Serial Interface Specifications
62
Apollo GX50/60/65 Installation Manual
F
UEL
/ A
IR
D
ATA
C
OMPUTER
I
NPUT
The fuel / air data input is used to input fuel flow and airdata computer information from the
Shadin ADC-200 fuel / air data computer.
The format of the fuel / air data computer input is as follows, which conforms to the Shadin
“S” format serial message. Definition of the input message data that the GX50/60/65 uses is
included in Table 12. A sample input message is illustrated in Figure 21.
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.
<STX><message><message> ... <message><chksum><ETX>
<STX>............................................... ASCII “start of text” character (STX = 02h)
<message>......................................... starts with an ASCII “S”, then an ID character,
followed by the message data, a carriage return (CR
= 0Dh), and a line feed (LF = 0Ah) See the
following table.
<checksum> ...................................... the message checksum, same format as message
<ETX> .............................................. ASCII “end of text” character (ETX = 03h)
Altitude Sign Altitude in Feet
Temperature Sign
Example 1
Altitude Encoder/ Internal Temperature
Converter Identifier Message Checksum
210 feet above sea level (@29.92 gh)
#AL +25D4
with temperature of 25
°
C
Altitude Sign Altitude in Feet
Temperature Sign
Example 2
Altitude Encoder/ Internal Temperature
Converter Identifier Message Checksum
45 feet below sea level (@29.92 gh)
#AL -45DE
with temperature of 45
°
C
Status Code
Example 3
Message Checksum
Indicates encoder is warming up
#AL -12E9
(is still below +25
°
C)
Figure 20 Altitude Data Input
Summary of Contents for GX50
Page 4: ...NOTES ...
Page 8: ...Table of Contents iv Apollo GX50 60 65 Installation Manual NOTES ...
Page 28: ...Installation 20 Apollo GX50 60 65 Installation Manual Figure 12 RS 232 Serial Connections ...
Page 29: ...Installation Apollo GX50 60 65 Installation Manual 21 Figure 13 GX60 65 Comm Wiring Diagram ...
Page 46: ...Specifications 38 Apollo GX50 60 65 Installation Manual NOTES ...
Page 48: ...Limitations 40 Apollo GX50 60 65 Installation Manual NOTES ...
Page 52: ...Periodic Maintenance 44 Apollo GX50 60 65 Installation Manual NOTES ...
Page 54: ...Environmental Qualifications 46 Apollo GX50 60 65 Installation Manual NOTES ...
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