The communications section of the Schema Viewer Preferences dialog includes the following parameters:
Maximum Communications Concurrency. Defines the maximum number of devices which may be programmed by a single communications request.
Default Communications Serial Communications Port. Indicates the default PC COM port that Schema Viewer should use when communicating with a control station.
Default Communications Hardware Mode. Indicates the communications protocol (RS-232, RS-485 or IR) that Schema Viewer should use when communicating with a control station..
Controller Communications Mode. Schema Viewer supports two methods of communicating with control stations: single-threaded mode and multi-threaded mode. FAC-2000 controllers executing first-generation executable code versions (version 1.21 and below) communicate in single-threaded mode. Controllers executing second-generation executable code versions (version 2.00 and above) communicate in multi-threaded mode. Prior versions of Schema Viewer cannot communicate in multi-threaded mode.
Figure 6.3. Schema Viewer Preferences dialog (Communications tab).
Schema Viewer Preferences-File Access Section Security in Schema Viewer