737-300 400 500 AMM 飞机维护手册 导航 NAVIGATION 4(80)

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 B.  FMCS Digital Inputs (Fig. 6)
 (1)  
The FMC receives data in digital format from several different sources. The Digital Analog Adapters (DAA), collect data from various analog sensors, and reformat the analog data into digital ARINC 429 format. The DAA digital outputs are applied to FMC input ports.

 (2)  
Figure 6 shows all of the input data words read by the FMC.

 C.  FMC Digital Outputs (Fig. 7)
 (1)  The FMCS provides digital data to various systems. Two output buses are used. All data words are available on both buses. Figure 7 shows the FMC output data words, and the systems that use the words.
 D.  Discrete Input/Output
 (1)  In addition to the digital inputs and outputs, discrete signals are also input to and output from the FMC. The discretes are either 5-volts or 28-volts. These signals are buffered and translated to TTL logic levels within the FMC. Management and interpretation of these discretes is a function of the I/O processor.
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INPUT DATA WORD  SOURCE BUS 
A/T-1  CLK-R-1  DAA-L-2  DAA-R-2  DADC-L-4  DADC-R-4  IRU-L-3  IRU-R-3  MCP-3 
033 ILS FREQUENCY 034 VOR FREQUENCY 035 DME FREQUENCY 102 SELECTED ALTITUDE  X X X  X X X  X 
125 GREENWICH MEAN TIME 137 FLAP POSITION 155 DAA MAINTENANCE DISCRETES 173 LOC DEVIATION  X  X X  X X  X 
202 DME DISTANCE 203 ALTITUDE 205 MACH 204 BARO CORRECTED ALTITUDE 1  X  X  X X X  X X X 
206 CAS 210 TAS 211 TAT 213 SAT  X X X X  X X X X 
220 BARO CORRECTED ALTITUDE 2 222 VOR OMNIBEARING 247 TOTAL FUEL 270 IRS DISCRETES  X X  X  X  X  X  X 
272 AFDS DISCRETE WORD 1 274 AFDS DISCRETE WORD 3 310 PRESENT POSITION - LAT 311 PRESENT POSITION - LONG  X X  X X  X X 
312 GROUND SPEED 314 TRUE HEADING 320 MAGNETIC HEADING 324 PITCH ANGLE  X X X X  X X X X 
325 ROLL ANGLE 356 A/T BITE RESPONSE 356 DAA BITE RESPONSE 356 DFCS BITE RESPONSE  X  X  X  X  X  X 
361 INERTIAL ALTITUDE 365 INERTIAL VERTICAL SPEED 367 E-W VELOCITY 366 N-S VELOCITY  X X X X  X X X X 

M1175 FLIGHT MGMT COMPUTER FMCS Digital Inputs Figure 6
A737-300/400/500MAINTENANCE MANUAL
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D2161B A8 INITIALIZATION A9
DATA M1161 IRU NO. 1
D1647A 37 N1 LIMIT DATA 38
M917 AUTOTHROTTLE D2165B PERFORMANCEA10 AND NAV DATA

A11 M1163 DAA NO. 1
D2791BVNAV, LNAV

9GUIDANCE

8 M924 FCC AD1657BD2179A VNAV, LNAV

429
G9
9GUIDANCE
8XMTR H9 FMC-01

M923 FCC B D2163BD2179B FMC-02

429 D7 A8 INITIALIZATION XMTR E7 A9 DATA
M1162 IRU NO. 2D2167A PERFORMANCEA10M1175 FLIGHT AND NAV DATAA11MANAGEMENT COMPUTER
M1164 DAA NO. 2

DATA WORDS OUTPUT  SOURCE BUS  FMC-01  FMC-02 
DESTINATION  DAA L  IRU L  A/T  FCC A  FCC B  DAA R  IRU R 
001 DISTANCE TO GO WAYPOINT 012 GROUND SPEED 034 VOR FREQUENCY 035 DME FREQUENCY 041 SET LATITUDE  X X X X  X  X X X X  X 
042 SET LONGITUDE 043 SET MAGNETIC HEADING 075 GROSS WEIGHT 102 FMC ALTITUDE  X X  X X  X  X  X X 
103 FMC AIRSPEED 104 VERTICAL SPEED COMMAND 106 FMC MACH 114 DESIRED TRACK 115 WAYPOINT BEARING  X X  X X X  X X X  X X 
116 CROSS-TRACK DEVIATION 117 VERTICAL DEVIATION 121 HORIZONTAL COMMAND SIGNAL 213 STATIC AIR TEMPERATURE  X X  X  X  X  X X 
　
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