Appendix B - Serial Interface Specifications
GNS 480 (CNX80) Installation Manual
560-0982-01 Rev L
B.2.1.1
Moving Map Data
Definitions of the Moving Map output data are included in Table B-6 and Table B-7. A sample output
message is included in Figure B-3.
The serial output messages are in the following format.
<STX><id><data><it><id><data><it>...<id><data><it><ETX>
<STX> ................................................... ASCII “start of text” character (1 byte, 02h)
<id> ........................................................ item designator (1 byte, from following table)
<data> .................................................... item data (format listed in following table)
<it> ........................................................ item terminator (1 byte, 0Dh)
<ETX> ................................................... ASCII “end of text” character (1 byte, 03h)
Table B-6. Moving Map ASCII Navigation Data
ID Data
Format
Length Description
A sddmmhh
7
Present
latitude
s =sign: N for north, S for south
dd = degrees
mm = minutes
hh = hundredths of minutes
B sdddmmhh
8
Present
longitude
s = sign: E for east, W for west
ddd = degrees
mm = minutes
hh = hundredths of minutes
C
ddd
3
Track (magnetic): ddd = degrees
D
ddd
3
Ground speed: ddd = knots
E
ddddd
5
Distance to active waypoint: ddddd = nm x 10
G
sdddd
5
Cross track error:
s = sign: R for right, L for left of course
dddd = distance off course, hundredths of nm
I
dddd
4
Desired track (magnetic):
dddd = degrees x 10
K
ddd[dd]
3 to 5 Active waypoint identifier:
ddd[dd] = ASCII waypoint identifier
L
dddd
4
Bearing to active waypoint (magnetic):
dddd = degrees x 10
Q sddd
4
Magnetic
variation:
s = sign: E for east, W for west
ddd = degrees x 10
T
---A-----
9
Warnings: The 4th character will be an “A” when the navigation
data is flagged, otherwise, all characters will be dashed. All other
navigation data will be dashed when it is flagged.
a eampht
8
Annunciator Flags:
e =
Approach Enabled
{ ‘-‘ (off) || ‘O’(on) }
a =
Approach Active
{ ‘-‘ (off) || ‘O’(on) || ‘B’ (blink)}
m =
Message
{ ‘-‘ (off) || ‘O’(on) || ‘B’ (blink)}
p =
Parallel Track
{ ‘-‘ (off) || ‘O’(on) }
h =
Hold
{ ‘-‘ (off) || ‘O’(on) || ‘B’ (blink)}
t =
From/To
{‘–‘ (off) || ‘T’ (To) || ‘F’ (From)}
Summary of Contents for GNS 480
Page 1: ...GNS 480 CNX80 Color GPS NAV COM Installation Manual November 2008 560 0982 01 Rev L...
Page 10: ...Table of Contents viii 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 32: ...General Information 1 22 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 80: ...Installation Procedures 2 48 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 134: ...Periodic Maintenance 6 2 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 158: ...Appendix D Interconnect Diagrams D 2 560 0982 01 Rev L GNS 480 CNX80 Installation Manual Notes...
Page 192: ...D 36 560 0982 01 Rev Notes...
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