EZ Automation touchscreen update speed vs AB


We have just finished a large project using an EZ automation
touchscreen and we found that the update speed of the screens was very
poor, 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.
Reply to
Mike Zobrest
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Hi Mike - is a Panelview going to be quicker? probably not.. for such long updates, a configuration issue is most likely.
The first question is: Do you have anything else on the ethernet network?
Cameron:-)
Reply to
Cameron Dorrough
I removed everything from the network with no change. I am comfortable this is not a network issue or a configuration issue, I worked at length with the tech support people on it. The delay to synch the screens was in the 16 second range before I made the alarm addresses sequential. The tech support said that they have heard this type of complaint before. I was curious if anyone had ever run two similar project on an SLC with one using a Panelview and another using a CMore or EZAutomation touchscreen. I can't believe an 8 second delay is acceptable to AB, but I don't (didn't, the equipment shipped) have $4k and the programming hours available to get a Panelview in and play with it.
Reply to
Mike Zobrest
I think I would whittle down the problem, say transfer 100 or so tags and see if that takes an inordinate amount of time. You could have a ground loop/noise problem that is causing bad packets and retries, especially if the PLC and Panel have separate power sources. See if there is any differential voltage (AC or DC) between the SG of the PLC and SG of the panel with the cable unplugged. Some of AutomationDirect's products are also sensitive to a floating control voltage (One side of control xfmr not grounded), although I can't tell you why.
Reply to
Steve Cothran

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