Modulo (MOD)

When enabled, the MOD instruction and the operator divides Source A by Source B and places the remainder in Dest. This is done using the algorithm:

Dest = Source A – (truncate ( Source A / Source B) * Source B)

Available Languages

Ladder Diagram

Operands

IMPORTANT: Unexpected operation may occur if:

Output tag operands are overwritten

Members of a structure operand are overwritten

Except when specified, structure operands are shared by multiple instructions.

There are data conversion rules for mixing numeric data types within an instruction. See Data conversions.

Ladder Diagram

These are the operands for Ladder Diagram.

Operand	Data Type	Format	Description
Source A	SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL	immediate tag	Value of the dividend.
Source B	SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL	immediate tag	Value of the divisor.
Dest	SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL	tag	Tag to store result of the instruction.

Affects Math Status Flags

Major/Minor Faults

A minor fault will occur if:	Fault Type	Fault Code
Source B = 0	4	4

See Index through arrays for array-indexing faults.

Execution

Ladder Diagram

Condition/State	Action Taken
Prescan	N/A
Rung-condition-in is false	Set Rung-condition-out to Rung-condition-in
Rung-condition-in is true	Set Rung-condition-out to Rung-condition-in Dest is set (to the remainder) as described in the Description section.
Postscan	N/A

Examples

Ladder Diagram

Divide dividend by divisor and place the remainder in remainder. In this example, 3 goes into 10, three times, with a remainder of 1.

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