Chapter 6 Symbol Variables *1. For more information on STEP, please refer to chapter 14. *2. The symbol variables for function block types and index types has special meanings. For more details, please refer to chapter 7- Function Block (FB) and library. 6-13 Data type Description AH/AS DVP AS5xx/ DVPxxMC Program FB Program FB Program FB FC ^ symbol is used to access the value at the address available in the pointer variable. Please notice that you must assign values to the pointer before using it, or an abnormal operation may be caused. Reference A reference variable is an alias for another existing variable with same data type, which setting initial values is needed.
For example, suppose you make mydata a reference (alias) to myref, you can input the initial values as either mydata or myref.