Appendix B - Serial Interface Specifications
GNS 480 (CNX80) Installation Manual 560-0982-01 Rev A
B-9
Table B- 6 - Moving Map ASCII Navigation Data
ID Data
Format
Length Description
c vDddd
7
CDI:
v =
Nav Flag
{ ‘-‘ Flagged || ‘v’ Valid }
D = Needle { ‘C‘ Center || ‘L’ Left || ‘R’ Right }
ddd =
Deflection Value
ASCII (000 – 100)
l
(lower case
L)
dddddd
6
Distance to Destination:
dddddd = nm * 10
p
sdddd
7
s = ± dddd = {0000 - 5999}
Pressure Altitude (-1500 to +5999 tens of feet +/- sea level).
Field is dashed when invalid “-----”.
v vDddd
7
VDI:
v =
VDI Flag
{ ‘-‘ Flagged || ‘v’ Valid }
D = Needle { ‘C‘ Center || ‘U’ Up || ‘D’ Down }
ddd =
Deflection Value
ASCII (000 – 120)
h sddd
4
Horizontal Command Signal:
s=sign: L = bank left. R = bank right. X = invalid data.
ddd = degrees * 10
w
See Table B- 7
18
Moving Map Binary Route Data
Table B- 7 - Moving Map Binary Route Data
Byte Data
Format
Description
1 w
Item
designator
2-3
dd
Current waypoint number in ASCII (01h to 20h)
4 xiannnnn
Sequence
number
x = undefined
i = 1 if last waypoint
a = 1 if active waypoint
nnnnn = unsigned binary waypoint number
5-9
ddddd
ASCII waypoint identifier
10
11
12
sddddddd
xxmmmmmm
xhhhhhhh
Waypoint latitude - packed, unsigned binary
s = sign: 0 for north, 1 for south
ddddddd = degrees
mmmmmm = minutes
hhhhhhh = hundredths of minutes
x = undefined
13
14
15
16
sxxxxxxx
dddddddd
xxmmmmmm
xhhhhhhh
Waypoint longitude
s = sign: 0 for east, 1 for west
dddddddd = degrees
mmmmmm = minutes
hhhhhhh = hundredths of minutes
x = undefined
17
18
nnnnnnnn
nnnnnnnn
Magnetic variation at waypoint
LS byte (msbit...lsbit)
MS byte (msbit...lsbit)
Two’s complement binary in sixteenths of degrees, easterly variation is
positive.
19
<CR>
ASCII carriage return (0Dh)
Summary of Contents for GNS 480
Page 1: ...GNS 480 CNX80 Color GPS Nav Com Installation Manual September 2004 560 0982 01 Rev A...
Page 10: ...Table of Contents viii 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Page 30: ...General Information 1 20 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Page 126: ...Periodic Maintenance 6 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Page 150: ...Appendix D Interconnect Diagrams D 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
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