Baumer GK473 - Manual (Page 21)

Manual_GK473_S7_Profibus_EN.doc 21/32 Baumer IVO GmbH & Co. KG
04.05.11 Villingen-Schwenningen, Germany
3.11 Remanent profile storing
Data blocks may be defined as „ not process relevant“ (key word: UNLINKED) so that they are stored
only in the remanent memory when being loaded into CPU. Thus they do not burden the CPU
memory unnecessarily and the relevant data are only loaded if required. This procedure is especially
recommended for profiles since they do not require frequent access due to the fact that a profile is
not being altered very often. A data block is marked as “not process relevant” by using the right
mouse key to click on block SIMATIC Manager Æobject properties” and by ticking „unlinked“ in index
card „General – Part 2“ (see screenshot).
Besides an integrated RAM memory, the S7-300-CPUs load memory may also provide an integrated
EPROM part. Otherwise the memory is supplied by battery buffer so that the data will remain even
after PLC switch off. Therefore it is recommended to store SPA profiles in a data block marked “not
process relevant” and to load the profiles only if necessary. This loading operation is realized by
system function SFC 20 BLKMOV.
3.12 Creating an AWL-(STL Statement List) source file