03-17-2015 07:29 AM
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:
NI OPC shows these errors:
Any help would be greatly appreciated!!
Solved! Go to Solution.
03-20-2015 10:46 AM
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???