Hi AlessioD,
Thank you for your answer, it's quite useful. Now I know can increase Pause time as I want, because my cFP-2020 is connected with no module. In fact this module controls some FP-1001 via 485 port, and port polling doesn't refer to Pause time (I hope....).
Anyway, even with an increased Pause time of 1000 ms, I get 100% CPU usage. I will check for further improvements...
Thanks again, and have a nice day.
graziano