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4.4.2 Cancel logic in SBO mode
In the SBO control mode the reception of the cancel command is possible when the cancel
conditions are satisfied. Accordingly, the function can discard the select command; finally, the
operation returns to the initial stage (i.e., “Wait for a command”.)
(i) Receiving “Cancel” from the remote-end
Figure 4.4-7 outlines the reception of the cancel command from the remote end.
Signal reception in
IEC61850
Command Reset from the
remote-end
Figure 4.4-7 Outline of cancel command from the remote-end
(ii) Input point required mapping
Figure 4.4-8 shows the cancel logic when a “Cancel command (Remote-Cancel)” signal enters
the OPTIM function. The input-point “OPTR01_CONTROL_REQ” is the same point of the
Figure 4.4-5.
OPTIM function (Function ID: 529001)
Unmatched condition
detected†
Figure 4.4-8 Cancel from the remote-end
†Note: The criteria “unmatched conditions” are determined when “Test-bit status” in a
command is not identical to “IED test status”.