I am logging in an monitoring multiple projects (3 at the moment) running on three different PLC's using a network hub. Once I start running I lose communication after a period of time (< 15 - 20 s) to one of the PLC's. All 3 applications are running fine, just no communications (LOGIN) to one of them. Any ideas or is this not possible due to limitations of TCP/IP or CoDeSys?
Doug
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TimvH hat geschrieben:
Make sure all devices have different IP adresses.
Hi,
I just wanted to know what are the limitations of TCP or UDP protocol:
Distance
No of bytes for each frame
No of nodes
and other limitations if any .
Regards,
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Greetings everyone,
I am logging in an monitoring multiple projects (3 at the moment) running on three different PLC's using a network hub. Once I start running I lose communication after a period of time (< 15 - 20 s) to one of the PLC's. All 3 applications are running fine, just no communications (LOGIN) to one of them. Any ideas or is this not possible due to limitations of TCP/IP or CoDeSys?
Doug
Doug,
I am monitoring 3 PLC's using CoDeSys on this computer as I write this with no trouble. I sometimes monitor 5.
There's no problem with CoDeSys or TCP/IP. It may be that you're using a hub. I found that using a switch insteadof a hub works better.
Make sure all devices have different IP adresses.
Hi,
I just wanted to know what are the limitations of TCP or UDP protocol:
Distance
No of bytes for each frame
No of nodes
and other limitations if any .
Regards,
does this mean you have 3 instances of codesys running on the PC?
yes that is a bit much.
better use visualisation or ODP.