{"schemaVersion":1,"slug":"station-local-control-ownership-interface","name":"Station local-control ownership interface","kind":"symbol","abbreviation":"SLOI","aliases":["Substation automation and command interfaces","substations Substation automation and command interfaces","substations","Substations","Local ownership selection","Selected control authority"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Shows when station-local operation has authority over the assigned remote supervisory path.","description":["Shows when station-local operation has authority over the assigned remote supervisory path. Station automation collects measurements and statuses and issues assigned commands through defined authority paths. A communicated point has a value, quality and equipment identity; it should not be treated as an unexplained contact.","In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Local ownership selection” at the input and “Selected control authority” at the output. Ownership and equipment availability are separate conditions.","Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Local ownership selection. Identify its source device or document and the state represented on the drawing.","Follow the named output: Selected control authority. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Ownership and equipment availability are separate conditions.","Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability."],"drawingChecklist":["Label the source and connection reference for local ownership selection.","Identify the destination and defined state of selected control authority.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Ownership and equipment availability are separate conditions."],"distinction":"Ownership and equipment availability are separate conditions. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Substations"},{"label":"Input / boundary","value":"Local ownership selection"},{"label":"Output / connection","value":"Selected control authority"},{"label":"Lookup label","value":"SLOI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-station-automation","relevance":"Public technical context for substation automation and command interfaces. Station I/O, alarms, event recording, command and communications interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["ga-substation-rtu","plc-digital-input","station-alarm-acknowledgement-return-path"],"artwork":"pi26-station-local-control-ownership-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"substations","family":"station-automation","input":"Local ownership selection","output":"Selected control authority"},"plainEnglish":{"title":"What this block does","introduction":"Shows when station-local operation has authority over the assigned remote supervisory path.","example":"In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Local ownership selection” at the input and “Selected control authority” at the output. Ownership and equipment availability are separate conditions.","drawings":"Start at the named input: Local ownership selection. Identify its source device or document and the state represented on the drawing. Follow the named output: Selected control authority. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Local ownership selection"},{"name":"Output","meaning":"Selected control authority"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Local ownership selection","SLOI","Selected control authority"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"SEL-2411 programmable automation controller","url":"https://selinc.com/products/2411/"}],"profileId":"power-installation-station-automation"},"url":"https://eloragrid.ai/symbols/station-local-control-ownership-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/station-local-control-ownership-interface.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-station-automation","publisher":"SEL","title":"SEL-2411 programmable automation controller","url":"https://selinc.com/products/2411/","scope":"Station I/O, alarms, event recording, command and communications interfaces.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for substation automation and command interfaces. Station I/O, alarms, event recording, command and communications interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}