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|  MIL-D-81347C(AS)
Ordnance Output Logic
3.5.2.4.5
Functional Description - The Ordnance Output Logic (OOL) is the
3.5.2.4.5.1
interface between the computer and the Aircraft Ordnance System. The OOL shall receive and decode
commands from the computer and transmit commands to the Aircraft Ordnance System. The OOL
shall allow the computer to select and launch sonobuoys from either the non-pressurized or the three
pressurized launchers, select and launch SUS, select sonobuoy depth and life, control the pressurized
launcher doors, and interrogate the SLT Status, the SUS Away Status and the Wing and Bomb Bay
Weapon Station Status via the AOIL.
Figure 67 is a Functional Flow Diagram for the Ordnance Output
Logic .
General Description - The OOL shall perform the following
3.5.2.4.5.2
functions:
(1) Upon computer command interrogate the AOIL for up to
five status words.
(2) Upon computer command select and launch SUS Shallow,
SUS Deep, or SUS Shallow and Deep.
(3) Upon computer command selectively open and close the
three pressurized doors.
(4) Upon computer command select Sonobuoy Hydrophore Depth
(shallow or deep).
(5) Upon computer command select Sonobuoy Life (long or short).
(6) Upon computer command interrogate the SLT to verify
Stores-in-Place.
(7) Upon computer command select and launch from one of
three pyrotechnic pressurized sonobuoy launchers.
(8) Upon computer command select and launch from one of 48
pyrotechnic, non- pressurized sonobuoy launchers.
(9) Detect and transmit to the AOIL the following errors:
(a) Input word structure is improper (i. e., upper and
lower half words not identical or bits in the Ordnance Category Field and the Armament Category Field
simultaneously).
(b) Redundant status logic not in agreement.
(c) Redundant launch logic not in agreement.
Operating Requirements - Because of the critical nature of the
3.5.2.4.5.3
Ordnance system, precautions shall be taken to guard against erroneous launch operation.
(1) The computer shall transmit a 30-bit command to the OOL
utilizing the External Function with the constraint that bits 0-14 must be identical to bits 15-29.
(2) Bits 12-14, and 27-29 shall be used for Armament and/or
IFPM Category codes and bits 8-11 and 23-26 shall be used for Ordnance and/or IFPM Category codes.
The Armament Category field and the Ordnance Category field shall not contain bits simultaneously.
(3) The Ordnance Category codes shall be minimum distance 2
except for codes used for test modes.
151
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