Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Manual do Utilizador descarregar pdf (Página 34)

Chapter 2 Organize tags

Data Type Range

DINT -2,147,483,648...2,147, 483,647

INT -32,768...32,767

LINT 0...32535129599999999

SINT -128...127

REAL -3.402823E38 to -1.1754944E-38 (negative values)

and

1.1754944E-38 to 3.402823E38 (positive values)

Logix5000 controllers also let you use arrays to organize data.

Term Definition

Array A tag that contains a block of multiple pieces of data.

• An array is similar to a file.

• Within an array, each individual piece of data is called an element.

• Each element uses the same data type.

• An array tag occupies a contiguous block of memory in the controller, each element in sequence.

• You can use array and sequencer instructions to manipulate or index through the elements of an

array.

• You organize the data into a block of one, two, or three dimensions.

The subscript identifies each individual element within the array. A subscript

starts at 0 and extends to the number of elements minus 1 (zero based).

Create an array

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Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Manual do Utilizador Página 34