Unverified50% confidenceFactExact time
FB (function block) is a functional unit with background data; its difference from FC is that it needs to preserve internal state; instantiation means allocating an independent background data area for each FB call, which in 200SMART is usually embodied as one variable.
1
Sources
50%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
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