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John Williams

RSLinx not recognizing PLC's

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I have a problem with the RSLinx on one of our computers not recognizing PLC's anymore, im trying to log a compact logix tag with RSview but RSLinx shows up the IP Address as a ? (or unrecognized device). I have a couple more PLC's already in and they show up right but now i get question marks when i try and add new ones. The new PLC is setup the same as the ones that are working also, any ideas what would be causing this? Edited by John Williams

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Does Linx put the red X on the unknown device or does it show it without the X when Linx is browsing?

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It shows a ? mark while its browsing, if i could add an attachment i could show you the screen shot, its a big yellow ?, it does however show a big red X for a few seconds then goes back to the ? Edited by John Williams

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The yellow question mark means that it sees the PLC but it doesn't recognise it, probably due to its being a newer revision than the RSLinx you have. Get with AB for an update, usually free and available online. It may also be just a need for a new EDS file relating to the PLC.

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Ok that worked guys, i had to install all five driver revisions but it works now, thanks alot

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