Chapter 6 Symbol Variables * When naming for the variable symbols, do not use digits or DFB_(initials of the function keys by default). To achieve optimization, it is recommended to use what the system assigns for the variable address. 6.1.2 Symbol Variable Classification Symbol variables can be categorized into five types based on functions. The symbol category supported by global variable and program (local variable) are the same. The following table depicts the characteristics and details of the program (local variable), function block (local variable).and function (local variable).
6-3 Symbol Variable Classificat ion Local Variable Program Function Block Function AH/AS DVP AS5xx/ AH/AS DVP AS5xx/ AS5xx/ DVPxxMC DVPxxMC DVPxxMC VAR Position cannot be Assigned Supports Position cannot be Assigned Position cannot be Assigned ONLY ES3 & Position cannot be Assigned