How does one go about doing higher end mathematical computations using plc functional block diagram (eg. abb ac31graf)

I wish to compute some mathematical equations involving logarithmic values and x raised to y calculations. Is it possible to have ready made log , x^y , trigonometric and exponential functionality in plc programming software involving float operations.

 

I would recommend using a plc that supports floating point math and also has a programming tool that offers more than just function block. WAGO offers a variety of powerful and cost effective controllers.

Their prgramming tool is IEC 61131 compliant and supports all 5 programming languages that are part of the standard plus and addtional 6th language. The (ST) structured text program language is very similar to VB or C and simplifies advanced math execution (log, x to y, etc). Even better, the programming software is sold as a site license so you only pay for it once ($750 USD).