# Metering location change from LF to MSB — MSB-MELO view ## Process flow from the perspective of the MSB (MSB-MELO) \nSystem diagram: Messlokationsänderung vom LF an MSB — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB (entsprich…\n\nMarket partner\n\n\n\n1. Anfrage eines Angebots\nzur Messlokationsänderung\n\nLF\n\nAS4\n35005\n\nAPERAK check: Z10, Z17,\nZ18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nTriggered by incoming\nmessage: 35004\n\n\n2. Angebot oder Ablehnung\nder Anfrage\n\n\nLF\n\nAS4\n15005, 21033\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n3. Bestellung\n\n\nLF\n\nAS4\n17011\n\nAPERAK check: Z33, Z10,\nZ17, Z18\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n4. Antwort auf Bestellung\n\n\nLF\n\nAS4\n19005, 19006\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n6. Scheitern der Änderung\n\n\nLF\n\nAS4\n21025\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Messlokationsänderung vom LF an MSB — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB (entsprich…\n\n\nLF\n\n\n1. Anfrage eines Angebots zur Messlokationsänder…\nAS4 · PI 35005\n\nCreate transaction\nCreate process data\n\n2. Angebot oder Ablehnung der Anfrage\nAS4 · PI 15005, 21033 · E_0281\nE_0281 — Anfrage prüfen\n\nUpdate transaction\nUpdate process data\n\n3. Bestellung\nAS4 · PI 17011\n\nUpdate transaction\nUpdate process data\n\n4. Antwort auf Bestellung\nAS4 · PI 19005, 19006 · E_0283\nE_0283 — Bestellung prüfen\n\nUpdate transaction\nUpdate process data\n\n6. Scheitern der Änderung\nAS4 · PI 21025 · E_0286\nE_0286 — Messlokationsänderung durchführen\n\nUpdate transaction\nUpdate process data\n"} titel="MSB-MELO" /> ## Process steps ### Request for a quotation for the metering location change
**Check identifiers** - [35005](/en/schnittstellen/202610/pruefi/REQOTE/PI_35005) — Request for quotation for technical change · AS4
**Flow**
  1. Message from **LF** · AS4
  2. **APERAK checks** - `35005` → `Z10` - `35005` → `Z17` - `35005` → `Z18`
  3. **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.
### Quotation or rejection of the request
**Check identifiers** - [15005](/en/schnittstellen/202610/pruefi/QUOTES/PI_15005) — Quotation change of technology · AS4 - [21033](/en/schnittstellen/202610/pruefi/IFTSTA/PI_21033) — Rejection of the request · AS4
**Flow**
  1. **Triggered by incoming message** - [35004](/schnittstellen/202610/pruefi/REQOTE/PI_35004) The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. Message to **LF** · AS4
    **Response per decision tree** - `21033` → [E_0281](/en/referenz/202610/ebd/E_0281) · MSB · Check request
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Order placement
**Check identifiers** - [17011](/en/schnittstellen/202610/pruefi/ORDERS/PI_17011) — Order placement quotation change of technology · AS4
**Flow**
  1. Message from **LF** · AS4
  2. **APERAK checks** - `17011` → `Z33` - `17011` → `Z10` - `17011` → `Z17` - `17011` → `Z18`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
### Response to order placement
**Check identifiers** - [19005](/en/schnittstellen/202610/pruefi/ORDRSP/PI_19005) — Confirmation of order change of technology · AS4 - [19006](/en/schnittstellen/202610/pruefi/ORDRSP/PI_19006) — Rejection of order change of technology · AS4
**Flow**
  1. Message to **LF** · AS4
    **Response per decision tree** - `19005`, `19006` → [E_0283](/en/referenz/202610/ebd/E_0283) · MSB · Check order placement
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Failure of the change
**Check identifiers** - [21025](/en/schnittstellen/202610/pruefi/IFTSTA/PI_21025) — Status message · AS4
**Flow**
  1. Message to **LF** · AS4
    **Response per decision tree** - `21025` → [E_0286](/en/referenz/202610/ebd/E_0286) · MSB · Carry out metering location change
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-msb/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_0281](/referenz/202610/ebd/E_0281) | Check request | | [E_0283](/referenz/202610/ebd/E_0283) | Check order placement | | [E_0286](/referenz/202610/ebd/E_0286) | Carry out metering location change |
## Process information
  1. ### First message **LF** sends “Request for an offer for a metering location change” (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 LF](/en/prozessdoku/202610/LF/awh-prozesse-zur-anderung-der-technik-an-lokationen-messlokationsanderung-vom-lf-an-msb) — 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. The numbers are those of the source; where one is missing, it is missing there.* :::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), [3](#schritt-3), [6](#schritt-6)