Blocks
Five types of blocks are available:
- Organization blocks (OB) - for managing the control program
- Programming blocks (PB) - contain the control program structured according to functional or process-oriented characteristics
- Sequence blocks (SB) - for programming sequential controls
- Function blocks (FB) - contain frequently occurring and particularly complex program parts
- Data blocks (DB) - for storing data required for processing the control program.
Some S5 PLCs also have block types FX (Extended Function Blocks), and DX(Extended Data Blocks); these are not distinct block types, but rather are another set of available blocks due to the CPU having more memory and addressing space.
Read more about this topic: Simatic S5 PLC
Famous quotes containing the word blocks:
“In any case, raw aggression is thought to be the peculiar province of men, as nurturing is the peculiar province of women.... The psychologist Erik Erikson discovered that, while little girls playing with blocks generally create pleasant interior spaces and attractive entrances, little boys are inclined to pile up the blocks as high as they can and then watch them fall down: “the contemplation of ruins,” Erikson observes, “is a masculine specialty.””
—Joyce Carol Oates (b. 1938)
“The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers.”
—Erich Fromm (1900–1980)
“He has given me six hundred street signs.
The time I was dancing he built a museum.
He built ten blocks when I moved on the bed.
He constructed an overpass when I left.”
—Anne Sexton (1928–1974)