Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 499)

L-force | PLC Designer
IEC Operators and additional norm extending functions

DMS 3.2 EN 02/2011 TD29 497
9.10.2 SQRT
PLC Designer IEC operator: Returns the square root of a number. IN can be type BYTE,
WORD, DWORD, INT, DINT, REAL, SINT, USINT, UINT, UDINT. OUT must be type REAL.
Example in IL:
LD 16
SQRT
ST q (* Result is 4 *)
Example in ST:
q:=SQRT(16);
Example in FBD:
9.10.3 LN
PLC Designer IEC operator: Returns the natural logarithm of a number. IN can be type
BYTE, WORD, DWORD, INT, DINT, REAL, SINT, USINT, UINT, UDINT. OUT must be type
REAL.
Example in IL:
LD 45
LN
ST q (* Result is 3.80666 *)
Example in ST:
q:=LN(45);
Example in FBD: