Issue on Client->Connected() function

[mc]

Hello everybody.
I am experiencing issues on the Client->Connected() function on a s7-1500 CPU.
Using the bleow piece of code:

while (!TerminateCondition())
{
if (Client->Connected())
{
PerformDataExchange();
sleep(TimeRate); // exchange time interval
}
else
if (Client->Connect()!=0)
sleep(10); // small wait recovery time
}

I am able to connect and read without any issue.
When I unplug the ethernet cable from the CPU, the Client->Connected() keeps returning true value, so it does not recognize that the PLC has been disconnected.

Any suggestion how to fix it?

Thanks in advance

[Davide Nardella]

Hi,
Connected flag is only a "reminder" to remember if you connected your client.
There is no way for a client (a generic TCP/IP client, not only Snap7) to know that tha cable was disconnected until you try to communicate.
Try to implement a polling.

[mc]

Thank you, I thought the function Connected() was handling a request to the PLC to check the connection status.
I was able to work with no issues using by monitoring the status of the PLC.

Thanks again