ERP1 Addressed Data Telegram Format

Owned by Matthias Kassner
11-Jul-2024
1 min read

It is possible to specify the intended receiver (the destination) of a telegram by prefixing the telegram content with the R-ORG 0xA6 (ADT = Addressed Data Telegram) to indicate that a destination address is present and including the DESTINATION EURID before the SENDER EURID as shown below.

image-20240701-082827.png
ERP1 Addressed Data Telegram Format

Telegram fields

The ERP1 telegram format contains the following fields:

  • Preamble
    This field is used to indicate the start of the transmission and allows the receiver to determine the values for high and low amplitudes and adjust the AGC (automatic gain control) as needed.

  • SOF
    This field indicates the Start of Frame which allows the receiver to determine the start of the bit stream

  • R-ORG
    This field specifies the EEP or SIGNAL type used by this telegram

  • DATA
    This field contains the telegram payload

  • SENDER EURID
    This field specifies the address of the sender

  • STATUS
    This field specifies transmission properties such as the repeater hop count

  • HASH
    This field is used to verify the integrity of the telegram using either a CRC or a Checksum algorithm

  • EOF
    This field indicates the End of Frame which allows the receiver to determine the end of the bit stream