Programs

IntroductionA program is defined in IEC 61131-1 as a “logical assembly of all the programming language elements and constructs necessary for the intended signal processing required for the control of a machine or process by a programmable controller system”.Declaration SyntaxThe declaration of a program must be performed as follows:PROGRAM < program name>Declaration of variables (see the relevant section)Program bodyEND_PROGRAM

Keyword	Description
Program Name	Name of the program being declared.
Program body	Specifies the operations to be performed to get the intended signal processing. It can be written in any of the languages supported by GF_ProjectVX code.

Writing Programs in GF_ProjectVX CodeWhatever the PLC language you are using, GF_ProjectVX code allows you to disregard the syntax above, as it supplies a friendly interface for writing programs.