User Manual
AFIRS 228S Iridium Global Communications System Installation Manual
16 July 2014 L-3 Aviation Recorders Proprietary Page 28
165E5733-00 Rev. 03
3.8 ARINC 429 Receiver Protocols
Table 3-4 – ARINC 429 Receiver Protocols – ATSU/FWC
Source: ATSU / FWC
Speed: High
(Configurable)
Label Parameter Format Transmit Rate
172 ATSU Identifier Word BCD 1 s
270 ATSU Status Word and Monitoring
Boolean
word
600 ms
307 SDU SAL HYB
377 ATSU Equipment Identifier BCD 1 s
ARINC 618
Block Uplink
BOP (GFI=Eh) ISO 5 N/A
ARINC 618
Block Downlink
BOP (GFI=Eh) ISO 5 N/A
Table 3-5 – ARINC 429 Receiver Protocols – MCDU
Source: ARINC 739A MCDU
Speed: Low
(Configurable)
Label Parameter Format Transmit Rate
377 MCDU Identifier BCD 1 s
270 Discrete Word #1
Discrete
word
1 s
350 Maintenance Word #1
Discrete
word
1 s
307 SDU SAL HYB