Pick and place code that was uploaded...

[Ken Moore 23]

Thanks for the input Bob. I wasn't aware that the CLX platform had so much capacity. The weekend debug is not an option, as we run 24/7. But....we do shut down every once and a while. I would most likely use an outside SI, because I just don't have the time that this would require. One quick question, with the CLX modbus card, the card memory is accessible via the backplane? No block transfers? Yeah!

[rpraveenkum 5]

see link for prosoft modbus card for clx you have the sample with the RSL500 see vender sample applications http://www.prosoft-technology.com/content/view/full/621

[BobLfoot 301]

Yes I believe that the registers of the Modbus will show up a tags in CLX. You might have to use ProSofts UDT's {User Data Type} but you'll have tags you can program to without Block Xfer. I did not mention it might be possible to change the Remote IO { 1756-DHRIO / 1771-ASB setups} to ControlNet IO {1756-CNB / 1771-ACN15 } in which case all of your analog would also be tags in the CLX not block transfer. BIG CAUTION HERE - CHECK WITH ROCKWELL !! Some 1771 Analog Cards do not play nice with ControlNet. Consult AB for latest details. P.S. - You did see me say that this could be done one PLC 5 at a time right? And that reverting back is an option right up until the end. P.P.S - Once your "hybrid system" {CLGX CPU with 1771 I/O} is running and debugged you can swap one rack of 1771 I/O at a time to the newer 1756 CLGX IO. Let's you ge tthe program right without worrying about wiring being faulty and then change the wire without worry8ing about theprogram being faulty.

[BobLfoot 301]

Just checked the Knowledgebase and found the following: Answer ID - 17938 - The 1771-IX and 1771-IY Modules Will Not Work on the ControlNet Platform. Since we use the 1771-IX in some of our apps we've gone to CLGX DHRIO rather than CNET. We could try the alternative modules, but have an inventory of 1771-IX to burn thru first. Answer ID - 21609 - Block Transfers from ControlLogix to 1771-ACNR15. THis should snawer some of your questions about block transfers.

[Ken Moore 23]

Thanks Bob, I'll have to do a little reading, and perhaps make a recommendation to management.