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Lookout communication with CompactLogix 5370 series via OPC won't work

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I am trying to communicate with a CompactLogix 5370 series 1769-L18ER-BB1B PLC. I have tried NI OPC Servers V4.5 and NI OPC Servers 2011 V5.5 with no luck. I can create a new channel and device ok using CompactLogix 5300. I can auto-create the tag database and it will pull all of the tags from the PLC ok. I am using Lookout version 6.6. When I create a new driver using OPC Client it will show all of the tags correctly.

 

As soon as I drag a tag onto a panel, Lookout alarms with:

Lookout NIOPC error.jpg

 

NI OPC shows these errors:

NIOPC Error.jpg

 

Any help would be greatly appreciated!!

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Accepted by topic author DavidinBlaine

I had upgraded the firmware in the CompactLogix to Rev 24 before starting.  OPC would work for about 25 seconds before stopping, but only after downloading a program into the PLC.  I downgraded the firmware to the oldest I could 20.014 and now everything works as it should. NI OPC isn't compatible with rev 24 yet???

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