Kestralcontrols Posted January 14, 2019 Report Share Posted January 14, 2019 Hi, I have a remote PLC that I can download a new project, but it will not connect to online mode after the download has completed. I get the following message when I try to go online: "Online mode was terminated due to a communication error. Please check the connecting cables" I can download a project with no issues, so I know the communication does work. I know the download has been because the web pages have changed inline with the new download. Any ideas, please Quote Link to comment Share on other sites More sharing options...
Saragani Posted January 14, 2019 Report Share Posted January 14, 2019 Try rebooting the PLC and see if it helps. Quote Link to comment Share on other sites More sharing options...
Kestralcontrols Posted January 14, 2019 Author Report Share Posted January 14, 2019 I've tried rebooting, but still no online connection. I think it may be a problem with port 3335 I'm assuming ports, 80, 22 & 3335 should be forwarded to 192.168.0.250 I don't have access to the router, so I'm waiting on someone checking the router configuration. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Ausman Posted January 14, 2019 MVP 2022 Report Share Posted January 14, 2019 9 hours ago, Kestralcontrols said: I can download a project with no issues, so I know the communication does work. This heavily implies that it is something within your program causing the error. An inadvertent error/typo/change in comms somewhere? cheers, Aus Quote Link to comment Share on other sites More sharing options...
tklass Posted April 21, 2022 Report Share Posted April 21, 2022 Hi @Kestralcontrols I just ran into the same issue i resolved it by clicking on PC-PLC communications then click on the arrow by "Ports" change the online port from whatever it has there to what is in the manual which is "3335" click close and try it again Quote Link to comment Share on other sites More sharing options...
Angelet Posted April 24 Report Share Posted April 24 Hola, tengo el mismo problema. He intentado ponerme Online pero no me deja. Aparece el mensaje de error que aparece en la anterior conversación. He cambiado el puerto, he reiniciado el Plc y no consigo ponerme Online,¿ alguna sugerencia? El puerto mío actualmente es el 3335. Quote Link to comment Share on other sites More sharing options...
Dave Posted April 25 Report Share Posted April 25 After your initial download, can you still download another program change? if not, then check your IP address settings in the project. If you downloaded a different address than originally set, you will lose comm's Quote Link to comment Share on other sites More sharing options...
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