Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Bedienungsanleitung PDF herunterladen (Seite 24)

Chapter 2 Organize tags

The minimum memory allocation for a tag is four bytes. When you create a tag

that stores data that requires less than four bytes, the controller allocates four

bytes, but the data only fills the part it needs.

Data Type Bits

31 16 15 8

BOOL Not used 0 or 1

SINT Not used -128…+127

INT Not used -32,768…+32,767

DINT -2,147,483,648…+2,147,483,647

REAL -3.40282347E

…-1.17549435E

-38

(negative values)

-1.17549435E

-38

-…3.402823 47E

(positive values)

The COUNTER and TIMER data types are examples of commonly used

structures.

Item Description

To expand a structure and display its members, click the + sign.

To collapse a structure and hide its members, click the – sign.

Members of running_seconds.

COUNTER Structure.

TIMER Structure.

Data Type Members.

To copy data to a structure, use the COP instruction.

Refer to the Logix5000 Controllers General Instructions Reference Manual

publication 1756-RM003.

24 Rockwell Automation Publication 1756-PM004E-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Bedienungsanleitung Seite 24