Save Strategy

The save strategy is based on a save of the active steps to a CPU-external memory area (PCMCIA memory card).

In the environment of individual sections, it is known, whether active steps have changed. Only in this case (or to recover from an error), the save will be performed.

Only the StepIDs (internal identifiers) of the active steps are saved due to memory consumption and needed time to save.

The save is done individually for each SFC section in its context.

Restore Strategy

In case of restore, the StepIDs are read from the PCMCIA memory card area and activated in the charts.

Those StepIDs must be consistent, i.e. all steps must be present and they must identify the same objects in the SFC sections as at the save-time.