I'm using both RSLinx and some third party stuff to talk to PLC-5's and SLC-500's via ethernet. This all works fine as long as everything is on a LAN.
I've tried making the connection over the internet with access to the network which the PLC is on being through a router. I have not been able to get this to work. I suspect the problem is that the router is not allowing communications except on certain ports. And, I can't figure out what port or ports are being used. I see no place in either RSLinx or in the 3rd part software to specify any port numbers so I assume it's hard-coded somewhere.
Does anyone have any experience in this area that could give me some guidance?
Thanks.
I've tried making the connection over the internet with access to the network which the PLC is on being through a router. I have not been able to get this to work. I suspect the problem is that the router is not allowing communications except on certain ports. And, I can't figure out what port or ports are being used. I see no place in either RSLinx or in the 3rd part software to specify any port numbers so I assume it's hard-coded somewhere.
Does anyone have any experience in this area that could give me some guidance?
Thanks.