# Request for and provision of meter readings — NB view ## Process flow from the perspective of the NB \nSystem diagram: Anforderung und Bereitstellung von Messwerten — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\nProcess trigger received\n\nSTART_ANFORDERUNG_MES\nSWERTE\n\nAPI\n\n1. Weitergabe\nEinzelanforderung\n(außerhalb der…\n\n\nMSB\n\nAS4\n17004\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2. Ablehnung\n\n\nMSB\n\nAS4\n19007\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n3. Messwertübermittlung\n\n\nMSB\n\nAS4\n13002, 13006, 13008…\n\nLoad data for the incoming\ncheck\n\n\n3 read APIs called\n\nAPI\nlisted at the step\n\nAPERAK check: MSCONS\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n4. Mitteilung über\ngescheiterte Auslesung\n\n\nMSB\n\nAS4\n21028\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nTriggered by incoming\nmessage: 17103\n\n\nProcess trigger received\n\n\nSTART_ERHEBUNG_MESSWE\nRTE\n\nAPI\n\n5. Übermittlung Ersatzwerte\n\n\nMSB\n\nAS4\n13002, 13006, 13008…\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nTriggered by incoming\nmessage: 17103\n\n\nProcess trigger received\n\n\nSTART_ERHEBUNG_MESSWE\nRTE\n\nAPI\n\n6. Messwertübermittlung\n\n\nLF\n\nAS4\n13002, 13006, 13008…\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Anforderung und Bereitstellung von Messwerten — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nMSB\n\n\nLF\n\n\nSTART_ANFORDERUNG_MESSWERTE\nTrigger event\n\n1. Weitergabe Einzelanforderung (außerhalb der T…\nAS4 · PI 17004\n\nUpdate transaction\nUpdate process data\n\n2. Ablehnung\nAS4 · PI 19007 · E_3009\nE_3009 — Anforderung prüfen\n\nCreate transaction\nCreate process data\n\n3. Messwertübermittlung\nAS4 · PI 13002, 13006, 13008…\n\nCreate transaction\nCreate process data\n\n4. Mitteilung über gescheiterte Auslesung\nAS4 · PI 21028\n\nCreate transaction\nCreate process data\n\nSTART_ERHEBUNG_MESSWERTE\nTrigger event\n\n5. Übermittlung Ersatzwerte\nAS4 · PI 13002, 13006, 13008…\n\nUpdate transaction\nUpdate process data\n\nSTART_ERHEBUNG_MESSWERTE\nTrigger event\n\n6. Messwertübermittlung\nAS4 · PI 13002, 13006, 13008…\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Forwarding of an individual request (outside the periodic meter reading)
**Check identifiers** - [17004](/en/schnittstellen/202604/pruefi/ORDERS/PI_17004) — Request for values · AS4
**Flow**
  1. **Prozessauslöser** [`START_ANFORDERUNG_MESSWERTE`](/en/api/202604/ausloeser-nb/start-anforderung-messwerte) \",\n \"gueltigAb\": \"\",\n \"lokationsId\": \"\"\n }\n ],\n \"AUFTRAG\": [\n {\n \"positionsdaten\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ANFORDERUNG_MESSWERTE\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **MSB** · 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.
### Rejection
**Check identifiers** - [19007](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19007) — Rejection of request for values · AS4
**Flow**
  1. Message from **MSB** · AS4
    **Response per decision tree** - `19007` → [E_3009](/en/referenz/202604/ebd/E_3009) · Check request
  2. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-nb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Meter reading transmission
**Check identifiers** - [13002](/en/schnittstellen/202604/pruefi/MSCONS/PI_13002) — Meter reading (gas) · AS4 - [13006](/en/schnittstellen/202604/pruefi/MSCONS/PI_13006) — Meter reading value cancellation · AS4 - [13008](/en/schnittstellen/202604/pruefi/MSCONS/PI_13008) — Load curve (gas) · AS4 - [13009](/en/schnittstellen/202604/pruefi/MSCONS/PI_13009) — Energy quantity (gas) · AS4
**Flow**
  1. Message from **MSB** · AS4
  2. **Load data for the incoming check** - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it - [Read meter](/en/api/202604/backend-lesen/getcounterbasic#zahler-lesen) `GET /getCounterBasic` Try it - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it
  3. **APERAK checks** - `13002`, `13006`, `13008`, `13009` → `MSCONS`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-nb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Notification of failed read-out
**Check identifiers** - [21028](/en/schnittstellen/202604/pruefi/IFTSTA/PI_21028) — Information notification · AS4
**Flow**
  1. Message from **MSB** · AS4
  2. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-nb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Transmission of substitute values
**Check identifiers** - [13002](/en/schnittstellen/202604/pruefi/MSCONS/PI_13002) — Meter reading (gas) · AS4 - [13006](/en/schnittstellen/202604/pruefi/MSCONS/PI_13006) — Meter reading value cancellation · AS4 - [13008](/en/schnittstellen/202604/pruefi/MSCONS/PI_13008) — Load curve (gas) · AS4 - [13009](/en/schnittstellen/202604/pruefi/MSCONS/PI_13009) — Energy quantity (gas) · AS4
**Flow**
  1. **Triggered by incoming message** - [17103](/schnittstellen/202604/pruefi/ORDERS/PI_17103) The MACO APP sends this message itself, as a follow-up process after this incoming message. In addition, the backend can trigger this step with an event — the next item.
  2. **Prozessauslöser** [`START_ERHEBUNG_MESSWERTE`](/en/api/202604/ausloeser-nb/start-erhebung-messwerte) \"\n ],\n \"lokationsId\": \"\"\n }\n ],\n \"ZAEHLER\": [\n {\n \"zaehlernummer\": \"\"\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"anfrageReferenz\": \"\",\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"lokationsTyp\": \"\",\n \"sparte\": \"\",\n \"typ\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ERHEBUNG_MESSWERTE\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  3. Message to **MSB** · AS4
  4. **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.
### Meter reading transmission
**Check identifiers** - [13002](/en/schnittstellen/202604/pruefi/MSCONS/PI_13002) — Meter reading (gas) · AS4 - [13006](/en/schnittstellen/202604/pruefi/MSCONS/PI_13006) — Meter reading value cancellation · AS4 - [13008](/en/schnittstellen/202604/pruefi/MSCONS/PI_13008) — Load curve (gas) · AS4 - [13009](/en/schnittstellen/202604/pruefi/MSCONS/PI_13009) — Energy quantity (gas) · AS4
**Flow**
  1. **Triggered by incoming message** - [17103](/schnittstellen/202604/pruefi/ORDERS/PI_17103) The MACO APP sends this message itself, as a follow-up process after this incoming message. In addition, the backend can trigger this step with an event — the next item.
  2. **Prozessauslöser** [`START_ERHEBUNG_MESSWERTE`](/en/api/202604/ausloeser-nb/start-erhebung-messwerte) \"\n ],\n \"lokationsId\": \"\"\n }\n ],\n \"ZAEHLER\": [\n {\n \"zaehlernummer\": \"\"\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"anfrageReferenz\": \"\",\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"lokationsTyp\": \"\",\n \"sparte\": \"\",\n \"typ\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ERHEBUNG_MESSWERTE\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  3. Message to **LF** · AS4
  4. **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_3009](/referenz/202604/ebd/E_3009) | Check request |
## Process information
  1. ### First message The party involved on this page is itself the sender of: „Forwarding of an individual request (outside the periodic meter reading)“ to **MSB** (step 1).
## 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/geli-gas-2-0-anforderung-und-bereitstellung-von-messwerten) — LF - [View MSB](/en/prozessdoku/202604/MSB/geli-gas-2-0-anforderung-und-bereitstellung-von-messwerten) — MSB *The source provides no use case profile for this process — objective, precondition and result are not recorded there.* *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.* :::caution{title="Step sequence reconstructed"} For this process, the BNetzA consolidated version carries no sequence diagram. The steps are reconstructed from the BDEW check identifier table: grouped by the designation, ordered by the process step. The method agrees with the consolidated version in 200 of 200 cases that can be cross-checked — the individual line is nevertheless not editorially reviewed. Check it against the rulebook before adopting it into an implementation specification. :::