# Microgrid emergency operating-state interface Canonical URL: https://eloragrid.ai/symbols/microgrid-emergency-operating-state-interface Publisher: Elora Grid Updated: 2026-11-03 Lookup label: MEOI Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: microgrids Input: Emergency-system request Output: Assigned emergency control state Coordinates the separately defined emergency control state and its assigned resource outputs. ## In plain English ### What this block does Coordinates the separately defined emergency control state and its assigned resource outputs. ### A simple example In a microgrid serving a switchroom and industrial loads, the controller can move between grid-connected and islanded operating states only through its defined transition logic. Each state needs identifiable source roles and feedback. For this reference, the drawing identifies “Emergency-system request” at the input and “Assigned emergency control state” at the output. The emergency cause-and-effect design governs its scope. ### What the drawings help you do Start at the named input: Emergency-system request. Identify its source device or document and the state represented on the drawing. Follow the named output: Assigned emergency control state. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Emergency-system request - Output: Assigned emergency control state - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Emergency-system request → MEOI → Assigned emergency control state A reading guide. The entry's original illustration and input/output facts describe this application. - [Microgrid operating modes and transitions management](https://productinfo.se.com/emol_functional_specifications/doca0371_emol_functionalspecifications/EN/DOCA0371_EMOL_Functional_Specifications_DD00894746.xml/%24/EMOL_OperatingModesandTransitionsManagement_DD00895904) ## What it represents Coordinates the separately defined emergency control state and its assigned resource outputs. A microgrid operating-mode function coordinates how local sources and loads relate to the utility connection. The selected mode, the measured electrical condition and the actual switching configuration can differ during a transition. In a microgrid serving a switchroom and industrial loads, the controller can move between grid-connected and islanded operating states only through its defined transition logic. Each state needs identifiable source roles and feedback. For this reference, the drawing identifies “Emergency-system request” at the input and “Assigned emergency control state” at the output. The emergency cause-and-effect design governs its scope. Show the requested mode, entry conditions, completion feedback and failure indication. These functional blocks explain control responsibilities and do not specify a ready-to-use operating sequence or grid-connection approval. 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. ## How to read it - Start at the named input: Emergency-system request. Identify its source device or document and the state represented on the drawing. - Follow the named output: Assigned emergency control state. Cross-reference its destination and separate the command from confirmation that the equipment responded. - The emergency cause-and-effect design governs its scope. - Show the requested mode, entry conditions, completion feedback and failure indication. These functional blocks explain control responsibilities and do not specify a ready-to-use operating sequence or grid-connection approval. ## Information to show or reference - Label the source and connection reference for emergency-system request. - Identify the destination and defined state of assigned emergency control state. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: The emergency cause-and-effect design governs its scope. ## Important distinction The emergency cause-and-effect design governs its scope. 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 - Representation: Functional block - Installation focus: Microgrids - Input / boundary: Emergency-system request - Output / connection: Assigned emergency control state - Lookup label: MEOI is a library lookup label, not a standard device designation. ## Public references - [Microgrid operating modes and transitions management](https://productinfo.se.com/emol_functional_specifications/doca0371_emol_functionalspecifications/EN/DOCA0371_EMOL_Functional_Specifications_DD00894746.xml/%24/EMOL_OperatingModesandTransitionsManagement_DD00895904) — Schneider Electric. Public technical context for microgrid operating-mode controls. Grid-connected and island modes, transitions, topology and authority. The application text and educational graphic are independently authored; the publisher does not certify this representation. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.