Beifu PLC string type string operation

Based on Beifu PLCString The function of type is described as follows ：

1、 The connection of two strings ：CONCAT

VAR_INPUT

STR1 : STRING(255);

STR2 : STRING(255);

END_VAR

IL Example :

LD ‘SUSI’

CONCAT ‘WILLI’

ST Var1 (* Result is ‘SUSIWILLI’ *)

ST Example :

Var1 := CONCAT (‘SUSI’,‘WILLI’);

2、 Delete a continuous character at a certain position ：DELETE

Delete the first POS Location （ from 1 From the beginning ） continuity LEN The remaining string after the length is used as the return value ;

VAR_INPUT

STR : STRING(255);

LEN:INT;

POS:INT

END_VAR

IL:

LD ‘SUXYSI’

DELETE 2,3

ST Var1

The result is ：’SUSI’

ST:

Var1 := DELETE (‘SUXYSI’,2,3);

The result is ：’SUSI’

3、 Find substring in string ：FIND

Grammar format ：FIND(STR1,STR2)

function ： stay STR1 Find STR2 First occurrence , Return as return value ;

          VAR_INPUR

                 STR1:  STRING(255);

                 STR2:  STRING(255)

          END_VAR

Example ：

IL:<