Hi,

I have a PLC in my home network. This PLC is limited to 8 TCP connections.
As there is nor running Linux or Windows I am not able to debug the open TCP connections. But I want to test if there is a program fault of the PLC program because sometimes the PLC says: no more TCP connections available.
But on my programing I should have a maximum of 4 TCP connections


Is there a way to show the open TCP connections of this PLC?
The PLC have the IP 192.168.1.20 and is connected to a router (with ROOTer Firmware (OpenWRT)). So I have root access to the router and also on another PC (Linux or Windows).

Somebody can help?

You could find the number of resources at the computers but unless you have a high level PLC I rather doubt you can log into it to find out much.

Not even sure what is causing this connection issue just yet but all sorts of stuff could be running. More than a few command line tools might be used to diag that depending on OS.

What is this PLC?

Others may have some ideas?

It is a Phoenix Contact ILC PLC.
There is a Cyclon II FPGA used, so I have no chance to get an interface like telnet.

Anyway, I found already a problem in the PLC program and fixed it. Now it looks like better...

What was the problem?

Anyway, glad you fixed it.