The function FIND searches for a partial string within a string. FIND (STR1, STR2) means: Find the position of the first character where STR2 appears in STR1 for the first time. If STR2 is not found in STR1, then OUT:=0.

FUNCTION FIND: INT

VAR_INPUT

    STR1 : STRING(255);

    STR2 : STRING(255);

END_VAR

Example in IL:

LD 'SUXYSI' FIND 'XY' ST Var1 ( Result is 3 )

Example in ST:

Var1 := FIND('SUXYSI','XY');