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IEC 61131-3 Standard functions

14-8

DDS EN 2.3

14.3.3 RIGHT

Returns a right start string of a string

• STR is of type STRING, SIZE of type INT, the return value of the function type STRING.

• RIGHT (STR, SIZE) means: Take the first SIZE characters from the right in the string STR.

Examples

IL ST FBD

LD ’SUSI’

RIGHT 3

ST Var1 (* Var1=’USI’ *)

Var1:=RIGHT(’SUSI’,3);

14.3.4 MID

Returns a segment of a string

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

STRING.

• MID (STR, LEN, POS) means: Get LEN characters from the string STR starting with the

character at POS.

Examples

IL ST FBD

LD ’SUSI’

MID 2,2

ST Var1 (* Var1=’US’ *)

Var1:=MID(’SUSI’,2,2);

14.3.5 CONCAT

Concatenation

Concatenating two strings

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

Examples

IL ST FBD

LD ’SUSI’

CONCAT ’WILLI’

ST Var1

(* Var1=’SUSIWILLI’ *)

Var1:=CONCAT

(’SUSI’,’WILLI’);

14.3.6 INSERT

Inserts a string into another string from a specific position

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

STRING.

• INSERT(STR1, STR2, POS) means: Insert STR2 into STR1 after the POS-th position.

Examples

IL ST FBD

LD ’SUSI’

INSERT ’XY’,2

ST Var1

(* Var1=’SUXYSI’ *)

Var1 := INSERT

(’SUSI’,’XY’,2);

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