Siemens SIMATIC BATCH Operating Manual page 517

process if the BCS fails or the network connection between the AS and BATCH server breaks
down. The recipe control continues to run unaffected on the AS.
If a reference in a recipe is executed beyond unit boundaries, the recipe phase containing the
target parameter does not wait to start until the recipe phase from which the source parameter
originates is completed. The two recipe phases are executed separately. If you want the target
recipe phase for the parameter not to start until the parameter source recipe phase is
completed, you must set a synchronization at the appropriate place in the recipe.
Synchronization between units and references beyond the boundary of the unit are controlled
by the BATCH server.
Recipe engineering
Based on the following graphics from the BATCH recipe editor, you can see the differences
in the configuration of the two modes.
If you use the "UNIT_PLC" block, when you create a new hierarchical master recipe, AS-based
mode will always be used automatically as default and you have the option of selecting the
mode for every RUP. For recipes configured based on the "IUNIT_BLOCK" block, PC-based
mode is used automatically and AS-based mode cannot be used.
Note
A mode selected in the recipe can no longer be modified in the batch if this is planned or
released.
SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA
BATCH Recipe Editor
10.4 Creating recipes
517