X to the Power of Y (EXPT)
The EXPT instruction takes Source A (X) to the power of Source B (Y) and stores the result in the Destination. If Source A (X) is negative, Source B (Y) must be a non-fractional value or a minor fault will occur.
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 A | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL | immediate tag | value to exponentiate |
Source B | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL | immediate tag | exponent |
Dest | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL | tag | Tag to store the result of the instruction. |
Affects Math Status Flags
Conditional
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 = value of Source X to the power of Source Y. |
Postscan | N/A. |
Examples
Ladder Diagram
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