Windows 7 and AdvancedHMI

[gbradley]

I have a simple application that was running great on my old WindowsXP laptop, but when I installed it on a new Windows 7  Thinkpad machine, I get Communication issues.
Version 3.5.8
The error across the screen is Send QueFull may have lost connection.
In the Internet Protocol section of the Laptop, I change the IP address on Version 4 (TCP/IPv4) to XX.XX.X.1
The laptop connects to the Compactlogix fine, but I wasn't sure if there is something that I should do differently with Win 7 compared to XP?
The Windows XP laptop connects fine using the same AdvancedHMI Shortcut.
Thanks for any suggestions

[Archie]

My guess is the new PC is faster and surfaced a problem with the faster requests. The Send Que full occurs when requests are made faster than the PLC can respond.

I do not know in that version, but there may be a fix to help. Open EthernetIPforCLXCom.vb and search for "Me.BeginRead". If you find it, then remove the word "Begin " and see if that resolves the problem.

[gbradley]

I looked at the code, and there is a "Me.Read", but no "Me.BeginRead" that I could find.
     '23-OCT-11 Moved before the next 4 lines
                                    Me.Read(GroupedSubscriptionReads(i).TagName, GroupedSubscriptionReads(i).NumberToRead)
                                    'elapsed = timer.ElapsedMilliseconds

The laptop communicates fine through RSLinx AB_ETHIP, so I don't think that it is my IP settings, but I'm not sure.
What I am not familiar with is the fact that the there are two Internet Protocols:
Internet Protocol Version 6 (TCP/IPv6), and  Internet Protocol Version 4 (TCP/IPv4)
I have not been changing the  Internet Protocol Version 6 (TCP/IPv6)

[Archie]

Are you doing any read/writes in code?

[gbradley]

No read Writes, just monitoring N values and B3 bits

[Archie]

Try putting a 500 in the PollRateOverride of the EthernetIPforCLXCom1

[gbradley]

Awesome!
I changed it to 500
  '* Avoid a 0 poll rate
        If PollRate <= 0 Then
            PollRate = 500
        End If
and it seemed to work.
Thanks
You Rock!