Multiply (MUL)

The MUL instruction multiplies Source A with Source B and places the result in the Destination.

Available Languages
-    Ladder Diagram

-    Function Block

-    Structured Text
This instruction is not available in structured text. *
* There is no equivalent structured text instruction. Use the operator in an expression.

Operands
-    Ladder Diagram

Operand	Type	Format	Description
Source A	SINT INT DINT REAL	Immediate tag	value of the multiplicand
Source B	SINT INT DINT REAL	immediate tag	value of the multiplier
Destination	SINT INT DINT REAL	tag	tag to store the result

-    Function Block

Operand	Type	Format	Description
MUL tag	FBD_MATH	structure	MUL structure

-    Structured Text
Use the multiply sign "*" as an operator within an expression. This expression multiplies sourceA by sourceB and stores the result in dest.

dest := sourceA * sourceB;

FBD_MATH Structure

Input Parameter	Data Type	Description
EnableIn	BOOL	Enable input. If cleared, the instruction does not execute and outputs are not updated. Default is set.
SourceA	REAL	Value of the multiplicand. Valid = any float
SourceB	REAL	Value of the multiplier. Valid = any float

Output Parameter	Data Type	Description
EnableOut	BOOL	Enable output.
Dest	REAL	Result of the math instruction. Arithmetic status flags are set for this output.

Example
Multiply float_value_1 by float_value_2 and place the result in multiply_result.

-    Ladder Diagram

-    Function Block

-    Structured Text

multiply_result := float_value_1 * float_value_2;

File name: PLC-19_IS_CMI-MUL.pdf
File size: 419.36 KB