# Order cancellation of the aggregation level of the balancing group aggregated time series at control area level — ÜNB view The BKV cancels the order for the BK-SZR (category B) at RZ level with the ÜNB for the specified BK as of the first of a month. The ÜNB is informed that the aggregation level RZ is no longer agreed for this BK from that point in time and that the BKV therefore requires the BK-SZR (category B) only at BG level for this BK from that point in time. ## Process flow from the perspective of the ÜNB \nSystem diagram: Abbestellung der Aggregationsebene der Bilanzkreissummenzeitreihe auf Ebene der Regelzone — view of ÜNB\n\n\nCustomer backend system\n\nMACO APP · ÜNB\n\nMarket partner\n\n\n\n1. Abbestellung der\nAggregationsebene RZ\n\nBKV\n\nAS4\n17207\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n2. Antwort\n\n\nBKV\n\nAS4\n19204\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Abbestellung der Aggregationsebene der Bilanzkreissummenzeitreihe auf Ebene der Regelzone — view of ÜNB\n\n\nBackend (customer)\n\n\nMACO APP · ÜNB\n\n\nBKV\n\n\n1. Abbestellung der Aggregationsebene RZ\nAS4 · PI 17207\n\nCreate transaction\nCreate process data\n\n2. Antwort\nAS4 · PI 19204 · E_0022\nE_0022 — Abbestellung der Aggregationsebene RZ prüfen\n\nUpdate transaction\nUpdate process data\n"} titel="ÜNB" /> ## Process steps ### Order cancellation of aggregation level RZ
**Check identifiers** - [17207](/en/schnittstellen/202604/pruefi/ORDERS/PI_17207) — Order cancellation/placement BK-SZR at aggregation level RZ · AS4
**Flow**
  1. Message from **BKV** · AS4
  2. **Write endpoint** - Transaction created — `ERSTELLEN_PROZESSDATEN` Creates a new transaction in the backend with the data of the incoming message.
### Response
**Check identifiers** - [19204](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19204) — Rejection of order placement/withdrawal of the aggregation level · AS4
**Flow**
  1. Message to **BKV** · AS4
    **Response per decision tree** - `19204` → [E_0022](/en/referenz/202604/ebd/E_0022) · ÜNB · Check order cancellation of aggregation level RZ
  2. **Write endpoint** - Transaction updated — `AKTUALISIEREN_PROZESSDATEN` Updates the existing transaction in the backend once the message has been created.
Decision trees of this process | EBD | Name | |---|---| | [E_0022](/referenz/202604/ebd/E_0022) | Check order cancellation of aggregation level RZ |
## Process information Wording of the consolidated version, profile ch. 11.7.1, p. 152.
  1. ### Preconditions A valid BK contract exists for the BK at the stated time of change.
  2. ### Results The ÜNB deactivates the MaBiS-ZP for the BK-SZR (category B) as well as all LF-SZR (category B) assigned to the MaBiS-ZP of the BK-SZR (category B) at RZ level from the agreed point in time for the BK.
  3. ### Further requirements For the balancing group, the order cancellation can also take place without an already existing MaBiS-ZP at control area level.
  4. ### First message **BKV** sends “Order cancellation of the aggregation level RZ” (Step 1). From here on, the party involved on this page takes its turn.
  5. ### Objective The ÜNB knows the BK and the point in time at which it has to send the BK-SZR (category B) to the BKV exclusively at BG level via the BIKO.
## 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 BKV](/en/prozessdoku/202604/BKV/MaBiS-abbestellung-der-aggregationsebene-der-bilanzkreissummenzeitreihe-auf-ebene-der-regelzone) — BKV *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 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) 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), [2](#schritt-2)