mid

 Function - Extract characters of a string at any position.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	STRING				Character string.
NBC	DINT				Number of characters to extract.
POS	DINT				Position of the first character to extract.

Outputs

Output	Data Type	Range	Unit	Description
Q	STRING			String containing the first NBC characters of IN.

Remarks

• The first valid character position is 1.

FBD Language Example

FFLD Language Example

• In the FFLD Language, the operation is executed only if the input rung (EN) is TRUE.
  • The output rung (ENO) keeps the same value as the input rung.
  • The function is executed only if EN is TRUE.
  • ENO keeps the same value as EN.

IL Language Example

• In the IL Language, the first input (the string) must be loaded in the current result before calling the function.
  • Other arguments are operands of the function, separated by comas.

Op1: LD   IN
     MID  NBC, POS
     ST   Q

ST Language Example

Q := MID (IN, NBC, POS);

See Also

• Addition +
• delete
• find
• insert
• left
• mlen
• replace
• right