System variables

System variables are automatically created when you create the System object in a FactoryTalk® Optix™ project. When you bind a property of a graphic object to a system variable, the system objects in Project view appear as categories in the Dynamic Link browser.

Each category contains predefined variables:
  • Application. Variables that provide a blink rate value. These variables determine the number of seconds a value alternates between showing and clearing a value.
  • DateTime. Variables that provide current date and time values of the HMI device and allow you to configure date, time, and time zone in the HMI device.
  • Display. Variables provide screen brightness, resolution, scale, and orientation.
  • Network interfaces. Variables that provide the network settings such as IP addresses for the HMI device.
  • WiFi. Variables that allow you to bind to operating mode, network name, security mode, username, password, and access to the LAN network.