design client applications without using any tags from the local Tagname Dictionary located on the same node as the running InTouch application. You can run an application on one node that uses tags from a remote node by using remote tag referencing.

The following figure shows a simple example where the TempTag is defined locally on Node2:

In this example, the InTouch application running on Node1 can retrieve the value of TempTag on Node2 by two methods:

• Create an I/O type tag in Node1's Tagname Dictionary that uses Node2 as the Node Name in the Access Name associated with the I/O tag.

• Use a remote reference directly to TempTag. For example, Node2:"TempTag".

When you want to directly reference a remote tag in any other application, only AccessName:item is required. You do not have to define the remote tag in your local Tagname Dictionary. Remote references can also access data from any I/O data source such as a DAServer or Microsoft Excel.

You can also make a remote reference to SuperTags. The valid syntax for a remote tag reference to a SuperTag is:

Access_name:Parent_Instance\ChildMember\SubMember.

For more information about remote references to SuperTags, see Reference Supertag members.

When importing a window or QuickScript, you can convert the placeholder tags to remote tag references. You do not have to define tags in your local Tagname Dictionary. The remote references are accessible from any application on the network.