ABB AC 31 - 5.3. NAND operation; 5.4. Operation OR

Programming
ABB Control - AC 31 Page 5-35
1SBC 260400 R1001-b 06.99
5.3. NAND operation
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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5.4. Operation OR
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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