HMI Tags
HMI tags are used for animating graphical objects on HMI pages and controlling the automation application via the HMI. In general, an HMI tag can be seen as an HMI-internal variable. Via the HMI tag, the HMI application gets read or write access to variables. By adding a dynamic to an HMI object property and linking this dynamic to an HMI tag, the value of the variable can be visualized/written via the HMI.
PLCnext Engineer supports the use of two different types of HMI tags:
- HMI tags created from controller variablesHMI tags created from controller variables are visible to every HMI station (HMI client). If a controller variable changes, the change affects the variable of all HMI clients, i.e., each client using this variable has the same value for this variable.
Further Info
For details see the topic "HMI Tags Created From Controller Variables". - Local HMI tagsLocal HMI tags are only visible to one HMI station (HMI client), i.e., the tag is associated with a particular client. If a local HMI tag changes, the change only affects the tag of the particular client, i.e., each client using this tag may have a different value for this tag.
Further Info
For details see the topic "Local HMI tags".