Tool collection of functions for bit, number and mathematical operations

Dear all,

This article provides a tool collection of operations. -The link is in the end of the article-I think it would be useful for all programmers. Really, it's interesting.
The functions are grouped in two categories and are briefly described below.

• Bit and number operations
• Mathematical operations

The detailed description of each function example is available in the appended documentation with the following structure:

• Description of the functions
• Block parameter lists of the functions
• Example of an application
• Technical data

The code for the functions and examples in form of a STEP 7 project or a STEP 7 library can be downloaded for a fee using AVC credit points.

Brief overview:

• Random number generator
  The RANDOM function is a random number generator implemented as 16-bit feedback shift register. The random numbers are in the range of
  -32768 to +32767.
  
• Determination of the parity of data elements
  The PARITY function (FC 12) allows the parity determination of byte, word or double word elements and DB blocks for the memory areas “input”, “flag” and “data block”.
  
• Determination of the active bit position in a flag word
  The “CalcBitPos” function determines the position of the set bit in an input data word (16 bit) and returns it as an INT value via the OUT parameter “bit_pos”.
  
• Edge detection in a 32-bit field
  The function “Monitor32” checks whether a bit has changed in a 32-bit data word since the last function call.
  
• Incremental counter with a limit of 2,147,483,647
  The function block “Counter” (FB 2) enables you to implement the incremental counting function with a limit of 2,147,483,647.
  

• Calculate the xth root of a REAL number
  The function “X-ROOT” calculates the xth root from an input floating-point number (REAL). The result is of type REAL and is returned via an OUT parameter (result).
  
• Calculation of statistical values in automation systems
  The SPC01 function calculates statistical values, namely the highest value, the lowest value, the arithmetic mean and the standard deviation.
  
• Matrix operations in SIMATIC systems
  Library with functions for implementing various matrix operations, such as addition, subtraction, multiplication, inversion und transposition.
  
• Multidimensional interpolation
  Function blocks for the interpolation of functions with one, two or three independent variables.
  

Download information
The documentation is free of charge. The appended downloads of the software code are available for a fee.
Payment is effected via SIMATIC Card / Automation Value Card (AVC). For the code, "120 Credits" will be charged from your AVC account.

for downloading the Step 7code of these fuctions try this link. From the same link you can download the documentation.

Best regards, and have a nice day.

It would be nice if Siemens could provide this information free of charge.