# Start of replacement supply / default supply — NB view The NB announces the assignment of the E/G to the market location to the E/G. ## Process flow from the perspective of the NB \nSystem diagram: Beginn der Ersatz-/Grundversorgung — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\nProcess trigger received\n\nSTART_EOG\n\nAPI\n\n1. Ankündigung der\nZuordnung des E/G zur\nMarktlokation\n\n\nLF (Notiz \"entspricht…\n\nAS4\n55013\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2. Antwort auf Ankündigung\nder Zuordnung des E/G zur\nMarktloka…\n\n\nLF (Notiz \"entspricht…\n\nAS4\n55014, 55015\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nProcess trigger received\n\n\nSTART_EOG\n\nAPI\n\n3. Zuordnung des E/G zur\nMarktlokation aufgrund\nfehlender Antw…\n\n\nLF (Notiz \"entspricht…\n\nAS4\n55013\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Beginn der Ersatz-/Grundversorgung — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nLF (Notiz \"entspricht E/G…\n\n\nSTART_EOG\nTrigger event\n\n1. Ankündigung der Zuordnung des E/G zur Marktlo…\nAS4 · PI 55013\n\nUpdate transaction\nUpdate process data\n\n2. Antwort auf Ankündigung der Zuordnung des E/G…\nAS4 · PI 55014, 55015 · E_0615\nE_0615 — Anmeldung E/G prüfen\n\nUpdate transaction\nUpdate process data\n\nSTART_EOG\nTrigger event\n\n3. Zuordnung des E/G zur Marktlokation aufgrund…\nAS4 · PI 55013\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Announcement of the assignment of the E/G to the market location
**Check identifiers** - [55013](/en/schnittstellen/202604/pruefi/UTILMD/PI_55013) — Registration / assignment EOG · AS4
**Flow**
  1. **Prozessauslöser** [`START_EOG`](/en/api/202604/ausloeser-nb/start-eog) \"\n }\n ],\n \"MARKTLOKATION\": [\n {\n \"marktgebiet\": \"\",\n \"marktlokationsId\": \"\",\n \"netzebene\": \"\",\n \"sperrstatus\": \"\",\n \"zaehlwerke\": [\n \"\"\n ]\n }\n ],\n \"MESSLOKATION\": [\n {\n \"messlokationsId\": \"\"\n }\n ],\n \"NETZNUTZUNGSVERTRAG\": [\n {\n \"gemeinderabatt\": null,\n \"vertragskonditionen\": {\n \"haushaltskunde\": \"\",\n \"naechstenetznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnungIntervall\": \"\",\n \"netznutzungsabrechnungsvariante\": \"\",\n \"netznutzungsvertrag\": \"\",\n \"netznutzungszahler\": \"\"\n }\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\",\n \"transaktionsgrund\": \"\",\n \"transaktionsgrundergaenzung\": \"\",\n \"transaktionsgrundergaenzungBefristeteAnmeldung\": \"\",\n \"vertragsbeginn\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_EOG\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **LF (note "corresponds to E/G")** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response to announcement of the assignment of the E/G to the market location
**Check identifiers** - [55014](/en/schnittstellen/202604/pruefi/UTILMD/PI_55014) — Confirmation EOG registration · AS4 - [55015](/en/schnittstellen/202604/pruefi/UTILMD/PI_55015) — Rejection EOG registration · AS4
**Flow**
  1. Message from **LF (note "corresponds to E/G")** · AS4
    **Response per decision tree** - `55014`, `55015` → [E_0615](/en/referenz/202604/ebd/E_0615) · LF · Check registration E/G
  2. **APERAK checks** - `55014`, `55015` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
### Assignment of the E/G to the market location due to a missing response
**Check identifiers** - [55013](/en/schnittstellen/202604/pruefi/UTILMD/PI_55013) — Registration / assignment EOG · AS4
**Flow**
  1. **Prozessauslöser** [`START_EOG`](/en/api/202604/ausloeser-nb/start-eog) \"\n }\n ],\n \"MARKTLOKATION\": [\n {\n \"marktgebiet\": \"\",\n \"marktlokationsId\": \"\",\n \"netzebene\": \"\",\n \"sperrstatus\": \"\",\n \"zaehlwerke\": [\n \"\"\n ]\n }\n ],\n \"MESSLOKATION\": [\n {\n \"messlokationsId\": \"\"\n }\n ],\n \"NETZNUTZUNGSVERTRAG\": [\n {\n \"gemeinderabatt\": null,\n \"vertragskonditionen\": {\n \"haushaltskunde\": \"\",\n \"naechstenetznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnungIntervall\": \"\",\n \"netznutzungsabrechnungsvariante\": \"\",\n \"netznutzungsvertrag\": \"\",\n \"netznutzungszahler\": \"\"\n }\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\",\n \"transaktionsgrund\": \"\",\n \"transaktionsgrundergaenzung\": \"\",\n \"transaktionsgrundergaenzungBefristeteAnmeldung\": \"\",\n \"vertragsbeginn\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_EOG\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **LF (note "corresponds to E/G")** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
Decision trees of this process | EBD | Name | |---|---| | [E_0615](/referenz/202604/ebd/E_0615) | Check registration E/G |
## Process information Wording of the consolidated version, profile ch. 2.3.2.1, pp. 33–34.
  1. ### Preconditions - This is a consuming market location. - A statutory substitute supply obligation exists for the market location or - there is a statutory basic supply obligation for the market location. - An allocation authorization according to the processes of MaBiS for the BK used by the E/G is available to NB.
  2. ### Results - The NB sends the calculation formula to the E/G. - The NB executes the use cases „[Billing data grid usage settlement](/en/prozessdoku/202604/NB/GPKE-Teil2-abrechnungsdaten-netznutzungsabrechnung)“ and „[Billing data balancing group settlement](/en/prozessdoku/202604/NB/GPKE-Teil2-abrechnungsdaten-bilanzkreisabrechnung)“. - The NB carries out the use case „Master data change“ (here: SD „[Master data change initiated by the NB (responsible)](/en/prozessdoku/202604/NB/GPKE-Teil4-stammdatenaenderung-vom-nb-verantwortlich-ausgehend)“) (GPKE part 4). - The NB executes the use case „[Set-up of the configurations due to an assignment of a LF to a market location or tranche](/en/prozessdoku/202604/NB/GPKE-Teil3-einrichtung-der-konfigurationen-aufgrund-einer-zuordnung-eines-lf-zu-einer-marktlokation-bzw-tranche)“ (GPKE part 3). - The LF carries out the use case „Master data change“ (here: SD „[Master data change initiated by the LF (responsible)](/en/prozessdoku/202604/NB/GPKE-Teil4-stammdatenaenderung-vom-lf-verantwortlich-ausgehend)“) (GPKE part 4).
  3. ### Error case #### Result in the error case The E/G has not been assigned to the market location: - The NB must ensure that the energy withdrawn from the market location is assigned to a BK, or - the NB has to carry out the interruption of grid connection use at the market location. • #### Error cases - This is a generating market location or a tranche.
  4. ### Further requirements - If NB has recorded an allocation end of a LF which is followed by an allocation start of a LF, where the allocation end and the allocation start are not congruent, the gap between the allocation end and the allocation start must be closed by a temporary assignment of the E/G to the market location. This may result, for example, from sending a „Request for the termination of the assignment of LFA to the market location or tranche“ within the use case „[Start of supply](/en/prozessdoku/202604/NB/GPKE-Teil2-lieferbeginn)“. - Note: The switch from substitute supply to basic supply takes place automatically after three months, provided the E/G is still assigned to the market location at that point in time. Whether the customer is in substitute supply or basic supply is not information relevant to a master data change, so the switch from substitute supply to basic supply does not result in a master data change from the E/G to NB. - Note: the E/G can terminate the basic supply relationship or the substitute supply relationship by means of the use case „[End of supply from LF to NB](/en/prozessdoku/202604/NB/GPKE-Teil2-lieferende-von-lf-an-nb)“. - This process applies accordingly to cases of contractually agreed replacement delivery or contractually agreed continuation of the substitute supply (subsequent substitute supply).
  5. ### Trigger - No LF is assigned to the market location. Reasons may in particular be: - Termination of the assignment of the LF to the market location due to - Deregistration of the assignment of the LF to the market location due to termination of the energy supply contract; without subsequent supply - Contract termination of the supplier framework contract - Information about the contract termination of the balancing group contract carried out by ÜNB - Expiry of the allocation authorization granted by BKV to LF - changed time series type and no valid allocation authorization for the new time series type - initial commissioning of a market location (creation) **Runs beforehand:** [Billing data for grid usage settlement](/en/prozessdoku/202604/NB/GPKE-Teil2-abrechnungsdaten-netznutzungsabrechnung), [Start of supply](/en/prozessdoku/202604/NB/GPKE-Teil2-lieferbeginn), [End of supply from LF to NB](/en/prozessdoku/202604/NB/GPKE-Teil2-lieferende-von-lf-an-nb), [End of supply from NB to LF](/en/prozessdoku/202604/NB/GPKE-Teil2-lieferende-von-nb-an-lf), [Creation](/en/prozessdoku/202604/NB/GPKE-Teil2-neuanlage) — these processes name the one shown here in their result.
  6. ### First message The party involved on this page sends this itself: “Announcement of the assignment of the E/G to the market location” to **LF (note "corresponds to E/G")** (step 1).
  7. ### Objective The LF (hereinafter referred to as E/G) is assigned to the market location.
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View LF](/en/prozessdoku/202604/LF/GPKE-Teil2-beginn-der-ersatz-grundversorgung) — LF *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.*