ASCII String Instructions
Use the ASCII string instructions to modify and create strings of ASCII characters.
Available Instructions
Ladder Diagram and Structured Text
Function Block
Not available
If you want to: | Use this instruction: |
|---|---|
Add termination characters or delimiters to a string | CONCAT |
Delete characters from a string (e.g., remove header or control characters from a string) | DELETE |
Determine the starting character of a sub-string | FIND |
Insert characters into a string | INSERT |
Extract characters from a string | MID |
You can also use the following instructions to compare or convert ASCII characters:
If you want to: | Use this instruction: |
|---|---|
Compare a string to another string | CMP |
See if the characters are equal to specific characters | EQ |
See if the characters are not equal to specific characters | NE |
See if the characters are equal to or greater than specific characters | GE |
See if the characters are greater than specific characters | GT |
See if the characters are equal to or less than specific characters | LE |
See if the characters are less than specific characters | LT |
Rearrange the bytes of an INT, DINT, or REAL tag | SWPB |
Find a string in an array of strings | FSC |
Convert characters to a SINT, INT, DINT, or REAL value | STOD |
Convert characters to a REAL value | STOR |
Convert a SINT, INT, DINT, or REAL value to a string of ASCII characters | DTOS |
Convert a REAL value to a string of ASCII characters | RTOS |
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