Modulo (MOD)

The MOD instruction divides Source A by Source B and places the remainder 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 dividend
Source B*	SINT INT DINT REAL	immediate tag	value of the divisor
Destination	SINT INT DINT REAL	tag	tag to store the result

*Data Conversion: SINT and INT tags are sign-extended.

-    Function Block

Operand	Type	Format	Description
MOD tag	FBD_MATH	structure	MOD structure

-    Structured Text
Use MOD as an operator in an expression. This expression divides sourceA by sourceB and stores the remainder in dest.

dest := sourceA MOD sourceB;

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 dividend. Valid = any float
SourceB	REAL	Value of the divisor. 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
Divide dividend by divisor and place the remainder in remainder. In this example, 3 goes into 10 ten times, with a remainder of 1.

-    Ladder Diagram

-    Function Block

-    Structured Text

remainder := dividend MOD divisor;

File name: PLC-21_IS_CMI-MOD.pdf
File size: 418.71 KB