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Unit 2 PLC

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Across
5
A group of adjacent bits usually operated as a unit. Like when moving data to and from memory.
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This type of bit is used to detect error when words get moved around.
9
A number system based on 2. So the only allowable numbers are 0 and 1.
10
Also known as Binary Digits. It is the smallest unit of information in the binary numbering system.
11
This can only have 1 input and 1 output. The input is normally closed. This can also be called an inverter.
13
The lowest value bit within a word.
16
Supposedly an easier form of expressing logic. Could also be applied to solving PLC problems.
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A logic gate that results in zero unless both inputs are zero.
20
A logic gate which produces an output which is false only if all its inputs are true.
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A circuit in which the components or contact symbols are connected end to end, and all must be closed to permit current flow.
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A number system based on 10. The only allowable numbers are 0-9. Also the everyday numbers that are used.
Down
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A number system based on 8. The only allowable numbers are 0-7.
2
An alphanumeric code that is used by anyone that has a computer. It is a seven-bit code.
3
A number system based on 16. Goes from 0-15. Also includes letters to express it.
4
At least 2 inputs and 1 output that are in parallel and normally open.
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A listing that shows the state of a given output as a function of all possible input combinations.
8
A system of numbering that expresses each individual decimal digit (0-9) of a series of 4-bit binary notations.
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A type of code that allows only 1 bit in the data word to change state at each increment of the code sequence.
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This gate logic is true when one input or the other is 1 but not both.
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A grouping of binary digits in a sequence and is treated as a unit. The size of this unit can vary based on the size of the PLC.
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At least 2 inputs and 1 output that are in series and normally open.
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A circuit in which two or more of the connected components or contact symbols in a ladder program are connected to the same pair of terminals so that current may flow through all the branches.
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The highest value bit within a word.