Garmin Apollo CNX80 Installation Manaul - page 141
Appendix B - Serial Interface Specifications
GNS 480 (CNX80) Installation Manual
560-0982-01 Rev L
Example Fuel / Airdata Input Data
223 knots indicated air speed
SB230
230 knots true air speed
SC101
0.101
mach
SD+3200
32,000 feet pressure altitude
SE+3312
33,120 feet density altitude
SF+05
+5°C outside air temp
SG-03
-3°C true air temp
SH010
wind direction at 10° (relative to true north)
SI015
wind speed at 15 knots
SJ+03
+3° / second right turn
SK-050
-50 feet / second vertical air speed
SL359
359° heading (relative to true north)
SM0123
12.3 gallons / hour - right engine fuel flow
SN0300
30.0 gallons used - right engine
SO0131
13.1 gallons / hour - left engine fuel flow
SP0310
31.0 gallons used - left engine
SQ000
no
errors
SR01227
122.7 gallons remaining
S*123
Checksum (example only, not actual)
end of message string
Figure B-2. Fuel/Air Data Input (S Format)
B.1.2.2
“Z” Data Format
The format of the fuel/air data computer input is as follows, which conforms to the Shadin “Z” format
serial message. Definition of the input message data that the GNS 480 uses is included in Table B-4.
Baud rate: ............................................... 9600
Data bits: ................................................ 8
Stop bits: ................................................ 1
Parity: ..................................................... none
Expected input rate: ............................... approx. 1 second
Message length: ..................................... variable (512 character max.)
The serial input message string is expected in the following format.
by the message data, a carriage return (CR = 0Dh), and a
line feed (LF = 0Ah) See the following table.