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What would cause a EPF2 fault using Profinet's telegram 1 and I/O profile on the ATV630 and ATV930 drives?

Issue:
What would cause a EPF2 fault using Profinet and I/O profile on the ATV630 and ATV930 drives?

Product Line:
ATV630

Environment:
All

Cause:
IO Profile and Telegram 1 are not compatible. 

Resolution:
Profinet telegram 1 is not supported with IO Profile.  It is suggested that they use telegram 100 which does support IO Profile.
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