Plc_5 Ethernet

Hello,
I am trying to communicate with a PLC-5/40C that has a 1785-ENET card. I am trying to connect straight from PC to PLC using a built in 10BaseT connection on my PC. I can't see the PLC through RS LINX and I also do not get the "Link" light on the transiever. Do I have the cable wired wrong? I got a drawing for point to point connections off an A/B doc. What exactly fires the link light? Do you think I have a cable problem or a setup problem? Thanks

Are you sure about the cable and that the connection is good...ie did you make the cable? If so they should be swapped around like this.
I assume you setup the enet with proper addresses etc.

First thing is to get hardware connection:
If all you have is straight ethernet cables, you will need two of them and a ethernet hub or switch. Otherwise you must use crossover cable as rsdoran suggested. There are plenty of resources on the web describing ethernet color codes and wiring.. Here is another one.
To test hardware connection try to ping the PLC:
- open dos box and type something like:
ping 192.168.0.10
where the numbers after ping command represent IP address of your PLC. Next thing you should do is make sure you have proper configuration of all nodes.

If nothing seam to work, set your PC's IP address to something
like 192.168.0.1 and all other devices should use addresses like
192.168.0.2 (high-tech wallclock)
192.168.0.3 (fridge)
192.168.0.4 (microwave)
192.168.0.5 (plc)
192.168.0.6 {neighbour's webcam)
192.168.0.7 (X-Box)
192.168.0.8 (plc2)
192.168.0.9 {printer}
192.168.0.10 {girlfriends laptop)
192.168.0.11 {grandma)
192.168.0.12 etc.

Make sure that all of them use SAME subnet mask (255.255.255.0 works for small networks, if you need to connect more than some 250 devices, try subnet mask for class-B network: 255.255.0.0).
Don't forget the PING!
Oh one more thing: RSLinx will not "Autodetect" your PLC when conecting through ethernet - you have to put PLC's IP address manually in the ETH_1 driver configuration table.

Hope it helps,