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IEC 61131-3 Standard functions

14-9

l DDS EN 2.3

14.3.7 DELETE

Deletes a segment from a string from a specific position

• STR1 is of type STRING, LEN and POS of type INT, the return value of the function type

STRING.

• DELETE(STR, L, P) means: Delete L characters from STR, starting with the P th.

Examples

IL ST FBD

LD ’SUXYSI’

DELETE 2,2

ST Var1

(* Var1=’SUSI’ *)

Var1:=DELETE

(’SUXYSI’,2,2);

14.3.8 REPLACE

Replaces a segment within a string with another string

• STR1 and STR2 are of type STRING, LEN and POS of type INT,thereturnvalueofthe

function type STRING.

• REPLACE(STR1, STR2, L, P) means: Replace L characters from STR1 with STR2

starting with the P-th character.

Examples

IL ST FBD

LD ’SUXYSI’

REPLACE ’K’,2,2

ST Var1

(* Var1=’SKYSI’ *)

Var1:=REPLACE

(’SUXYSI’,’K’,2,2);

14.3.9 FIND

Looks for a segment within a string

• STR1 and STR2 are of type STRING, the return value of the function type INT.

• FIND (STR1, STR2) means: Find the position of the first character of the first occurrence

of STR2 in STR1.

• If STR2 does not occur in STR1 , the return value will be :=0.

Examples

IL ST FBD

LD ’SUXYSI’

FIND ’XY’

ST Var1 (* Var1=3 *)

Var1:=FIND(’SUXYSI’,’XY’);

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