W5500 Modbus TCP Master in c

I would like to implement a W5500 Modbus TCP Master in c if possible with a LPC54005 MCU.
I see that there is a Wiznet c library but I do not see Modbus TCP support.
Would this be a reliable setup?
How many points per second could I poll.
Any suggestions would be helpful.

Ditto. I am also working on this, but I use a TI F28335 MC.

I wrote my own libs and drivers, and it starts to work together. However, I still have almost 50% of errors after a couple weeks of coding.

I have a multi-task process, so I poll S0_IR and S0_SR every 10ms.