 |
|||
|
|
|||
| ||||||||||
|
|  MIL-D-70789A (AR)
APPENDIX D
30.4.6 Message: ALERT DATA
To: Prime System
From: DRU
5 or 6 (The length of the data field is
Number of Data Characters:
established by the Expanded Alerts
Data Format: Binary
configuration flag (3.5.8.8.k))
MESSAGE STRUCTURE
ERROR DET.
STATUS
ECHO
CODE (E) FLAG(F)
DATA(D)
SEQ#(N) IDENTIFIER(I) S1,S2
FLAG(F)
16 bits
01111110
D1-D5 or
16 Bits
00110
01111110 XXX
D1-D6
The presence of a "1" in a bit position of this data signifies that a
problem exists that requires operator action
D1 Character
Problem
Bit Set
7
Spare.
Spare.
6
Spare.
5
4
Spare.
Spare.
3
DRU Over Temperature. DRU is too hot.
2
1
DRU Automatic Temperature Compensaton In Process. The DRU has
performed a gyro PLC reset and realignment iS in process.
Previous Shutdown Abnormal. During a normal shutdown, non-volatile
0
DRU memory is updated with present position and azimuth. If power
is removed prior to performing a normal shutdown, memory is not
updated with this data. The next time the system is turned on, the
operator is alerted that the stored data is invalid.
In addition, an abnormal shutdown shall be indicated when one or
more of the following conditions exist at shutdown:
a.
A Normal/Stored
Heading Alignment was not completed.
Alert Data D2/4
(Usable to Complete align).
b.
c.
Alert Data D2/3
(Align Interrupt).
d
Alert Data D3/1
(Excessive Rates).
185
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals