Help - RSLinx - DDE Send/Receive Failed

Hey guys, I hae an RSLinx that will not connect. So what I have is 5 machines, communicating in series from a DH485 to a coupler to ethernet to a SLC 500.

I have RSLogix giving me a message that none of my equipment is able to start. I am able to ocnfigure the drivers, but I get the big red X on my equipment and a message from my HMI that says DDE Send/Receive Failed.

Any ideas?

Hello Guys, I dug through the site and found some great info. So I think I can get it.

iadapt,

Please post what you discovered so we can all learn.

james