If you have a preference for a particular Memory Type, select it here.
Fixed type refers to the classic PLC memory naming convention, with abbreviations such as "I" for integer, or "S" for String,
followed by a number to differentiate the various bits and words. Examples such as I34, or S105, may seem familiar
to many PLC programmers.
Tagnames are a more recent method for naming the memory locations, whereby the programmer is allowed to define logical names
to the variables 'at will' — even prior to determining what type of memory location is required. There are a few rules
governing the selection of names, and there are many conventions that can make life much easier for the programmer.
The software does automatic housekeeping of all memory locations. There is no concern about physical addressing and memory conflicts.
Tagnames also lend well to the use of structure data types. Structures (and their associated tagnames) are defined based on
function rather than data type.
Structure data types:
Structure data types are specific sets of tags combined together for convenience. Using Structures in instructions can speed
up program development because multiple tags are created and assigned automatically. In the Productivity Suite, for example,
you simply check the "Use Structure" box and enter the name for your structure. The Productivity Suite software does the rest,
creating all the tags required for that instruction.