If an object with a tag or expression connection has a broken connection to its data provider, the object is shown as a wire frame. Wire-framed graphic objects on a display indicate that Live Data items cannot be acquired from the data providers (HMI server, FactoryTalk® Linx™, or OPC server).
If graphic objects on a display are wire-framed, consider the following potential causes and remedies.
If a device, such as a ControlLogix controller, inhibits data communications, graphic objects will be shown as wire frames.
FactoryTalk ViewPoint Live Data acquisition is dependent on HMI services. If these services are not running, graphic objects associated with live data items will be wire-framed.
All necessary HMI services start automatically when FactoryTalk View server startup type is set to “Load and run startup components when operating system initializes”. However, if the startup type is set to “On demand”, HMI services must be started manually by either opening FactoryTalk View client or FactoryTalk View Studio.
If networking and communications have failed on the host computer, the FactoryTalk ViewPoint server will be unable to communicate with the FactoryTalk View Live Data servers.
If the same graphic objects are wire-framed, the problem is not in the FactoryTalk ViewPoint but at the lower levels such as the networking and communications.
If the FactoryTalk ViewPoint server contains an underscore character in its host name, a FactoryTalk ViewPoint client connecting to it using the syntax http://computer_name/ftvp will show all objects as wire frames. This is not a product issue but the limitation of the web platform the product relies on.
For more information, see Answer ID 64842 in the Rockwell Automation Knowledgebase.