Nand Operation; Operation Or - ABB AC 31 Technical Manual

5.3. NAND operation

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5.4. Operation OR

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ABB Control - AC 31
1SBC 260400 R1001-b 06.99
Programming
The output has a 0 status if all the inputs have a 1 status.
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A NAND diagram has the same function as an OR diagram with the inputs inverted.
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The status of an OR diagram output is 1, if at least one of the inputs has a status of 1.
The figure to the left represents a ladder diagram OR operation with three inputs. The number
of contacts, which may be placed in parallel, is unlimited.
The diagram to the right represents the same function with a function block. The number of
inputs for an OR function block is limited to a maximum of 128.
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