Planned downtime, by its nature, is something that an ASPSP anticipates and therefore is able to give advance notice to TPPs. It is not generally possible to give advanced notice of unplanned downtime, but ASPSPs should give notice as soon as they are aware of the downtime.
Other pages in this section Downtime Implementation of a new OBIE Standard Changes to an ASPSP's Infrastructure, Configuration or Software Notification of a Change