GFK-2950C February 2018 29
Chapter 3 Program Data
This chapter describes the types of data that can be used in an application program, and explains
how that data is stored in the PACSystems CPU’s memory.
▪ Variables
▪ Reference Memory
▪ User Reference Size and Default
▪ Genius Global Data
▪ Transitions and Overrides
▪ Retentiveness of Logic and Data
▪ Data Scope
▪ System Status References
▪ How Program Functions Handle Numerical Data
▪ User Defined Types (UDTs)
▪ Operands for Instructions
▪ Word-for-Word Changes
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