I want to connect some A4U CPU to a OPC server; the goal of this project is to get data from CPU (alarms, production data...) and to write them in real time on a database (MySQL for example) located in the server. Thanks to that, we could treat data to help maintenance (alarms in real time) or help production by controlling production rates in real time too. What is the best way (harware and software) to set up it? Thanks for your replies.