If you are using TWAIN and don't have an ADF you would need to compile the scans yourself.
You have to double click before pressing OK to select the printer found on the network.
It's not very clear.
However now it works.
Question: It's possible to do more scans from the floor (no feeder) but sent to the PC, via the network, a single pdf file?
Or I have to send multiple pdf files and then manually merge them with another software?
Since the Scan driver installation begins by looking for a network device the answer would be yes. The TWAIN installer is here for x86 and here for x64 The USB scan driver is an entirely different thing and definitely can't do network scan.
Just make sure you enable it in CWIS first.
It's possible to scan directly from my PC via TWAIN driver/utility application with the printer without USB cable?
My WorkCentre 6605V DN it's connected via network only and when I use twain driver from photoshop, for example, I always have error "device not ready".
No problem by scanning from the printer to the PC with FTP method.