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 Flap and slat indication / memo section R Figure 027
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 Flap and slat indication / memo section R Figure 028
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 **ON A/C ALL
R  13. Warning and Memo Section________________________ The lower part of the upper ECAM display unit is dedicated to the display of Warning messages and memo messages. The location as well as the organization of the different lines are given in the following figure 
R  **ON A/C 106-149, 303-399, 401-499,
 (Ref. Fig. 027) 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
 (Ref. Fig. 028) 
R  **ON A/C 106-149, 303-399, 401-499,
 (Ref. Fig. 029) 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302, 
R  (Ref. Fig. 030)
 **ON A/C ALL
 A. Operation The lower part of the display provides the pilot with either warning/ caution or memo messages. Special memos or check-list as landing memo or take-off memo are provided on this display. At last, special messages such as STS, ADV or overflow arrow can be also displayed. The following description explains in general the partitioning and the use of the different zones. The description and the various texts which are delivered by the FWC for display on the upper ECAM DU is given in the chapter 315100 . 

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 Display unit lower section assignment R Figure 029
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 Display unit lower section assignment R Figure 030
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 B. Partitioning The lower part is divided in 2 zones separated by a grey stripe. The left zone contains 7 lines of 24 characters whereas the right one contains 7 lines of 12 characters.

R **ON A/C 106-149, 303-399, 401-499,
 B. Partitioning The lower part is divided in 2 zones separated by a grey stripe. The left zone contains 8 lines of 27 characters whereas the right one contains 8 lines of 14 characters.
 **ON A/C ALL
 C. Warning Messages These messages are displayed first on the left zone and have priority on the left memo messages. If the number of lines of the whole text of the warning/caution messages exceeds 7, the titles of the not shown failures are written on the right zone and they have priority over the right memo messages displayed . The secondary failures are displayed on the right zone and they have priority over right memo messages .
 D. Overflow Indication When the text of warning/caution messages exceeds the capacity of the display, a green overflow arrow appears below the grey stripe. This arrow concerns only warning messages and does not deal with memo messages. This arrow remains displayed on the screen as long as there are texts still waiting for display.
 E. Memo Messages They are shared in two lists, on the left and right parts. They are displayed when no warnings/caution messages are presented. As previously mentioned, the memo messages can be either A/C system functions which are selected (LDG LT,...) or special check-lists like take-off memo or landing memo.
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 F. STS And ADV Messages Added to the overflow indication, two draw attention symbols may appear on the display:
 -STS It appears below the grey ribbon at the same location as the overflow arrow provided that this one is away. This message indicates to the pilot that the status page is no more empty.
 -ADV It appears only in single display configuration to signal to the pilot that a parameter drifts in an A/C system. As the corresponding system page cannot be displayed on the lower ECAM display unit, the pilot has to fetch the information on the ECAM control panel : the associated pushbutton switch flashes to indicate which system is concerned.
R

R **ON A/C 106-149, 303-399, 401-499,
 (Ref. Fig. 031)

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
R (Ref. Fig. 032)
 **ON A/C ALL
 14. Acquisition and Wiring
______________________
 A. ECU (Fadec System) Each engine control unit issues 4 output buses which always convey the same data 2 by 2. Each ECU is fully redundant; in case of failure of channel A, channel B takes over. Each DMC receives and processes one 'A' bus and one 'B' bus from each engine ECU. The DMCs take the needed parameters preferably on the bus corresponding to the channel in control (label 275, bits 26 or 27). If a parameter is invalid on one bus, the DMC takes it on the other bus. If this parameter is available neither on the bus 'A' nor the bus 'B' the corresponding indication is either flagged (XX) or cleared, depending on the nature of the parameter.
　
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