# Restoration of grid connection use at start of supply — View MSB For a disconnected market location, the NB triggers the restoration of the grid connection use. The NB informs, where applicable, the MSB and, where applicable, the ÜNB about the result of the reconnection order. ## Process flow from the perspective of the MSB \nSystem diagram: Wiederherstellung der Anschlussnutzung bei Lieferbeginn — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB\n\nMarket partner\n\n\n\n1. Information über\nEntsperrauftrag\n\nNB\n\nAS4\n21040\n\nLoad data for the incoming\ncheck\n\n\nMarktlokation lesen\n\nAPI\n\nAPERAK check: Z10, Z17,\nZ18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n2. Ergebnis des\nEntsperrauftrags\n\n\nNB\n\nAS4\n21039\n\nLoad data for the incoming\ncheck\n\n\nMarktlokation lesen\n\nAPI\n\nAPERAK check: Z10, Z17,\nZ18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Wiederherstellung der Anschlussnutzung bei Lieferbeginn — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB\n\n\nNB\n\n\nÜNB\n\n\n1. Information über Entsperrauftrag\nAS4 · PI 21040\n\nCreate transaction\nCreate process data\n\n2. Ergebnis des Entsperrauftrags\nAS4 · PI 21039 · E_0487\nE_0487 — Prüfen, ob Entsperrauftrag erfolgreich\n\nCreate transaction\nCreate process data\n\n3. Ergebnis des Entsperrauftrags\nAS4 · PI 21039 · E_0487\nE_0487 — Prüfen, ob Entsperrauftrag erfolgreich\n"} titel="MSB" /> ## Process steps ### Information on the reconnection order
**Check identifiers** - [21040](/en/schnittstellen/202610/pruefi/IFTSTA/PI_21040) — Reconnection order info · AS4
**Flow**
  1. Message from **NB** · AS4
  2. **Load data for the incoming check** - [Read market location](/en/api/202610/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it
  3. **APERAK checks** - `21040` → `Z10` - `21040` → `Z17` - `21040` → `Z18`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202610/backend-schreiben-msb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Result of the reconnection order
**Check identifiers** - [21039](/en/schnittstellen/202610/pruefi/IFTSTA/PI_21039) — Order status (disconnect) · AS4
**Flow**
  1. Message from **NB** · AS4
    **Response per decision tree** - `21039` → [E_0487](/en/referenz/202610/ebd/E_0487) · NB · Check whether the reconnection order was successful
  2. **Load data for the incoming check** - [Read market location](/en/api/202610/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it
  3. **APERAK checks** - `21039` → `Z10` - `21039` → `Z17` - `21039` → `Z18`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202610/backend-schreiben-msb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Result of the reconnection order This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [21039](/en/schnittstellen/202610/pruefi/IFTSTA/PI_21039) — Order status (disconnect) · AS4
**Response per decision tree** - `21039` → [E_0487](/en/referenz/202610/ebd/E_0487) · NB · Check whether the reconnection order was successful
Decision trees of this process | EBD | Name | |---|---| | [E_0487](/referenz/202610/ebd/E_0487) | Check whether the reconnection order was successful |
## Process information Wording of the consolidated version, profile ch. 3.5.4.1, p. 114.
  1. ### Preconditions - In the case of the assignment of LFN to the market location within the use case “[Start of supply](/en/prozessdoku/202610/LF--LFA/GPKE-Teil2-lieferbeginn)”, NB determines that the registration relates to a disconnected market location. - The grid connection use is interrupted by means of the use case „[Interruption of the grid connection use (disconnect) on the instruction of the LF](/en/prozessdoku/202610/MSB/GPKE-Teil2-unterbrechung-der-anschlussnutzung-sperren-auf-anweisung-des-lf)“. It is therefore a consuming market location.
  2. ### Results The grid connection use via the affected market location is possible again.
  3. ### Error case #### Result in the error case - The grid connection use via the affected market location is still not possible. - The parties involved clarify the further procedure bilaterally. #### Error cases The grid connection use is not interrupted by means of the use case “[Interruption of the grid connection use (disconnect) at the instruction of the LF](/en/prozessdoku/202610/MSB/GPKE-Teil2-unterbrechung-der-anschlussnutzung-sperren-auf-anweisung-des-lf)”.
  4. ### Further requirements If the reconnection of the market location is carried out with the involvement of the MSB, these steps take place bilaterally outside this process standardisation.
  5. ### Trigger **Runs beforehand:** [Start of supply](/en/prozessdoku/202610/LF--LFA/GPKE-Teil2-lieferbeginn) — these processes name the one shown here in their result.
  6. ### First message **NB** sends “Information on the reconnection order” (step 1). From here on, it is the turn of the party involved on this page.
  7. ### Objective The grid connection use via the affected market location is possible again.
## 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 NB](/en/prozessdoku/202610/NB/GPKE-Teil2-wiederherstellung-der-anschlussnutzung-bei-lieferbeginn) — NB - [View ÜNB](/en/prozessdoku/202610/UENB/GPKE-Teil2-wiederherstellung-der-anschlussnutzung-bei-lieferbeginn) — ÜNB · market role UENB *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.* 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)