Elements of the standard library
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Structured Text |
Description |
|---|---|
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LEN(in) |
String length of operand in |
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LEFT(str,size) |
Left inital string of given size of string str |
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RIGHT(str,size) |
Right initial string of given size of string str |
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MID(str,size,pos) |
Partial string of str of given size at position pos |
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CONCAT('str1','str2') |
Concatenation of two subsequent strings |
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INSERT('str1','str2',pos) |
Insert string str1 in string str2 at position pos |
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DELETE('str1',len,pos) |
Delete partial string (length len), start at position pos of str1 |
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REPLACE('str1','str2',len,pos) |
Replace partial string of lenght len by str2, start at position pos of str1 |
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FIND('str1','str2') |
Search for partial string str2 in str1 |
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SR |
Bistable function block is set dominant |
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RS |
Bistable function block is set back |
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SEMA |
FB: Software Semaphor (interruptable) |
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R_TRIG |
FB: rising edge is detected |
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F_TRIG |
FB: falling edge is detected |
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CTU |
FB: Counts upv |
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CTD |
FB: Count down |
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CTUD |
FB: Up/down counter |
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TP |
FB: trigger |
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TON |
FB: on delay timer |
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TOF |
FB: off delay timer |
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RTC |
FB: real-time clock |