Math OperationsBeginnerIEC 61131-3

MUL (Multiplication)

Multiplies two numeric values and outputs the product.

The MUL function block multiplies two input values and outputs the product. It is used for scaling analog values, calculating areas/volumes, applying conversion factors, and production rate calculations in PLC programs.

Parameters

Inputs

Name	Type	Description
IN1	ANY_NUM	First factor
IN2	ANY_NUM	Second factor

Outputs

Name	Type	Description
OUT	ANY_NUM	Product (IN1 * IN2)

Ladder Logic Example

// Ladder Logic - MUL (Scaling)
//
// |----[MUL]----|
// | IN1: Raw_Analog      |
// | IN2: Scale_Factor     |
// | OUT: Scaled_Value     |

Structured Text Example

Scaled_Value := Raw_Analog * Scale_Factor;
Total_Length := Piece_Count * Piece_Length;

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Platform-Specific Implementation

Siemens (TIA Portal)

Use MUL instruction in TIA Portal.

Allen-Bradley (Studio 5000)

Use MUL instruction in Studio 5000.

CODESYS

Use * operator in ST or MUL function block.

Common Applications

Analog signal scaling
Unit conversion
Production rate calculation
Area/volume calculation
Cost calculation

Frequently Asked Questions

What is MUL (Multiplication) in PLC programming?

Multiplies two numeric values and outputs the product. The MUL function block multiplies two input values and outputs the product. It is used for scaling analog values, calculating areas/volumes, applying conversion factors, and production rate calculations in PLC programs.

What are common applications of MUL (Multiplication)?

MUL (Multiplication) is commonly used for: Analog signal scaling, Unit conversion, Production rate calculation, Area/volume calculation, Cost calculation.

How do I use MUL (Multiplication) in different PLC platforms?

Siemens: Use MUL instruction in TIA Portal. Allen-Bradley: Use MUL instruction in Studio 5000. CODESYS: Use * operator in ST or MUL function block.