# Device takeover — MSBA view The MSBN of the metering location requests a device takeover quotation from the MSBA of the metering location. The MSBA of the metering location transmits, free of charge, a quotation for the purchase or use of the technical equipment of the individual metering location requested by the MSBN of the metering location, for the takeover date desired by the MSBN of the metering location. The components of the measuring equipment can be offered individually or in full. The MSBN of the metering location accepts the overall quotation or quotations for individual technical equipment as part of an order placement. Acceptance with regard to individual technical equipment at the same time constitutes implied rejection with regard to the remaining technical equipment offered by the MSBA of the metering location. The MSBA of the metering location confirms the ordered device takeover. If the measuring equipment itself is affected by the device takeover, the MSBA of the metering location transmits the meter reading for the device takeover to the MSBN of the metering location in the case of a kME or mME with active energy metering. ## Process flow from the perspective of the MSB (MSBA) \nSystem diagram: Geräteübernahme — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB (entsprich…\n\nMarket partner\n\n\n\n1. Anforderung\nGeräteübernahme-angebot\n\nMSB (entspricht MSBN…\n\nAS4\n35001\n\nLoad data for the incoming\ncheck\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\nAPERAK check: Z10, Z18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nLoad data for the check\n\n\nMesslokation lesen\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\nProcess trigger received\n\n\nSTART_ANGEBOT_GERAETE\nUEBERNAHME\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\n2.\nGeräteübernahme-angebot\n\n\nMSB (entspricht MSBN…\n\nAS4\n15001\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n3. Bestellung\n\n\nMSB (entspricht MSBN…\n\nAS4\n17001\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nLoad data for the check\n\n\nLESEN_ANGEBOT_BASIS\n\nAPI\n\nEBD check: E_0247\nBestellung prüfen\n\n\nTrigger follow-up process:\n19001, 19002\n\n\nTriggered by incoming\nmessage: 17001\n\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\n4. Bestellbestätigung\n\n\nMSB (entspricht MSBN…\n\nAS4\n19001, 19002\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nProcess trigger received\n\n\nSTART_ERHEBUNG_MESSWE\nRTE\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\n5. Zählerstand zur\nGeräteübernahme\n\n\nMSB (entspricht MSBN…\n\nAS4\n13017\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Geräteübernahme — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB (entsprich…\n\n\nMSB (entspricht MSBN am O…\n\n\n1. Anforderung Geräteübernahme-angebot\nAS4 · PI 35001\n\nCreate transaction\nCreate process data\n\nUpdate transaction\nUpdate process data\n\nSTART_ANGEBOT_GERAETEUEBERNAHME\nTrigger event\n\n2. Geräteübernahme-angebot\nAS4 · PI 15001\n\nUpdate transaction\nUpdate process data\n\n3. Bestellung\nAS4 · PI 17001\n\nUpdate transaction\nUpdate process data\n\n4. Bestellbestätigung\nAS4 · PI 19001, 19002 · E_0247\nE_0247 — Bestellung prüfen\n\nUpdate transaction\nUpdate process data\n\nSTART_ERHEBUNG_MESSWERTE\nTrigger event\n\n5. Zählerstand zur Geräteübernahme\nAS4 · PI 13017\n\nUpdate transaction\nUpdate process data\n"} titel="MSBA" /> ## Process steps ### Request device takeover quotation
**Check identifiers** - [35001](/en/schnittstellen/202604/pruefi/REQOTE/PI_35001) — Request for device takeover quotation · AS4
**Flow**
  1. Message from **MSB (corresponds to MSBN at the metering location object)** · AS4
  2. **Load data for the incoming check** - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  3. **APERAK checks** - `35001` → `Z10` - `35001` → `Z18`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/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.
  5. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/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.
  6. **Load data for the check** - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  7. **Load data for processing** - `LESEN_ANFRAGE_BASIS` - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
### Device takeover quotation
**Check identifiers** - [15001](/en/schnittstellen/202604/pruefi/QUOTES/PI_15001) — Quotation device takeover · AS4
**Flow**
  1. **Prozessauslöser** [`START_ANGEBOT_GERAETEUEBERNAHME`](/en/api/202604/ausloeser-msb/start-angebot-geraeteuebernahme) \"\n }\n ],\n \"ANGEBOT\": [\n {\n \"anfragereferenz\": \"\",\n \"angebotsdatum\": \"\",\n \"positionsdaten\": [\n \"\"\n ]\n }\n ],\n \"MESSLOKATION\": [\n {\n \"messlokationsId\": \"\"\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ANGEBOT_GERAETEUEBERNAHME\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. **Load data for processing** - [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
  3. Message to **MSB (corresponds to MSBN at the metering location object)** · AS4
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/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** - [17001](/en/schnittstellen/202604/pruefi/ORDERS/PI_17001) — Order placement device takeover quotation · AS4
**Flow**
  1. Message from **MSB (corresponds to MSBN at the metering location object)** · AS4
  2. **APERAK checks** - `17001` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/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.
  4. **Load data for the check** - `LESEN_ANGEBOT_BASIS`
  5. **Decision tree** - `17001` → [E_0247](/en/referenz/202604/ebd/E_0247) — Check order placement
  6. **Trigger follow-up process** - [19001](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19001) — Confirmation of order placement - [19002](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19002) — Rejection of order placement After processing, the MACO APP starts the follow-up process itself; which of them runs depends on the result of the processing.
### Order confirmation
**Check identifiers** - [19001](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19001) — Confirmation of order placement · AS4 - [19002](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19002) — Rejection of order placement · AS4
**Flow**
  1. **Triggered by incoming message** - [17001](/en/schnittstellen/202604/pruefi/ORDERS/PI_17001) — Order placement device takeover quotation The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. **Load data for processing** - `LESEN_ANFRAGE_BASIS` - `LESEN_AUFTRAG_BASIS`
  3. Message to **MSB (corresponds to MSBN at the metering location object)** · AS4
    **Response per decision tree** - `19001`, `19002` → [E_0247](/en/referenz/202604/ebd/E_0247) · Check order placement
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Meter reading for the device takeover
**Check identifiers** - [13017](/en/schnittstellen/202604/pruefi/MSCONS/PI_13017) — Meter reading (electricity) · AS4
**Flow**
  1. **Prozessauslöser** [`START_ERHEBUNG_MESSWERTE`](/en/api/202604/ausloeser-msb/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.
  2. **Load data for processing** - `LESEN_ENERGIEMENGE_ZAEHLERSTAND_BASIS` - [Read meter](/en/api/202604/backend-lesen/getcounterbasic#zahler-lesen) `GET /getCounterBasic` Try it
  3. Message to **MSB (corresponds to MSBN at the metering location object)** · AS4
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/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_0247](/referenz/202604/ebd/E_0247) | Check order placement |
## Process information Wording of the consolidated version, profile ch. 3.2.1, pp. 48–49.
  1. ### Preconditions As a result of a MSB change (use case „[Start of metering point operation](/en/prozessdoku/202604/MSB--MSBA/WiM-Teil1-beginn-messstellenbetrieb)“ or use case „[Commitment gMSB](/en/prozessdoku/202604/MSB--MSBA/WiM-Teil1-verpflichtung-gmsb)“), the MSBN of the metering location or gMSB (represented in this use case as MSBN) of the metering location intends a device takeover.
  2. ### Results If the measuring equipment itself is affected by the device takeover, the MSBA of the metering location and MSBN of the metering location carry out the SD „[Processing and transmission of values from the MSB of the metering location](/en/prozessdoku/202604/MSB--MSB-MALO/WiM-Teil2-aufbereitung-und-uebermittlung-von-werten-vom-msb-der-messlokation)“ (WiM part 2).
  3. ### Further requirements Note: If the measuring equipment itself is affected by the device takeover, the MSB of the market location transmits values to the NB, LF and ÜNB (WiM part 2, chapter 2.4.3. „[SD: Processing and transmission of values from the MSB of the market location](/en/prozessdoku/202604/LF/WiM-Teil2-aufbereitung-und-uebermittlung-von-werten-vom-msb-der-marktlokation)“). If a market location has several metering locations and not all metering locations are affected by the device replacement and/or a device takeover, the MSB of the market location must, in order to determine the energy quantity of the market location, collect values for the metering locations not affected by the device replacement/device takeover and, where necessary, request them from the MSB of the metering location.
  4. ### First message **MSB (corresponds to MSBN on the metering location object)** sends “Request for device takeover quotation” (step 1). From here on, the party involved on this side is the one to act.
  5. ### Objective The interactions for preparing and performing a device takeover between the MSBN of the metering location and the MSBA of the metering location have been completed.
## 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 MSBN](/en/prozessdoku/202604/MSB--MSBN/WiM-Teil1-geraeteuebernahme) — the receiving MSB · market role MSB *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.* These read accesses are not listed in the API catalogue of this format version; the step therefore shows only their command, without address and without button. Applies to: [1](#schritt-1), [3](#schritt-3), [4](#schritt-4), [5](#schritt-5)