1.1. VMT-HART APPLICATION OVERVIEW VMT-HART application has an intuitive graphical interface, thus, allowing user to configure, calibrate, monitor process variables and diagnose status of HART devices in a quick and easy way. VMT-HART is based on DDL (Device Description Language) and accesses device parameters in a standard mode, as defined by its manufacturer. It supports devices with versions 5, 6 and 7 of HART protocol. VMT-HART performs communication with HART devices using a "HART Modem" interface that enables real-time access between VMT-HART and the HART device. There is a wide variety of "HART Modem" on the market but only VCI10-AH and VCI10-BH interfaces from Vivace Process Instruments are compatible with the VMT-HART. Details about these interfaces can be found at VCI10-AH Interface and ” VCI10-BH Interface topics.