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(iv) Receiving “Select command Off” from the local-end
Figure 4.1-7 outlines the reception of the select command ‘Off’ from the local-end.
Signal reception
from the front panel
Select command Off from front panel
Select command On from remote-end
Select command On from front panel
Select command On by the PLC
Select command Off by the PLC
Select command Off from remote-end
Figure 4.1-7 Outline of select command ‘Off’
Input signal generated at the local-end.
Figure 4.1-8 shows the select logic when a “Select command Off (Local-OFF-Control)” signal is
applied to the SPOS01 function. The signal is provided when the user presses a “OFF” key on
the IED front panel; the user is not required to map the signal from IEC61850 communication.
Command “Local-Off-Control”
SPOS01 function (Function ID: 510001)
ILK† condition (“Off”) passed
ILK† bypassing
(“Interlock Bypass”)
Either “SBO mode” or “DIR mode”
(e.g., “ctlmodel” in IEC61850*)
“Automatic sequence control function (AQEQ)§” in progress
“SPOS01_FSL_BO_CSF”
(510001_8601011DC6)
Select command
with ILK† condition
Operate command
with ILK† condition
Figure 4.1-8 Select ‘Off’ on the front panel in SPOS01
††
†Note: The software interlocking (ILK) function can provide the operation criteria for
“Off”. The ILK function is discussed separately; note that the operation criteria is
defined by the ILK function itself (i.e., the user cannot set the condition).