4328 Propagate Tricon alarms as I/A series system messages, read/write alias data to meet I/A series requests, synchronize time from I/A series environment, read Tricon diagnostic information for I/A series workstations to display Write protect to lock all I/A series sources for changes to the Tricon controller 4328 hot spare function, can communicate continuously with the I/A series node bus ACM also supports Triconex protocol and application programs on external host PC connected to a separate BNC port (marked as NET 2) 4328 TriStation 1131 software TriStation protocol TSAA protocol 4328 for Triconex applications TSAA/TCP (UDP/IP) for user written applications on external hosts