Unverified50% confidenceFactExact time
Siemens PLC program blocks are divided into four major categories: OB (Organization Block, where OB1 is the main cyclic scan block), FB (Function Block with instance data blocks), FC (stateless Function), and DB (Data Block).
1
Sources
50%
Confidence
Long-term
Relevance
9/2/2026
First Seen
Sources
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