# Microgrid mode-change rejection indication Canonical URL: https://eloragrid.ai/symbols/microgrid-mode-change-rejection-indication Publisher: Elora Grid Updated: 2026-11-03 Lookup label: MMRI Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: microgrids Input: Mode request and failed prerequisites Output: Mode-change rejection Reports that a requested operating-mode change failed its defined entry conditions. ## In plain English ### What this block does Reports that a requested operating-mode change failed its defined entry conditions. ### 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 “Mode request and failed prerequisites” at the input and “Mode-change rejection” at the output. The rejected condition should remain identifiable. ### What the drawings help you do Start at the named input: Mode request and failed prerequisites. Identify its source device or document and the state represented on the drawing. Follow the named output: Mode-change rejection. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Mode request and failed prerequisites - Output: Mode-change rejection - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Mode request and failed prerequisites → MMRI → Mode-change rejection 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 Reports that a requested operating-mode change failed its defined entry conditions. 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 “Mode request and failed prerequisites” at the input and “Mode-change rejection” at the output. The rejected condition should remain identifiable. 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: Mode request and failed prerequisites. Identify its source device or document and the state represented on the drawing. - Follow the named output: Mode-change rejection. Cross-reference its destination and separate the command from confirmation that the equipment responded. - The rejected condition should remain identifiable. - 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 mode request and failed prerequisites. - Identify the destination and defined state of mode-change rejection. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: The rejected condition should remain identifiable. ## Important distinction The rejected condition should remain identifiable. 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: Mode request and failed prerequisites - Output / connection: Mode-change rejection - Lookup label: MMRI 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.