B&R does not puplic share detailed information about the functionalities which can be used to write data to the encoder memory. Some information which were puplic available in the past have been removed from the newer Automation Studio Help. The information about the EPROM Functionblock does not help you much, as you will also need the address offset in the Memory, which can be changed by B&R with newer Stroage alignments without notice.
If you are not familiar with B&R i would not recomend to try to write to the Encoder Memory with B&R Hardware (ACOPOS).
If you have a B&R Motor (like you stated in the other Post 8LSA66…) which had its commutation angle stored in the Encoder Memory and due to some “Defect”, this data is no more Valid you should send it to the B&R Repair Service were it can be fixed.
If the repair is not an option due to cost or shipping. You should use your motor as an 3rd Party Motor with the Parameter Table in Automation Studio, were you can provide the commutation offset without storing to the encoder memory.
If you want to use the write to encoder Functionality in a series Machine refer to your local B&R sales, in special cases B&R does provide such functionalites / documentations.
Please avoid to use existing Threads, if they are solved and you have a different question.