String to REAL (STOR)
The STOR instruction converts the ASCII representation of a floating-point value to a REAL value.
The STOR instruction converts the Source to a REAL value and places the result in the Destination.
- The instruction converts positive and negative numbers.
- If the Source string contains non-numeric characters, the STOR converts the first set of contiguous numbers, including the decimal point [.].
The instruction skips any initial control or non-numeric characters (except the minus sign in front of a number).
If the string contains multiple groups of numbers that are separated by delimiters (e.g., /), the instruction converts only the first group of numbers.
Available Languages
Ladder Diagram
FactoryTalk Design Studio
DSL - Ladder DiagramSTOR(Source,Dest);
Operands
There are data conversion rules for mixed data types within an instructions. See Data Conversion.
Ladder Diagram
Operand | Type | Format | Description | Notes |
---|---|---|---|---|
Source | String type | tag | The tag that contains the value in ASCII | String types are:
|
Destination | REAL | tag | The tag to store the REAL value |
Affects Math Status Flags
Conditional, based on programming language.
Major/Minor Faults
Type | Code | Cause | Recovery Method |
---|---|---|---|
4 | 51 | The LEN value of the string tag is greater than the DATA size of the string tag. | Check that no instruction is writing to the LEN member of the string type tag. In the LEN value, enter the number of characters that the string contains. |
4 | 53 | The output number is beyond the limits of the destination data type. |
|
See Index through arrays for operand-related faults.
Execution
Ladder Diagram
Condition | Ladder Diagram Action |
---|---|
Prescan | N/A |
Rung-condition-in is false | N/A |
Rung-condition-in is true | The instruction executes. |
Postscan | N/A |
Example
After reading the weight from a scale (weight_read is set), the STOR instruction converts the numeric characters in weight_ascii to a REAL value.
You may see a slight difference between the fractional parts of the Source and Destination.
Ladder Diagram
Provide Feedback