I have a Twido PLC with the 499TWD01100 Ethernet link I can go on line over Ethernet. I need to read and write to Data area from RSLogix over the Ethernet link. has any one managed to do this?? or any thoughts on how to do this? I am using the Logix msg function but will not connect (also not liking %MW35) as address.

 

I believe that the only protocol you can use in this case is Modbus TCP, which protocol does Logix msg use?

Good luck,

Gonzalo Jimenez Yamasaki
http://www.linkedin.com/in/gonzalojimenezyamasaki
http://sites.google.com/site/gonzalojimenezyamasaki/

 

hutber,

It would be great if the *logix PLC's spoke modbus/tcp, but unfortunately they don't. (The C*logix can, but only with an add-on card from Prosoft).

Alternatively, you could also add a DOIAP to your network to translate between EtherNet/IP (logix) to Modbus/TCP (twido). I've used these on many occasions with very good results.

Hope this helps!