A.2 System VariablesThere are two kinds of system variables. One is used for logic and the other for screens. Users cannot edit the variables, for example, register the names of their choice, or change or delete addresses.
Furthermore, there are two types of system variables. One is an integer-type and the other is a bit-type.
[Address] Window
Select [Symbol Variable] to display a list of symbol variables. Under [Type], select [System Variable (Bit)] or [System Variable (Integer)] to display the variables by type.
For Logic Screens/Function Blocks
Double-click the operand and click 
to select the system variable.
