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Function Block (fb) - Mitsubishi Electric A800 Programming Manual

800 series, plc function.
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3.4.2

Function block (FB)

A function block (FB) is a repeatedly used ladder blocks that is treated as a component so that it can also be used in other
sequence programs.
<Without FBs>
Project A
Program 1
Program 2
Project B
Program 3
Repeatedly-used
circuit blocks are
treated as a block
and treated as
one component.
Reuse
FB
Programming language
<With FBs>
Project A
Program 1
FB
Program 2
FB
Project B
Program 3
FB
Sequence program
3
77

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F800

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