Hey guys,I am working on a prototype of a bike wash machine which consists of HMI DOP B series here's the link to the manual https://www.deltaacdrives.com/deltadop-b05s111-human-machine-interface and interfacing to arduino mega 2560.The Hmi would consist GUI in the form of buttons,user would select which wash he wants to opt,the arduino is controlling motors and reading data from sensors to send it to the HMI which will be displayed on the screen,so my doubts are as follows
1.Who will be the slave and master?
2.Which modbus library should i use (would be working with boolean value(coil) and register(holding register)?
3.Is arduino faster than plc?