Natural Logarithm
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Numerik/nat%C3%BCrlicher%20Logarithmus_FB.png)
This function block computes the natural logarithm, i.e. the logarithm to the base e (Euler's number), from the absolute value of the input signal. The result is presented at the output Y.
Operation
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Numerik/nat%C3%BCrlicher%20Logarithmus_Formel.png)
Signals
Name | I/O | Type(s) | Function |
---|---|---|---|
X | I | FLOAT | Operand |
Y | O | FLOAT | Result |
Comments
The function sets the output Y to -3.4E38 if the value X is zero.