# Request for a value from the LF — MSB-MELO view By means of an order process, the NB or LF requests interim meter readings from the MSB of the market location that was assigned to the market location for the time period for which the values are required. The MSB of the market location checks the request and fulfils it or, where applicable, rejects it. By means of an order process, the MSB of the market location requests interim meter readings of the metering location from the MSB of the metering location that was assigned to the metering location for the time period for which the values are required. The MSB of the metering location checks the request and fulfils it or, where applicable, rejects it. ## Process flow from the perspective of the MSB (MSB-MELO) \nSystem diagram: Anforderung Wert vom LF — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB (entsprich…\n\nMarket partner\n\n\n\n4. Anforderung Wert einer\nMesslokation\n\nMSB (entspricht MSB a…\n\nAS4\n17004\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nEBD check: S_0074\nAnforderung von Werten\nprüfen (Strom)\n\n\nTrigger follow-up process:\n19007, ANFRAGE_WERTE\n\n\nTriggered by incoming\nmessage: 17004\n\n\n5. Bearbeitungsstand bei\nBeendigung des Prozesses\n\n\nMSB (entspricht MSB a…\n\nAS4\n19007\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Anforderung Wert vom LF — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB (entsprich…\n\n\nLF\n\n\nMSB (entspricht MSB am Ob…\n\n\n1. Anforderung Wert\nAS4 · PI 17004\n\n2. Bearbeitungsstand bei Beendigung des Prozesses\nAS4 · PI 19007 · E_0221\nE_0221 — Anforderung Wert prüfen\n\n4. Anforderung Wert einer Messlokation\nAS4 · PI 17004\n\nCreate transaction\nCreate process data\n\n5. Bearbeitungsstand bei Beendigung des Prozesses\nAS4 · PI 19007 · E_0222\nE_0222 — Anforderung Wert prüfen\n\nUpdate transaction\nUpdate process data\n\n6. Bearbeitungsstand bei Beendigung des Prozesses\nAS4 · PI 19007\n"} titel="MSB-MELO" /> ## Process steps ### Request value This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [17004](/en/schnittstellen/202604/pruefi/ORDERS/PI_17004) — Request for values · AS4
### Processing status at termination of the process This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [19007](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19007) — Rejection of request for values · AS4
**Response per decision tree** - `19007` → [E_0221](/en/referenz/202604/ebd/E_0221) · Check request for value
### Request for value of a metering location
**Check identifiers** - [17004](/en/schnittstellen/202604/pruefi/ORDERS/PI_17004) — Request for values · AS4
**Flow**
  1. Message from **MSB (corresponds to MSB at the market location object)** · AS4
  2. **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.
  3. **Decision tree** - `17004` → `S_0074` — Check request for values (Electricity)
  4. **Trigger follow-up process** - [19007](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19007) — Rejection of request for values - `ANFRAGE_WERTE` After processing, the MACO APP starts the follow-up process itself; which of them runs depends on the result of the processing.
### Processing status at termination of the process
**Check identifiers** - [19007](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19007) — Rejection of request for values · AS4
**Flow**
  1. **Triggered by incoming message** - [17004](/en/schnittstellen/202604/pruefi/ORDERS/PI_17004) — Request for values The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. Message to **MSB (corresponds to MSB at the market location object)** · AS4
    **Response per decision tree** - `19007` → [E_0222](/en/referenz/202604/ebd/E_0222) · Check request for value
  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 once the message has been created.
### Processing status at termination of the process This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [19007](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19007) — Rejection of request for values · AS4
Decision trees of this process | EBD | Name | |---|---| | [E_0222](/referenz/202604/ebd/E_0222) | Check request for value | | [E_0221](/referenz/202604/ebd/E_0221) | Check request for value |
## Process information Wording of the consolidated version, profile ch. 2.6.1, p. 38.
  1. ### Preconditions - The MSB knows the metering locations and market location. - The requesting party is authorised to request and receive interim reading values.
  2. ### Results Transmission of the interim meter readings to the authorised parties.
  3. ### Further requirements If the MSB changes before the order date in the case of an order placement directed into the future, the order placement sent becomes obsolete. The order placement must be sent again to the MSB then responsible.
  4. ### Trigger The trigger for an order placement from NB or LF to the MSB of the market location can be an interim meter reading (see no. 4 in the table „Representation of the values to be transmitted“) for market locations whose metering locations are equipped with kME with active energy metering, mME or iMS. The trigger for an order placement from NB to the MSB of the market location can be a delimitation procedure for metered market locations whose metering locations are equipped with kME with active energy metering or mME (see the requirements of chapter 2.2.2. „Processing and transmission of values“ on the subject of delimitation).
  5. ### First message **MSB (corresponds to MSB at the market location object)** sends “Request for value of a metering location” (step 4). From this point on, the party on this page is next to act.
  6. ### Objective The NB or LF has requested interim meter readings from the MSB of the market location, or the MSB of the market location has requested interim meter readings from the MSB of the metering location.
## 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 MSB-MALO](/en/prozessdoku/202604/MSB--MSB-MALO/WiM-Teil2-anforderung-wert-vom-lf) — MSB at the market location object · market role MSB - [View LF](/en/prozessdoku/202604/LF/WiM-Teil2-anforderung-wert-vom-lf) — LF *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.*