This is the Host System Interoperability testing verifying the basic host functionality needed for interoperability Functional Tests Supported in HIST: Initial Connection and Address Assignment Reading and Writing of Field Device Information Test of configuration of link objects and schedule Testing of Mode and Status Testing of Alarms and Events Testing of View and Trend Objects Testing of Block Specific Behavior Testing of the Device Description Support Testing of the Capabilities File Support (need for offline configuration) There is no additional registration given to participants,but there is a Letter of Confirmation (LOC)for participants top