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Cancel logic for SBO mode
4.2.2
In the SBO control mode the reception of a 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".)
Receiving "Cancel" from the remote-end
(i)
Figure 4.2-14 depicts the cancel command procedure for a cancel command initiated from the
remote-end.
Wait for a command
Select logics
Select command On from the remote-end
Select command Off from the remote-end
Select command On from the local-end
Select command Off from the local-end
Select command On by the PLC function
Select command Off by the PLC function
Figure 4.2-14 Outline of 'cancel' command from the remote-end
Input point required mapping
Figure 4.2-15 depicts the cancel logic when a "Cancel command (Remote-Cancel)" signal is
applied to the DPOS01 function. The input-point "DEV01_CONTROL_REQ" is the same as
that for the signal "Select command On (Remote-ON-Control)".
Output signal to BO
The DPOS01 function can issue a "Success to cancel" signal at the monitoring point
"DPOS01_CC_SS", when the DPOS01 function has determined that the signal "Remote-cancel"
is true. Another signal "Operation failed" is issued at monitoring point "DPOS01_CC_FS" if
the DPOS01 function is able to determine that the signal "Remote-cancel" is not true.
Wait for a next command
Cancel from the remote-end
Signal reception in
Cancel logic
IEC61850
Cancel from the local-end
Operate logic
Operate command
Operate logic
- 506 -
6F2T0207 (0.01)
Success
Cancel
Do nothing
decision
Failed
GRE200 (5,6)
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