Radian (RAD)
When enabled, the RAD instruction converts the Source (in degrees) to radians and stores the result in the Destination.
The RAD instruction uses this algorithm:
Deg2RadConvFactor=pi/180= 0.017453292
Destination = Source * Deg2RadConvFactor
Available Languages
Ladder Diagram
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Structured Text
This instruction is not available in structured text. However, in the Structured Text
Editor you can use RAD as an operator in an expression to compute the same result. Refer to
Structured Text syntax for more information on the syntax of
expressions and assignments within structured text.
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 convert to radians |
Destination | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL | tag | Tag to store the result |
Affects Math Status Flags
Conditional. See 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 = radian value of the Source. |
Postscan | N/A |
Example
Ladder Diagram
Structured Text
REAL_dest := RAD(REAL_src);
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