# Registration of a market location in model 2 by the NB (LPB) — NB view ## Process flow from the perspective of the NB \nSystem diagram: Anmeldung einer Marktlokation in das Modell 2 durch den NB (LPB) — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB (VNB)\n\nMarket partner\n\n\n\n1. Anmeldung in Modell 2\n\nNB (LPB)\n\nAS4\n55238\n\nAPERAK check: Z10, Z16,\nZ17, Z18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n2. Beendigung der\nZuordnung zur Marktlokation\n\n\nLF\n\nAS4\n55240\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n3. Antwort auf Beendigung\n\n\nLF\n\nAS4\n55241\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n4. Antwort auf Anmeldung\n\n\nNB (LPB)\n\nAS4\n55239\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Anmeldung einer Marktlokation in das Modell 2 durch den NB (LPB) — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB (VNB)\n\n\nNB (LPB)\n\n\nLF\n\n\n1. Anmeldung in Modell 2\nAS4 · PI 55238\n\nCreate transaction\nCreate process data\n\n2. Beendigung der Zuordnung zur Marktlokation\nAS4 · PI 55240\n\nUpdate transaction\nUpdate process data\n\n3. Antwort auf Beendigung\nAS4 · PI 55241 · E_0511\nE_0511 — Beendigung der Zuordnung prüfen\n\nUpdate transaction\nUpdate process data\n\n4. Antwort auf Anmeldung\nAS4 · PI 55239 · E_0510, E_0513\nE_0510 — Anmeldung prüfen\nE_0513 — Prüfen, ob Anmeldung direkt ablehnbar\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Registration in model 2
**Check identifiers** - [55238](/en/schnittstellen/202604/pruefi/UTILMD/PI_55238) — Registration in model 2 · AS4
**Flow**
  1. Message from **NB (LPB)** · AS4
  2. **APERAK checks** - `55238` → `Z10` - `55238` → `Z16` - `55238` → `Z17` - `55238` → `Z18`
  3. **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.
### Termination of the assignment to the market location
**Check identifiers** - [55240](/en/schnittstellen/202604/pruefi/UTILMD/PI_55240) — Termination of the assignment to the market location · AS4
**Flow**
  1. Message to **LF** · AS4
  2. **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 termination
**Check identifiers** - [55241](/en/schnittstellen/202604/pruefi/UTILMD/PI_55241) — Response to termination · AS4
**Flow**
  1. Message from **LF** · AS4
    **Response per decision tree** - `55241` → [E_0511](/en/referenz/202604/ebd/E_0511) · LF · Check termination of the assignment
  2. **APERAK checks** - `55241` → `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.
### Response to registration
**Check identifiers** - [55239](/en/schnittstellen/202604/pruefi/UTILMD/PI_55239) — Response to registration · AS4
**Flow**
  1. Message to **NB (LPB)** · AS4
    **Response per decision tree** - `55239` → [E_0513](/en/referenz/202604/ebd/E_0513) · NB · Check whether the registration can be rejected directly - `55239` → [E_0510](/en/referenz/202604/ebd/E_0510) · NB · Check registration
  2. **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_0510](/referenz/202604/ebd/E_0510) | Check registration | | [E_0511](/referenz/202604/ebd/E_0511) | Check termination of the assignment | | [E_0513](/referenz/202604/ebd/E_0513) | Check whether the registration can be rejected directly |
## Process information
  1. ### First message **NB (LPB)** sends “Registration in model 2” (step 1). From here on, it is the turn of the party involved on this page.
## 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 LPB](/en/prozessdoku/202604/NB--LPB/awh-modell-2-ladev-scharf-bila-energie-zuord-moglichkeit-anmeldung-einer-marktlokation-in-das-modell-2-durch-den-nb-lpb) — supply point operator · market role NB - [View LF](/en/prozessdoku/202604/LF/awh-modell-2-ladev-scharf-bila-energie-zuord-moglichkeit-anmeldung-einer-marktlokation-in-das-modell-2-durch-den-nb-lpb) — LF *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. ::: The connector table lists no write call for these steps. Derived from the process flow: the process begins for the own role with their message, so the transaction is created. Applies to: [1](#schritt-1) The connector table lists no write call for these steps. Derived from the process flow: the own role was already involved in this process, so the transaction already exists. Applies to: [3](#schritt-3) For the check identifiers of these steps there is no test case in the test data set; the »Try it out« button of the write interface therefore offers no body. Applies to: [1](#schritt-1), [2](#schritt-2), [3](#schritt-3), [4](#schritt-4)