By and large it was a much more simple process that starting from scratch on WinCC V8 as we would have had to create all of our faceplates from scratch and draw all mimics again.
Customer now
has control of both systems from the control room. They are suffering however
from the lack of ability to have multiple screens on the same machine in
kiosk mode i.e. the PC boots up straight in to a multi screen SCADA without
any actions necessary from the operator, and the windows functions are locked
out. It seems odd that this is marketed as an alternative to WinCC V8 when
this is not an option.
They informed us after the SCADA was complete that
they would like 4 screens and this may become an issue but this feature is coming in
the next version of TIA portal (V21).