# Exchange of the delta time series carry-over list from ÜNB to NB — ÜNB view The NB receives the DZÜ list from the ÜNB. ## Process flow from the perspective of the ÜNB \nSystem diagram: Austausch der Deltazeitreihenübertrag-Liste von ÜNB an NB — view of ÜNB\n\n\nCustomer backend system\n\nMACO APP · ÜNB\n\nMarket partner\n\n\n\n1. Übermittlung der\nDZÜ-Liste\n\nNB\n\nAS4\n55223\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Austausch der Deltazeitreihenübertrag-Liste von ÜNB an NB — view of ÜNB\n\n\nBackend (customer)\n\n\nMACO APP · ÜNB\n\n\nNB\n\n\n1. Übermittlung der DZÜ-Liste\nAS4 · PI 55223\n\nUpdate transaction\nUpdate process data\n"} titel="ÜNB" /> ## Process steps ### Transmission of the DZÜ list
**Check identifiers** - [55223](/en/schnittstellen/202610/pruefi/UTILMD/PI_55223) — DZÜ list · AS4
**Flow**
  1. Message to **NB** · AS4
  2. **Write endpoint** - Transaction updated — `AKTUALISIEREN_PROZESSDATEN` Updates the existing transaction in the backend once the message has been created.
## Process information Wording of the consolidated version, profile ch. 12.4.1, p. 170.
  1. ### Preconditions - The ÜNB has determined a DZÜ. - The NB knows the MaBiS-ZP of the DZÜ.
  2. ### Results - The NB can check the plausibility of the DZÜ list on the basis of its data.
  3. ### First message The party involved on this page is itself the sender of: „Transmission of the DZÜ list“ to **NB** (step 1).
  4. ### Objective The NB has the DZÜ list from the ÜNB.
## 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/MaBiS-austausch-der-deltazeitreihenuebertrag-liste-von-uenb-an-nb) — NB *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 source does not yet name the event that triggers these steps. Applies to: [1](#schritt-1) For this market role there is no write catalog; the step therefore shows only the command of the write call, without address and without button. Applies to: [1](#schritt-1)