We are building a water plant in the Bahamas and we designed and built the equipment and are doing the controls with OPTO22 hardware and software. We have a number of cabinets with EB1 brains on IO racks and an S1 running the show. There is one subsystem however that is being outsourced by our client which is going to be running on and Allen Bradley CompactLogix L33. This was brought to our attention too late and we already shipped the cabinets and don’t have spare IO that they want us have for interfacing with this other piece of equipment. I would prefer hard wired IO, but since that’s already done, we’re looking at using Ethernet to send and receive data.
I have probably built about 20-25 control systems for water plants over the years but I have never had to get into sharing data over networks with other brand PLCs. Can somebody give me some instruction on how this is set up? I recently taught myself modbus TCP protocol with pointers from a few of the very helpful engineers at OPTO, so I’m sure I can get the swing of this too.
The AB system is going to have about 10 digital outputs to me, 2 digital inputs from me, an analog input from me, and an analog output to me. Both of us would be running logic control, but I need to be able to issue start commands, and they need to be able to send me status signals back and so forth. So it’s not just a simple extension of IO, where one system is Master and the other is Slave. That’s what’s confusing me because the instructional media I’ve come across talks about how to configure opto22 hardware to act as expansions of existing AB control systems, and that’s not really what I have going on.
I have OPTO hardware in my shop that I can play around with, but unfortunately I don’t have any AB stuff to set up and learn on. I’ll need to start a conversation pretty soon with this other supplier on how we’re going to integrate our systems, so any help I can get before then would be great!