When the PLC power is off, no exception is thrown

[alitahaozturk]

In my project, where I use the example code shared below, I always start by opening a connection using the baglantiAc() method. Then, I use the DegerOkuInt() method to check if the connection is established (isconnected) and to read values. Generally, there is no issue, but when the power to the PLC is off and the connection cannot be established, no exception is thrown. The application freezes at that point. After restarting, it reconnects and works again. This situation always requires my manual intervention. How can I ensure an exception is thrown when the connection is lost?

[ynioba]

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[lvlaimao]

When you fail to read or write, you need to write reconnect logic

[EERichardji]

I encountered the same issue and found that the IsConnected property only reflects the socket communication status. It does not automatically update when the socket is interrupted. Therefore, this property can only be used to determine the PLC connection status immediately after calling Open or Close methods, but it cannot provide real-time awareness of the PLC's actual connection state at any given moment.