I must tell you I am very impressed with your implementations of ODEs in a PLC environment.
More and more control algorithms being discussed in Control forums require manipulations of ODEs, and it is a great tool you are providing us for furthering our capacity for process control.
Congratulations for the work, and thank you for sharing it with us.
P.S. And this gift arrives on Friday the 13th. For us Westerners, it would seem some magic might be involved... D.C,