The TSENTRY Screen Explorer, or Texplore, is the application used to display HMI screens to a user.  Texplore is simply an application for browsing the TSENTRY HMI subsystem, much like Internet Explorer is an application for browsing the Internet.  Texplore provides much of the common framework for an HMI such as connecting to a TSENTRY host, reading the HMI configuration file, providing a login screen, and managing the navigation between screens within the HMI application, but by itself does not define any specific HMI screens.

Texplore relies on several processes running on the TSENTRY controller to provide it with information as it operates as the HMI client browser.  These are:

• The NtRtInfo service, which exposes static information from the TSENTRY controller to client objects in a request/reply architecture.

• The Tsecurity service, which provides authentication and authorization services to client objects.

• The GsmOpcSvr process, which exposes the values of individual variables in global memory on the TSENTRY controller.

• The TrendSrv process, which exposes sampled or trended values of variables in global memory on the TSENTRY controller.