Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 641)

L-force | PLC Designer
PLC Designer Libraries

DMS 3.2 EN 02/2011 TD29 639
LEFT
Provided by standard.lib.
Left returns the left, initial string for a given string. Input STR is type STRING, SIZE is of
type INT, the return value of the function is type STRING.
LEFT (STR, SIZE) means: Take the first SIZE character from the right in the string STR.
Example in IL:
LD 'SUSI'
LEFT 3
ST VarSTRING1 (* Result is 'SUS' *)
Example in FBD:
Example in ST:
VarSTRING1 := LEFT ('SUSI',3);
Note!
String functions are not "thread safe": When using tasks, string functions may only
be used in a single task. If the same function is used in different tasks, there is a
danger of overwriting.
RIGHT
Provided by standard.lib.
Right returns the right, initial string for a given string.
RIGHT (STR, SIZE) means: Take the first SIZE character from the right in the string STR.
Input STR is of type STRING, SIZE is of type INT, the return value of the function is of
type STRING.