Server extension

Situation

Images from the PLC are not displayed in the HMI, although the server extension is installed and the image symbols are appropriately linked.

Solution 1

Missing administrator rights

You have chosen "Stream" as the image format, but you haven't started the HMI server as an administrator. Either select a different image format (BMP, PNG or JPG), or start the HMI server as an administrator.

Situation

The TcHmiVision server extension has been successfully integrated into the project. Images are displayed in the Live View or on the HMI provided by the Engineering server. The project could also be published error-free on the standalone TcHmi server. However, no images are displayed on the published HMI.

Solution 1

Missing target licenses

A target license is included in the TC3 HMI server license. Additional licenses are required if the HMI server is to communicate with several targets (ADS connections).

Solution 2

Wrong configuration of the runtime environment

The default configuration used in Engineering may differ from the published configuration (different AmsNetIds). Therefore, check the configuration of the runtime environment and adjust it if necessary.

Solution 3

Restricted user rights

The TwinCAT HMI user management is used and the currently logged-in user has no permissions to view the images or receive the extension data. Check the authorizations of your user groups.

Solution 4

Limit the data quantity or the refresh interval

As the data quantity can be quite large, especially in the case of several images that have to be retrieved simultaneously from the controller by ADS and converted by the HMI server, this can lead to bottlenecks. Several options are available to remedy this: reducing the size of the images in the controller, increasing the refresh rates of the individual images, using different refresh rates or using a compressed image format.