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Old October 19th, 2017, 07:43 PM   #2
Ken Roach
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What is the error code for the connection failure ?

There was a v20 bug with the 1769-L1 controllers where the POINTBus firmware could be incorrectly installed when you flashed over Ethernet, but it worked over USB. Knowledgebase Article 519117, but it was in 2012 so it might not be your issue.

This is almost certainly going to require some input from Rockwell Automation Tech Support.
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