Negate (NEG)

When enabled, the NEG instruction and operator subtract the Source value from zero.

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

Operand	Data Type	Format	Description
Source	SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL	immediate tag	Value to negate
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

None specific to this instruction. 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 = 0 - Source.
Postscan	N/A

Examples

Ladder Diagram

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