{"schemaVersion":1,"slug":"bay-command-termination-feedback","name":"Bay command-termination feedback","kind":"symbol","abbreviation":"BCF","aliases":["Substation automation and command interfaces","substations Substation automation and command interfaces","substations","Substations","Command execution result","Control transaction completion"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Reports the defined end state of the assigned control transaction.","description":["Reports the defined end state of the assigned control transaction. 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 “Command execution result” at the input and “Control transaction completion” at the output. A completed transaction may still require physical feedback.","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: Command execution result. Identify its source device or document and the state represented on the drawing.","Follow the named output: Control transaction completion. Cross-reference its destination and separate the command from confirmation that the equipment responded.","A completed transaction may still require physical feedback.","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 command execution result.","Identify the destination and defined state of control transaction completion.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: A completed transaction may still require physical feedback."],"distinction":"A completed transaction may still require physical feedback. 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":"Command execution result"},{"label":"Output / connection","value":"Control transaction completion"},{"label":"Lookup label","value":"BCF 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-telemetry-stale-data-flag"],"artwork":"pi26-bay-command-termination-feedback","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"substations","family":"station-automation","input":"Command execution result","output":"Control transaction completion"},"plainEnglish":{"title":"What this block does","introduction":"Reports the defined end state of the assigned control transaction.","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 “Command execution result” at the input and “Control transaction completion” at the output. A completed transaction may still require physical feedback.","drawings":"Start at the named input: Command execution result. Identify its source device or document and the state represented on the drawing. Follow the named output: Control transaction completion. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Command execution result"},{"name":"Output","meaning":"Control transaction completion"},{"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":["Command execution result","BCF","Control transaction completion"],"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/bay-command-termination-feedback","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/bay-command-termination-feedback.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."}]}