{"schemaVersion":1,"slug":"microgrid-frequency-match-adjustment-output","name":"Microgrid frequency-match adjustment output","kind":"symbol","abbreviation":"MFAO","aliases":["Microgrid synchronising interfaces","microgrids Microgrid synchronising interfaces","microgrids","Microgrids","Frequency matching demand","Source frequency adjustment"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Requests the assigned grid-forming source adjustment used to reduce the synchronising frequency error.","description":["Requests the assigned grid-forming source adjustment used to reduce the synchronising frequency error. Synchronising control compares two AC systems before their assigned connecting breaker closes. Voltage magnitude, frequency, phase relationship, breaker readiness and command authority are separate inputs to the closing decision.","In a microgrid reconnecting at its point of common coupling, a synchroniser can adjust the island reference while a separate permissive confirms the permitted relationship across the open breaker. For this reference, the drawing identifies “Frequency matching demand” at the input and “Source frequency adjustment” at the output. The receiving controller must support this interface.","Identify the two measurement sides and the equipment receiving any adjustment request. Closing limits, breaker timing and loss-of-measurement behavior require the approved synchronising design. 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: Frequency matching demand. Identify its source device or document and the state represented on the drawing.","Follow the named output: Source frequency adjustment. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The receiving controller must support this interface.","Identify the two measurement sides and the equipment receiving any adjustment request. Closing limits, breaker timing and loss-of-measurement behavior require the approved synchronising design."],"drawingChecklist":["Label the source and connection reference for frequency matching demand.","Identify the destination and defined state of source frequency adjustment.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The receiving controller must support this interface."],"distinction":"The receiving controller must support this interface. 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":"Microgrids"},{"label":"Input / boundary","value":"Frequency matching demand"},{"label":"Output / connection","value":"Source frequency adjustment"},{"label":"Lookup label","value":"MFAO is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-design","relevance":"Public technical context for microgrid synchronising interfaces. Microgrid power and control interfaces, synchronisation and source coordination. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["25-synchronism-check","synchronoscope","microgrid-voltage-match-adjustment-output"],"artwork":"pi26-microgrid-frequency-match-adjustment-output","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-sync","input":"Frequency matching demand","output":"Source frequency adjustment"},"plainEnglish":{"title":"What this block does","introduction":"Requests the assigned grid-forming source adjustment used to reduce the synchronising frequency error.","example":"In a microgrid reconnecting at its point of common coupling, a synchroniser can adjust the island reference while a separate permissive confirms the permitted relationship across the open breaker. For this reference, the drawing identifies “Frequency matching demand” at the input and “Source frequency adjustment” at the output. The receiving controller must support this interface.","drawings":"Start at the named input: Frequency matching demand. Identify its source device or document and the state represented on the drawing. Follow the named output: Source frequency adjustment. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Frequency matching demand"},{"name":"Output","meaning":"Source frequency adjustment"},{"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":["Frequency matching demand","MFAO","Source frequency adjustment"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Microgrid Flex components and control design","url":"https://productinfo.se.com/microgrid_guide/0100db2503_ecostruxure-microgrid-flex_design-guide_iec/English/0100DB2503-Microgrid%20Flex%20Design%20Guide-IEC-Optimize%20%28bookmap%29_DD00654397.XML.xml/%24/MicrogridFlexComponents-3A7DD96C"}],"profileId":"power-installation-microgrid-sync"},"url":"https://eloragrid.ai/symbols/microgrid-frequency-match-adjustment-output","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-frequency-match-adjustment-output.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-mg-design","publisher":"Schneider Electric","title":"Microgrid Flex components and control design","url":"https://productinfo.se.com/microgrid_guide/0100db2503_ecostruxure-microgrid-flex_design-guide_iec/English/0100DB2503-Microgrid%20Flex%20Design%20Guide-IEC-Optimize%20%28bookmap%29_DD00654397.XML.xml/%24/MicrogridFlexComponents-3A7DD96C","scope":"Microgrid power and control interfaces, synchronisation and source coordination.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid synchronising interfaces. Microgrid power and control interfaces, synchronisation and source coordination. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}