Modbus TCP - Send Que Full

[iamjer76]

I have an application that is replacing an old Wonderware application. There are about 45 recipe parameters I have to send to the PLC which currently works in the Legacy application. The new AdvancedHMI application must be writing too fast as now when I try to write the recipe parameters down, I am getting the "Send que full, may have lost connection or data request too fast" error. I have changed the PollRateOverride on the PLC Driver to 500 and then again to 1000, but the results were the same. I have added a System.Threading.Thread.Sleep(50) after every 10 recipes I write, and I still get the error. My assembly version is 3.9.8.18

Is there something else I might be able to try? I am really at a loss.

Thanks,
Jeremiah

[Archie]

This issue was just recently discovered this week and a fix has been put in for the next version. To work around with the version you are using, you would need to add a sleep time in between about every 5 writes.

[iamjer76]

Thanks Archie. I'll give that a shot.

[iamjer76]

That did the trick...mostly. I loaded 5 sets of recipes and the 3rd recipe gave the error. 20% failure is much better than 100%. I may be able to limp by until the new version with the fix is available.

[Archie]

Version 3.99a is now available that should fix this issue.