AdvHMI V361 ModTCP error 20

[ShriramPendse]

Hi,

I am using AdvHMI V361 ModTCP driver for reading/writing to ModTCP PLC . For a while comm is OK , after some time randomly I get

" com fail " exception 20 at Read function at this line
   
Else
            Throw New MfgControl.AdvancedHMI.Drivers.Common.PLCDriverException("Com Fail - " & result)
        End If
 
What could be the reason & way to solve this issue ?

Shriram Pendse

[hakan turkmen]

Hello,
My problem is same too, but still have not found the solution 

http://advancedhmi.com/forum/index.php?topic=283.0

[ShriramPendse]

Hi,
Most of the errors are due to communication , network , Received data in incorrect format .
Very strong exception handling is required to overcome these and make application robust .
Some of the experts may give guidelines how the application would continue even after exceptions
(handled or unhandled ) .