Hi Andreas, well I just had a look ... this just checks if the channel is active ... while this should be better than nothing for TCP connections, for UDP it probably won't be much use. But we should probably help Lukasz get his PR ready as I think this is an important extension.
Chris -----Ursprüngliche Nachricht----- Von: Andreas Vogler <[email protected]> Gesendet: Donnerstag, 12. August 2021 11:16 An: [email protected] Betreff: Re: ModBus observe connection state... Thx Chris, it’s ok for me to check the isConnected flag. > On 12.08.2021, at 09:37, Christofer Dutz <[email protected]> wrote: > > Hi Andreas, > > We introduced a "ping" method into the API of the PlcConnection ... however I > think we never implemented that in any of the protocols. > > However I think we really should come up with dummy operations for each > protocol which we can use to test the connection ... I mean ... even asking > for a resource that doesn't exist and the PLC politely tells us so, it a good > check. > > Chris > > -----Ursprüngliche Nachricht----- > Von: Andreas Vogler <[email protected]> > Gesendet: Donnerstag, 12. August 2021 09:31 > An: [email protected] > Betreff: Re: ModBus observe connection state... > > Never mind, seems that I can periodically check the isConnected flag… > >> On 12.08.2021, at 08:21, Andreas Vogler <[email protected]> >> wrote: >> >> Hi, >> >> How can I check the state of a connection? Especially if it is lost. >> >> I have a ModBus connection and when I turn off the ModBus server I do not >> get any error. >> >> I have found the orTimeout option at the response object… >> >> But I want somehow detect if a connection is lost, so that I can do a >> reconnect… >> >> Hope someone can give me an advice how this is typically done with Plc4x. >> >> Regard, >> Andreas >
