I used an ethernet cable to connect the PLC with the Raspberry Pi. I will try with the new IP Address setting next time I go to the university.
I have set up the HW configuration and paired each analog input with an MI but I wasn't sure about the wiring. I have just found this data sheet about the wiring of V430 model (in attachment). My collegue told me that the level sensor is wired with input 9 and the temperature sensor is wired with input 10. Does that make sense ? because according to the data sheet, it looks like inputs 9 and 10 are only for digital input or temperature sensor and it looks like both input 9 and 10 are supposed to be wired with only one analog sensor, which would be AN0 in the HW configuration (if I understand correctly that #0, #1, #2, #3 on the data sheet correspend to AN0, AN1, AN2, AN3 in the HW configuration?) or am I misunderstanding something? I didn't take a look at the wiring myself. I will have a look again next time I go to the university.