Rmi Data Format - FreeFlight 2101 I/O Approach Plus Installation And Checkout Manual

FreeFlight 2101 I/O Approach Plus GPS Navigation System
B.5.3

RMI Data Format

The Rocky Mountain Instruments µEncoder Airdata System transmits a 61-byte ASCII data frame once per second.
The RMI configuration consists of the following parameters:
NUMBER
Page B-4
Baud:
Parity:
Start Bit:
Data Bits:
Stop Bit:
Update Rate:
Data Format:
BYTE
BYTE NAME
01 ID #1
02 ID #2
03 - 07 IALT
08 - 12 PALT
13 - 17 DALT
18 - 20 KTS
21 - 23 TAS
24 - 26 MACH
27 - 30 VSI
31 - 33 OAT
34 - 36 TAT
37 - 40 InHg
41 - 44 Inds
45 - 61 -
1200
None
1
8
1
1 msg/sec
61 byte unpacked BCD data message (See Table below)
DESCRIPTION
Hex Identifier Byte -- always FFH
Hex Identifier Byte -- always 80H
Current Indicated Altitude
Pressure Altitude
Density Altitude
Indicated Airspeed in knots
True Airspeed in knots
Indicated Airspeed in MACH
Vertical Speed in fpm (multiplied by 10)
Outside Air Temperature
True Air Temperature
Altimeter Setting (inches Mercury)
Indicator Flags (See Table below)
Manufacturer's Use
Revision E
May 31, 2006