Hi, I'm trying to modify the OB77B screen, but it says I need to update the operating system because I'm using a newer version of WinCC. I'm using WinCC 2008 SP3. When I try to update, it says transfer aborted. I'm struggling to understand why. I'm connected to the S7-300 fine, and there must be some communication if it knows I need to update the OS? I've tried different baud rates and connection types. Do you sometimes need to go to a transfer mode on some of the OP units?
Thanks
Russ
Thanks
Russ