LEN(in)

String length of operand in

LEFT(str,size)

Left inital string of given size of string str

RIGHT(str,size)

Right initial string of given size of string str

MID(str,size,pos)

Partial string of str of given size at position pos

CONCAT('str1','str2')

Concatenation of two subsequent strings

INSERT('str1','str2',pos)

Insert string str1 in string str2 at position pos

DELETE('str1',len,pos)

Delete partial string (length len), start at position pos of str1

REPLACE('str1','str2',len,pos)

Replace partial string of lenght len by str2, start at position pos of str1

FIND('str1','str2')

Search for partial string str2 in str1

SR

Bistable function block is set dominant

RS

Bistable function block is set back

SEMA

FB: Software Semaphor (interruptable)

R_TRIG

FB: rising edge is detected

F_TRIG

FB: falling edge is detected

CTU

FB: Counts upv

CTD

FB: Count down

CTUD

FB: Up/down counter

TP

FB: trigger

TON

FB: on delay timer

TOF

FB: off delay timer

RTC

FB: real-time clock