This Site is Inactive This site has been marked as inactive because no members have logged in recently. Function code The function code (FC) in the telegram header identifies the telegram type, such as Request telegram (Request or Send/Request) and Acknowledgement or Response telegram (Acknowledgement frame, Response frame). In addition the function code contains the actual transmission function and control information that prevent loss and duplication of messages, or the station type with. Discover releases, reviews, credits, songs, and more about Donna Summer - Donna Summer at Discogs. Complete your Donna Summer collection. Donna summer donna summer 1982 rar. Clock synchronization The time master reads its current time and starts an internal timer. As soon as the time event (TE) telegram is sent with the read time, this internal time is stopped. In a subsequent counter value (CV) telegram, the time difference between the read time and the sent time is transmitted. On receipt of the TE telegram, the receiving station also starts its own internal timer. The value of this internal timer plus the current value from the TE telegram and the correction value from the counter value (CV) telegram give the time to be set. Address byte The two address bytes in the telegram header of telegrams (Request, Confirmation and Response telegrams) contain the station’s destination address (DA) and source address (SA). 7 6 5 4 3 2 1 0 DA: Destination address 0 — 127 (0x7F) Destination address 0 1 no DSAP (SAP = NIL) DSAP present 7 6 5 4 3 2 1 0 SA: Source address 0 – 126 (0x7E) Source address 0 1 no SSAP (SAP = NIL) SSAP present Address 127 is reserved as a global address for broadcast or multicast messages (telegrams to all bus users or user groups selected via service access point; only allowed with ). The address byte of the Request telegram should be reflected in the Response telegram in reverse, i.e. The SA byte of the Response telegram contains the destination station address and the DA byte the source station address of the Request. For formats with a PDU, the address extension serves to identify a destination and/or source address extension in the form of a that immediately follows the FC byte in the PDU. The address extensions of a Request telegram must be reflected in the Response telegram in reverse. If the address extension bit has not been set, it is the special SAP = NIL. This Service Access Point has the advantage that its telegram is 2 bytes shorter and is therefore used for cyclic data exchange.
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