Type ConversionIntermediateIEC 61131-3

INT_TO_STRING (Integer to String Conversion)

Converts integer value to its decimal string representation for display or logging.

The INT_TO_STRING function converts an integer value to its string (text) representation. This is essential for displaying numeric values on HMI screens, constructing log messages, building communication strings, and creating formatted output. The resulting string contains the decimal representation of the number, including a leading minus sign for negative values.

Parameters

Inputs

Name	Type	Description
IN	INT	Integer value to convert to text

Outputs

Name	Type	Description
OUT	STRING	String representation (e.g., 42 becomes '42')

Structured Text Example

// Build status message
Count_String := INT_TO_STRING(Part_Count);
Status_Msg := CONCAT('Parts produced: ', Count_String);

// Build log entry
Log_Entry := CONCAT('Error code: ', INT_TO_STRING(Error_Code));

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Platform-Specific Implementation

Siemens (TIA Portal)

Use VAL_STRG or INT_TO_STRING in TIA Portal SCL.

Allen-Bradley (Studio 5000)

Use DTOS (DINT to String) instruction in Studio 5000.

CODESYS

Use INT_TO_STRING() function in ST.

Common Applications

HMI display formatting
Log message construction
Serial communication strings
Report generation
Alarm message building

Frequently Asked Questions

What is INT_TO_STRING (Integer to String Conversion) in PLC programming?

Converts integer value to its decimal string representation for display or logging. The INT_TO_STRING function converts an integer value to its string (text) representation. This is essential for displaying numeric values on HMI screens, constructing log messages, building communication strings, and creating formatted output.

What are common applications of INT_TO_STRING (Integer to String Conversion)?

INT_TO_STRING (Integer to String Conversion) is commonly used for: HMI display formatting, Log message construction, Serial communication strings, Report generation, Alarm message building.

How do I use INT_TO_STRING (Integer to String Conversion) in different PLC platforms?

Siemens: Use VAL_STRG or INT_TO_STRING in TIA Portal SCL. Allen-Bradley: Use DTOS (DINT to String) instruction in Studio 5000. CODESYS: Use INT_TO_STRING() function in ST.