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SEL-400 Series Relays Instruction Manual Date Code 20171006
IEC 61850 Communication
Potential Client and Automation Application Issues With Edition 2 Upgrades
ents or automation applications that rely on successful reselection might operate
incorrectly. You can resolve this by reconfiguring the client or automation appli-
cation.
Test Control Commands Fail Immediately
In Ed1, if the test attribute was set in a control command structure, the relay
would accept the command but perform no action on the target control object.
With enhanced control models, the IED would eventually report an operate time-
out error after the operate time-out expired. However, in Ed2, any such test com-
mands will fail immediately with an error indicating that the command is blocked
because the IED is not in the appropriate mode. Clients or automation applica-
tions that depend on the Ed1 behavior might fail. You can resolve this by recon-
figuring the client or automation application.
No Reports
Ed2 specifies that no reports are to be generated for a dead-banded attribute if the
dead band is set to 0. Previously in Ed1, a dead band of 0 would cause the relay to
generate reports for any change in the instantaneous value. Ed1-based clients or
automation applications might not operate correctly because of the lack of
reports. You can resolve this by reconfiguring the client or automation applica-
tion.
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