NOTE : Reserved for ACARS
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EIS DISPLAYS - DESCRIPTION AND OPERATION
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1.
General
_______ (Ref. Fig. 001) The EIS Navigation Display (ND) is derived from the flight plan data, data selected via the FCU and dynamically changing data such as aircraft present position, wind speed and direction, ground speed, track, etc. FM (Flight Management) data transmitted to the ND is divided into two groups: dynamic and Each FMGC sends one EIS output bus (high speed) to the 3 DMCs. The DMC which operates on side 1 uses FMGC1 data, and the DMC which operates on side 2 uses FMGC2 data. If one FMGC EIS bus is no longer valid, the DMC(s) which normally use its data will automatically switch over to the EIS bus of the other FMGC. If the EIS bus of the first FMGC is valid, the DMC(s) will revert to it. If the two FMGC EIS buses are not valid, the DMC(s) will permanently switch from one to the other until finding a valid one. Meanwhile, the amber message MAP NOT AVAIL will be displayed on the ND (if they are in ROSE-NAV or ARC or PLAN modes). It is possible to select the display mode, the display range, and various display options on the FCU. The selectable modes are ARC, ROSE-VOR, ROSE-ILS, ROSE-NAV, and PLAN. The range selections available are 10, 20, 40, 80, 160 and 320 NM. Terminal area ranges are defined as 10, 20, 40 or 80 NM. En route ranges included 160 and 320 NM. The various pushbutton switch display options available are waypoints, navaids, nondirectional beacons, airports, and waypoint constraints. The next paragraphs detail the edit areas associated with the selectable modes, the available display symbols, the pushbutton switch options and their display rules and the flight plan displays. If data coming from the FCU is invalid, default mode and range selections of ROSE-NAV and 80 NM are used. (Ref. Fig. 002)
2.
System Description
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A. EDIT Area Definition
(1) ARC (MAP) Mode (Ref. Fig. 003) The edit area in ARC mode is rectangular and varies in size according to the range selection on the FCU. The ND is oriented heading up with the aircraft position at the bottom of the CRT at the intersection of the horizontal and vertical axes. The horizontal axis is the lateral axis of the aircraft and the vertical axis is the current heading of the aircraft. The heading is magnetic referenced.
FMGC - EIS Interface
Figure 001
Different Modes on ND
Figure 002
ARC Mode EDIT Area
Figure 003
The table below defines the distances used for determining the dimensions of the edit area with respect to the range selected on the FCU. The range is from the aircraft present position to the scale line near the top of the screen. Data is displayed from the bottom of the screen area to the scale line. ARC Edit Area Variation:
-------------------------------------------------------------------------------| | RANGE (NM) SELECTED | | PARAMETER |-------------------------------------------------------| | | 10 | 20 | 40 | 80 | 160 | 320 | |---------------------|--------|--------|--------|--------|---------|---------| | AHEAD OF AIRCRAFT | 10.5 | 20.5 | 40.5 | 80.5 | 160.5 | 320.5 | | | | | | | | | | BEHIND AIRCRAFT | 3.5 | 7 | 14 | 28 | 56 | 112 | | | | | | | | | | BESIDE AIRCRAFT | 8.3 | 16.6 | 33.2 | 66.4 | 132.8 | 265.6 | -------------------------------------------------------------------------------
(2) ROSE Mode (Ref. Fig. 004) There are three ROSE modes for which data must be provided: ROSE-VOR, ROSE-ILS and ROSE-NAV. ROSE-VOR and ROSE-ILS do not have defined edit areas, therefore only the data specified below are provided when these modes are selected:
-ROSE-VOR : Dynamic data only are provided
-ROSE-ILS : Dynamic data only are provided. The edit area in ROSE-NAV mode is rectangular and varies in size according to the range selection on the FCU. The ND is oriented heading up with the aircraft in the center of the CRT. The heading is magnetic referenced. The following table defines the distance used for determining the dimensions of the edit area with respect to the range selected on the FCU. The range is the diameter of the external scale circle. Data is displayed on the whole screen surface defined by the circle. Additionally the VOR course is provided if any has been selected. ROSE-NAV Edit Area Variation:
ROSE-NAV Mode EDIT Area
Figure 004
-------------------------------------------------------------------------------| | RANGE (NM) SELECTED | | PARAMETER |-------------------------------------------------------| | | 10 | 20 | 40 | 80 | 160 | 320 | |---------------------|--------|--------|--------|--------|---------|---------| | AHEAD OF AIRCRAFT | 7.6 | 14.7 | 28.9 | 57.3 | 114.1 | 227.7 | | | | | | | | | | BEHIND AIRCRAFT | 7.1 | 14.2 | 28.4 | 56.8 | 113.6 | 227.2 | | | | | | | | | | BESIDE AIRCRAFT | 7.1 | 14.2 | 28.4 | 56.8 | 113.6 | 227.2 | ------------------------------------------------------------------------------- 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM AUTO FLIGHT 自动飞行4(42)
