Tag List - Siemens Simatic S7-1500 Function Manual

User interfaces (API)
7.6 API IInstances
7.6.4

Tag list

UpdateTagList()
The function reads the tags from the virtual controller and writes them to the shared storage
arranged by name.
If the tag is an array or a structure, there are multiple entries.
In the case of a structure, there is an entry for the structure itself and an additional entry for
each structure element.
Entry_1: "StructName"
Entry_2: "StructName.ElementName_1"
..
Entry_N: "StructName.ElementName_n"
In the case of an array, in this example a two-dimensional array, there is an entry for the
array itself and an additional entry for each array element.
Entry_1: "ArrayName"
Entry_2: "ArrayName[a,b]", where {a} and {b} correspond to the first index of the
respective dimension
..
Entry_N: "ArrayName[x,y]", where {x} and {y} correspond to the last index of the
respective dimension
Memory for up to 500000 entries (not PLC tags) is reserved for the list. If the list becomes
too large, the function returns the error/exception "NOT_ENOUGH_MEMORY".
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S7-PLCSIM Advanced
Function Manual, 12/2017, A5E37039512-AB