Arun Opto 22

Ken - excellent info. Thanks.

I was under the impression that MSG was only available in CompactLogix and ControlLogix (RSLogix 5000 s/w), and that an EEM (Ethernet Explicit Message) was the thing to use with SLC 5/05. My information, though, is secondhand....as it was told to me by a customer we (Opto 22) has that is (successfully) communicating from his SLC 5/05 to Opto 22 SNAP I/O.

I have a CompactLogix PLC with an 1769-IF8 AI Card. My level transmitter is a 4-20mA, and my tank level can be between zero and 35 gallons. In RSLogix 5000 I see what is called "Engineering Units" for the card configuration simply is 4,000 to 20,000....this to me in a sense is still "counts" - because in ladder I'd still have to do something to match 4,000 to 0 gallons and 20,000 to 35 gallons, right? What should I use in Ladder? I've read in the forum for a similar question that someone recommended a CPT block. I'm not sure how I'd use that to do my scaling. Any suggestions on specifics for the CPT block or another way to do my scaling? I have to imagine this is done everyday by a lot of you out there (I'm new to A-B). Thanks. Arun

Thanks Guys. Awesome. One last follow up question: If I had a ControlLogix with a 1756 AI...I wouldn't need to do this, right? It looks like perhaps you can take care of this at module configuration in RSLogix 5000...? Thanks, Arun

Thank you for the "Welcome", Bob. The modules being used with your PC104 are likely either our "G1" or "G4" modules...and YES, they can be warranty replaced, even though likely 15-20 years old (or more!). To help you identify, the G4 have an LED on them and G1 do not. - Arun

Jak, The comments you heard about Opto 22 I/O quality are surprising to me. Opto 22 is actually known for it's quality (it seems by others than the people who've posted). All Opto solid state I/O carries a lifetime warranty. We are able to do that because of the low failure rates. All aspects of our operation including design, test, and manufacturing are done within the four walls of our facility here in Temecula CA (yes "made in the USA", when the Mexico border is 1 hour and 20 minutes away...where everyone else in CA gets their PCB's done). By manufacturing in-house, we can tightly control all aspects of quality as well as engineering, sales, and marketing. If you need references, there are tens of thousands, but I could put you in touch with say a few integrators who've done many jobs with Opto I/O and controllers. Just let me know. There are lots of case-studies on www.opto22.com. Finally - I would encourage you to consider our Intelligent Remote I/O for your A-B CompactLogix or ControlLogix systems. Lots of information (white papers, tech notes) as well as videos showing how easy it is to configure communications are available at www.io4ab.com. One thing to keep in mind that what differentiates our I/O from others, when used with A-B PLCs/PACs is the availability of intelligent attributes, without any programming (not just a bus-coupler). Examples: you can configure a regular DI as a counter and return counts to A-B w/out any programming, for analogs, you can return (in addition to Analog value) "max value" w/out any programming, you can write to the clamp attribute to an AO, etc. Good Luck and Have Fun with your project. Arun Sinha, Opto 22