View Single Post
Old September 10th, 2010, 04:29 PM   #1
Lifetime Supporting Member
United States

harryting is offline
harryting's Avatar
Join Date: May 2002
Location: Puget Sound
Posts: 1,918
Network Redundancy (AB), what makes sense at HMI and Rack level?

We had a discussion here internally on the best practice to do redundant network and I would like to seek some feedbacks from the experts here.

Someone suggested Ethernet/IP (simplex) and Controlnet both at the HMI level. To me, it makes more sense to do redundant E/IP instead because it's less $ and one do not have to switch over the I/O or OPC driver for the HMI project.

At the rack level, from the main PLC rack to remote I/O, I tend to perfer redundant Controlnet. Is there any good reason to consider Ethernet/IP for that?
  Reply With Quote