Lenze DDS v2.3 - Manual (Page 297)

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IEC 61131-3 Standard functions
14-5
l
DDS EN 2.3
14.2 Numerical functions
14.2.1 ABS
Returns the absolute value of a number
Examples
IL
ST FBD
LD -2
ABS
ST i (* i=2 *) i:=ABS(-2);
14.2.2 SQRT
Returns the square root of a number
Examples
IL
ST FBD
LD 16
SQRT
ST q (* q=4 *) q:=SQRT(16);
14.2.3 LN
Returns the natural logarithm of a number
Examples
IL
ST FBD
LD 45
LN
ST q (* q=3.806663 *) q:=LN(45);
14.2.4 LOG
Returns the logarithm to the base of 10 of a number
Examples
IL
ST FBD
LD 314.5
LOG
ST q (* q=2.497621 *) q:=LOG(314.5);
14.2.5 EXP
Returns the exponential function
Examples
IL
ST FBD
LD 23
EXP
ST q (* q=9.744791e+009 *) q:=EXP(23);
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