SFC 20        Block Move

With this system function you can copy the content of any memory area into another one. The source area as well as the destination area are displayed as ANY. Just the number of bytes that exist in the source area as well as in the destination area is transfered. The return value RET_VAL is, not like in a S7, always ‘0’.

If you specify source- or destination area explicitly by a variable declared as ANY, and the source- or destination area is in the local data, you will have to note that the identification $87 is specified in ANY, not $86 because this is interpreted by the SFC20 as their own local data, and these do not exist.

See also:

System Functions

S7-300 and S7-400 are registered trademarks of the Siemens AG.