FSET program instruction FSET program instruction Syntax FSET (logical_unit) attribute_list Function Set or modify attributes of a serial line or a network device. Usage Considerations If a window has been referenced, it must have been opened already with an FOPEN instruction. If a serial line is referenced, it must have been attached already with an ATTACH instruction. The use of this instruction withnetwork devices applies only to systemswith the appropriate license(s). As with all eV+ I/O instructions, the IOSTAT real-valued function should be used after each FSET instruction to determine the success of the FSET request.
Parameters logical_unit Real value, variable, or expression (interpreted as an integer) that defines the logical unit number of the window to be accessed. (See the ATTACH instruction for a description of unit numbers.) attribute_list List of string constants, variables, and expressions; real values, variables, and expressions; and format specifiers used to define the characteristics of the window. See the description of the FOPEN instruction for detailed information on this parameter. Details Using FSET With Serial Lines The following specifications can be used as arguments to directly ATTACH a serial line:
SERIAL:n Local serial line n on the local controller The keywords listed in the following table may appear in the keyword list string. eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 263