Our client application works fine on Windows XP.
The application scans approx 10 registers without failures at a scan rate of 100 milli secs.
When used on Windows 7 the app works for a few seconds and is then unusable.
If the scan rate is decreased to 10 seconds the app works without failures
If a scan rate of 2.5 seconds is used some failures are noticed.
The link http://modbus.control.com/thread/1341225864
refers to many similar issues.
However a fix suggested below did not work.
netsh interface tcp set global autotuninglevel=disabled
Help moderator please... I would like to increase the points 1000 but "Edit question" doesn't allow ??