Garmin GNC 420A Installation Manual page 121

D.6 SHADIN FUEL/AIRDATA COMPUTER SENTENCE
The GARMIN 400 Series units shall be capable of receiving the following message strings from the Shadin
Fuel/Airdata or Airdata Computer:
<STX>
ZA012<CR><LF>
ZB345<CR><LF>
ZC678<CR><LF>
ZD<+/->9012<CR><LF>
ZE<+/->3456<CR><LF>
ZF<+/->78<CR><LF>
ZG<+/->90<CR><LF>
ZH123<CR><LF>
ZI456<CR><LF>
ZJ<+/->78<CR><LF>
ZK<+/->901<CR><LF>
ZL234<CR><LF>
ZM5678<CR><LF>*
ZN90123<CR><LF>*
ZO4567<CR><LF>*
ZP89012<CR><LF>*
ZQ345<CR><LF>
ZR678<CR><LF>
<ETX>
Where:
<STX> start-transmit character (0x02)
<CR> carriage-return character (0x0d)
<LF> line-feed character (0x0a)
<+/-> sign indicator (0x2b["+"] or 0x2d["-"])
<ETX> end-transmit character (0x03)
*Not available from Airdata Computer
Note: Checksum is calculated by adding each byte in the message (including all characters from <STX>
up to and including the error log/reason indicator), such that carries are discarded to give a one byte result.
The ASCII-coded decimal representation of that byte is given, ranging from 0 (0x30, 0x30, 0x30) to 255
(0x32, 0x35, 0x35).
400 SERIES INSTALLATION MANUAL
P/N 190-00140-02
"ZA" (ASCII characters); "012" represents indicated Air Speed (knots)
"ZB" (ASCII characters); "345" represents true Air Speed (knots)
"ZC" (ASCII characters); "678" represents Mach Speed (thousandths)
"ZD" (ASCII characters); sign; "9012" represents pressure altitude (tens of feet)
"ZE" (ASCII characters); sign; "3456" represents density altitude (tens of feet)
"ZF" (ASCII characters); sign; "78" represents outside air temperature (Celsius)
"ZG" (ASCII characters); sign; "90" represents true air temperature (Celsius)
"ZH" (ASCII characters); "123" represents wind direction (degrees from north)
"ZI" (ASCII characters); "456" represents wind speed (knots)
"ZJ" (ASCII characters); sign; "78" represents rate of turn (degrees per second)
"ZK" (ASCII characters); sign; "901" represents vertical speed (tens of ft/minute)
"ZL" (ASCII characters); "234" represents heading (degrees from north)
"ZM" (ASCII characters); "5678" represents fuel flow, right (tenths gallons/hour)
"ZN" (ASCII characters); "90123" represents fuel used, right (tenths gallons)
"ZO" (ASCII characters); "4567" represents fuel flow, left (tenths gallons/hour)
"ZP" (ASCII characters); "89012" represents fuel used, left (tenths gallons)
"ZQ" (ASCII characters); "345" represents error log/reason indicator
"ZR" (ASCII characters); "678" represents checksum
Page D-3
Page Rev L