We have just finished a large project using an EZ automation touchscreen and we found that the update speed of the screens was verypoor, in the neighborhood of 8 seconds on a switch to a new screen. Once the screen was displayed and synch'ed the update speed was normal. The time was even greater before changing the addresses of the alarms so that they were sequential. The number of tags was around 1100 and we used universal ethernet communications at 10 mb. My question is, would using an AB panelview provide much better performance or is the communications of the PLC port going to be a bottleneck anyway? For this project we used an SLC 5/05, but in the past we have had similar problems with SLC 5/03's using CMore or EZAuto HMI's using the DH485 protocol.