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Page 1: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 2: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 26: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 27: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 28: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 29: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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�NiNwKr(|�t��n�xu�ojtI��rxh¤rnqNt �.¦@ñ hj�rxuym��¨rxqNt uy�prnmprxwK�Nt�uy�N����ræu�rnwN�!� l�hj| uy� �\�0uy��hyo× d��uy�Nm�h��\�prnm�|�t�rxt�lIzyrnqNt�uy��m�rxwN�Ktµuy�N�¢��rxu�rxwK�b� l�hj| r]��hv{.mpojmprxuy�=�\uy�Km�h��E��rxmp|�tXrxtIl��Izjmp�NqNmpsNmpr

uy�N��lnt��ntXr\��m�oj�Nuy����z0uy�N��rxqKt!{ Ý × ��ræuªrxwN���

�Nt9hjw=rxiNwKr?|�t��n�nuyojtÝ hj�ræuymp�N�,u\i}h¡��tIlT¯]hj�v�nm�oy�0uy�rxh�rxqNt9{ Ý × uy�N�¬u��nt d hj�N�¬hywKrxiNw=rd|�tI�n�nuyojt�lnt��nwN��rx�Mm���rnqNt���rxl�hjsNmp�No¢hy�Au(�9u�r qK�Nhjo�rnm�|�tIl��d

Altimeter Digital

Altimeter Analog

Digital Altimeter

Pilot

Interface

Device of Interest

(DOI)Switch Altitude

Watchdog Timer

Power-on Signal

Strobe

DOI Status Signal

altitude

status

altitude

status

altitude

status

Inhibit Signal

Reset Signal

à mpojwNlnt�Ù=� bf9hj|�|vwN�Nm u�rxmphj��ü9tXr]�9t�tI�²f9hj|�i}hj�NtI�rn�R} Ù d

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Page 31: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 32: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 33: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Page 34: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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{Fail,NCD,Test,Norm}

{-50..2500} DA2-Alt-Signal

INT

DA2-Status-Signal {Fail,NCD,Test,Norm}

DA1-Status-Signal

INT{-50..2500} DA1-Alt-Signal

{Invalid,Valid} Analog-Alt-Status

{Below,Above}

SUPERVISORY

Analog-Alt-Signal

MODE

Cockpit Controls

Watchdog Timer

Altimeter 1 DigitalAnalog

Altimeter

Altitude Switch

Cockpit

Fault Indicator Lamp

On

Off

INFERRED SYSTEM STATE

DOI-Status

Unknown Fault-detectedOffOn

Unknown

Cannot-be-determined

Below-threshold

At-or-above-threshold

Aircraft Altitude

Valid

Invalid

Unknown

Valid

Unknown

Invalid

Analog-Alt

Valid

Invalid

Unknown

Altimeter 2 Digital

(DOI) Interest

of Device

{High} DOI-Power-On

DOI-status-signal {On, Off}

Watchdog-Strobe {High}

Inhibit {On,Off}

Reset {T,F}

Dig1-Alt

Dig2-Alt

Operational

Fault Detected

Startup

Inhibited

Not Inhibited

MODES CONTROL

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Output Command

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DOI-Power-On

Destination: DOI

Acceptable Values:

Initiation Delay:

{high}

0 milliseconds

Completion Deadline: 50 milliseconds

Exception-Handling:

Feedback Information:

Variables:

(What to do if cannot issue command within deadline time)

DOI-status-signal

Values: high (on)

Relationship: Should be on if ASW sent signal to turn on

Min. time (latency): 2 seconds

Max. time: 4 seconds

Exception Handling:

Reversed By:

DOI-Status changed to Fault-Detected

Turned off by some other component or components. Do not know which ones.

Comments: I am assuming that if we do not know if the DOI is on, it is better to turn it on again, i.e., that the reason for the restriction is simply hysteresis and not possible damage to the device.

This product in the family will turn on the DOE only when the aircraft descends below the threshold altitude. Only this page needs to change for a product in the family that is triggered by rising above the threshold.

References:

CONTENTS

= discrete signal on line PWR set to high

TRIGGERING CONDITION

T

TPrev(Altitude) = At-or-above-threshold

Altitude = Below-threshhold

State Values DOI-Status = On F

TOperational

Not Inhibited T

Control Mode

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F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ ]_^

Output Command

Watchdog-Strobe

Destination: Watchdog Timer

Acceptable Values: high signal (on)

Min-Time-Between-Outputs:

Max-Time-Between-Outputs:

0

200 msecPERIOD

Exception-Handling:

Feedback Information: None

Reversed By: Not necessary

Comments:

References:

CONTENTS

= High signal on line WDT

TRIGGERING CONDITION

State Values T

F

Time >= (Time entered Altitude.Cannot-be-determined) + 2

Time <=

F

DOI-Status = Fault-detected

DL

T

secs.

Operating Mode TOperational

T

T

Startup

Inhibited

200 msec (Time sent Watchdog Strobe) +

.

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]8` F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Operating Mode

ASW

Description:

Comments:

References:

Appears in:

No information about how an internal fault is detected, what types detected, etc.

DOI-power-on, Watchdog-strobe

DEFINITION

= Startup

Powerup T

= Operational

Startup T T

Controls.Reset = T T

T

Analog-Alt = Valid T

T

T

Dig-Alt1 = Valid

Dig-Alt2 = Valid

= Internal-Fault-Detected

TInternal-fault -detected

Startup

Time >= Time entered Startup + 3 secs

T

T

.

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F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ ]b]

State Value

DOI-Status

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

Goes into unknown state

There is nothing in the requirements that says what to do if a power-off message is sent and no status message is received from the DOI within 2 seconds. I decided it was safest to have this indicate a possible fault so the watchdog will time out and light the fault indicator lamp in

References:

Appears in:

the cockpit.

DOI-Power-On, Watchdog-Strobe

DEFINITION

= On

DOI-status-signal = On T

= Off

DOI-status-signal = Off T

= Unknown

T

T

T

DOI-status-signal = obsolete

Controls.Reset = T

Powerup

= Fault-Detected

Time >= (Time sent DOI-Power-On Message) + 2 seconds

T

T

T

DOI-status-signal = Off

Time > Time received DOI-status-signal + 2 seconds

T

Column 1: Sent power on message but DOI did not turn on Column 2: Sent power on message but never got feedback

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State Value

]dc F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Altitude

e=f3gih3j kig!l!kim3lik!n

2 seconds oip l!k!qsrut h3m%vxwzy!m%{%j m%|%nt

k!gil!~�t qsr�t h3m%n}�zh%�@�@k!msrug!n

k0��k!~�kim3lik!g!n�q%q%k!y!~�g(t m%n�

Because the altitude-status-signals change to obsolete after 2 seconds, altitude will change to Unknown if all input signals are lost for 2 seconds.

DOI-Power-On

DEFINITION = Unknown

Dig-Alt1 = Unknown

Analog-ALT = Unknown

Dig-Alt2 = Unknown

Controls.Reset

T

T

T

T

T

Powerup

= Below-threshold

Dig1-Valid-and-Below

TAnalog-Valid-and-Below

Dig2-Valid-and-Below T

T

= At-or-above-threshold

T FT

T

T

T

FTT T

F

F F

F F

Analog-Valid-and-Above

Dig1-Valid-and-Above

Dig2-Valid-and-Above

T

F

T

T F T

= Cannot-be-determined

Analog-Alt = Invalid

Dig-Alt1 = Invalid

Dig-Alt2 = Invalid

T

T

T

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State Value

Analog-Alt

Obsolescence: 2 seconds

Exception-Handling: Will change to unknown when analog-alt-signal becomes obsolete (more than 2 seconds elapse since last message from Analog Altimeter)

Description:

Comments:

References:

Appears in: Altitude

DEFINITION

= Valid

Analog-Alt-Status = Valid T

= Invalid

Analog-Alt-Status = Invalid T

= Unknown

T

T

T

Analog-Alt-Status = Obsolete

Powerup

Controls.Reset = T

.

Page 41: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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State Value

Dig-Alt1

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

References:

Appears in:

Will change to unknown when DA1-Status-Signal becomes obsolete (more than two seconds elapse since last mesage from Digital Altimeter 1).

Altitude

DEFINITION

= Valid

DA1-Status-Signal = Norm T

= Invalid

TDA1-Status-Signal = {Fail, NCD, Test}

= Unknown

DA1-Status-Signal = Obsolete

Powerup

Controls.Reset = T

T

T

T

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State Value

Dig-Alt2

Obsolescence: 2 seconds

Exception-Handling: Will change to unknown when DA2-Status-Signal becomes obsolete (more than two seconds elapse since last mesage from Digital Altimeter 2).

Description:

Comments:

References:

Appears in: Altitude

DEFINITION

= Valid

DA2-Status-Signal = Norm T

= Invalid

DA2-Status-Signal = {Fail, NCD, Test} T

= Unknown

T

T

T

DA2-Status-Signal = Obsolete

Powerup

Controls.Reset = T

.

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Input Value

DOI-Status-Signal

Source: DOI

Type: Enumerated

Possible Values (Expected Range): {On, Off}

Exception-Handling:

Arrival Rate (Load): ??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling: Assumes value Obsolete

Description:

Comments:

References:

Appears in: DOI-status

DEFINITION

= FIELD (Status in DOI-Status-Message)

Receive DOI-Status-Message FROM DOI

= PREV (DOI-Status-Signal)

T

Receive DOI-Status-Message FROM DOI

Time <= Time (DOI-Status-Message arrived) + 2 seconds T

F

= Obsolete

F

T

T

Receive DOI-Status-Message FROM DOI

Time > Time (DOI-Status-Message arrived) + 2 seconds

Powerup

Page 44: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ ]b�

Input Value

Analog-Alt-Status

Source:

Type:

Analog Altimeter

Enumerated

Possible Values (Expected Range):

Exception-Handling:

Arrival Rate (Load):

{Invalid, Valid}

??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

References:

Appears in: Analog-Alt

Assumes value Obsolete

DEFINITION

= FIELD (Status in Analog-Alt-Message)

Receive Analog-Alt-Message FROM Analog-Altimeter T

= PREV (Analog-Alt-Status)

F

T

Receive Analog-Alt-Message FROM Analog-Altimeter

Time <= Time (Analog-Alt-Message arrived) + 2 seconds

= Obsolete

F

T

TStartup

Receive Analog-Alt-Message FROM Analog-Altimeter

Time > Time (Analog-Alt-Message arrived) + 2 seconds

Page 45: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

c8� F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Input Value

Analog-Alt-Signal

Source: Analog Altimeter

Type: Enumerated

Possible Values (Expected Range): {Above, Below}

Exception-Handling:

Arrival Rate (Load): ??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling: Assumes value Obsolete

Description:

Comments:

References:

Appears in: Altitude

DEFINITION

= FIELD (Altitude in Analog-Alt-Message)

Receive Analog-Alt-Message FROM Analog-Altimeter

= PREV (Analog-Alt-Signal)

T

Receive Analog-Alt-Message FROM Analog-Altimeter

Time <= Time (Analog-Alt-Message arrived) + 2 seconds

F

T

= Obsolete

F

T

T

Receive Analog-Alt-Message FROM Analog-Altimeter

Time > Time (Analog-Alt-Message arrived) + 2 seconds

Powerup

Page 46: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ cV^

Input Value

DA1-Status-Signal

Source: Digital Altimeter 1

Type: Enumerated

Possible Values (Expected Range): {Fail, NCD, Test, Norm}

Exception-Handling:

Arrival Rate (Load): ??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence:2 seconds

Exception-Handling: Assumes value Obsolete

Description:

Comments: Four possible values can be sent signifying Failure Warning, No Computed Data, Functional Test, and Normal Operation.

References:

Appears in: Dig-Alt1

DEFINITION

= FIELD (Status in DA1-Message)

Receive DA1-Message FROM Digital-Altimeter-1 T

= PREV (DA1-Status-Signal)

F

T

= Obsolete

Time > Time (DA1-Message arrived) + 2 seconds

Receive DA1-Message FROM Digital-Altimeter-1

Powerup

F

T

T

Receive DA1-Message FROM Digital-Altimeter-1

Time <= Time (DA1-Message arrived) + 2 seconds

Page 47: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

cR` F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Input Value

DA1-Alt-Signal

Source: Digital Altimeter 1

Type: integer

Possible Values (Expected Range): -20..2500

Exception-Handling: Values below -20 are treated as -20 and values above 2500 as 2500

Units: ??

Granularity: ??

Arrival Rate (Load): ??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

References:

Appears in: Altitude

DEFINITION

= FIELD (Altitude in DA1-Message)

Receive DA1-Message FROM Digital-altimeter-1 T

= PREV (DA1-Alt-Signal)

Receive DA1-Message FROM Digital-altimeter-1 F

= Obsolete

Receive DA1-Message FROM Digital-Altimeter-1

Time > Time (DA1-Message arrived) + 2 seconds

Powerup

F

T

T

Page 48: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ c8]

Input Value

DA2-Status-Signal

Source:

Type:

Digital Altimeter 1

Enumerated

Possible Values (Expected Range):

Exception-Handling:

Arrival Rate (Load):

{Fail, NCD, Test, Norm}

??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

Assumes value Obsolete

Four possible values can be sent signifying Failure Warning, No Computed Data, Functional Test, and Normal Operation.

References:

Appears in: Dig-Alt2

DEFINITION

= FIELD (Status in DA2-Message)

Receive DA2-Message FROM Digital-Altimeter-2 T

= PREV (Dig2-Status-Signal)

Receive DA2-Message FROM Digital-Altimeter-2

Time <= Time (DA2-Message arrived) + 2 seconds

F

T

= Obsolete

T

Receive DA2-Message FROM Digital-Altimeter-2

Time > Time (DA2-Message arrived) + 2 seconds

F

TPowerup

Page 49: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

cbc F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Input Value

DA2-Alt-Signal

Source: Digital Altimeter 2

Type: integer

Possible Values (Expected Range): -20..2500

Exception-Handling: Values below -20 are treated as -20 and values above 2500 as 2500

Units: ??

Granularity: ??

Arrival Rate (Load): ??

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: 2 seconds

Exception-Handling:

Description:

Comments:

References:

Appears in: Altitude

DEFINITION

= FIELD (Altitude in DA2-Message)

Receive DA2-Message FROM Digital-altimeter-2 T

= PREV (DA2-Alt-Signal)

Receive DA2-Message FROM Digital-altimeter-2 F

= Obsolete

Receive DA2-Message FROM Digital-Altimeter-2

Time > Time (DA2-Message arrived) + 2 seconds

Powerup

T

T

F

Page 50: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ cR�

Control Input

Inhibit

Source: Cockpit Inibit Button

Type: Enumerated

Possible Values (Expected Range):

Arrival Rate (Load):

Min-Time-Between-Inputs: Max-Time-Between-Inputs:

Obsolescence: None

Description:

Comments:

References:

Appears in: ASW

{on, off}

DEFINITION

= FIELD (Value in Inhibit-Message)

Receive Inhibit-Message from Cockpit

= PREV (Inhibit)

Receive Inhibit-Message from Cockpit

= Obsolete

T

F

Powerup T

Page 51: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

c8� F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Control Input

Reset

Source: Cockpit Reset Button

Type: Signal

Possible Values (Expected Range):

Arrival Rate (Load):

Min-Time-Between-Inputs:

{High}

Max-Time-Between-Inputs:

Obsolescence:

Description:

Comments:

Not applicable (lasts only one step)

References:

Appears in: Analog-Alt, DOI-Status, Altitude, Analog.Alt, Dig-Alt1, Dig-Alt2, ASW

DEFINITION

= True

Receive Inhibit Signal T

= False

Powerup T

TPrev (Reset) = True

Page 52: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

F�GIHJG3K�L=M�NOK�PRQ!S#TVU%W�NXG'Y(P8HJZ[UI\ cR�

Macro

Analog-Valid-and-Below

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Analog-alt = Valid

Analog-Alt-Signal = below

T

T

Macro

Analog-Valid-and-Above

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Analog-alt = Valid

Analog-Alt-Signal = above

T

T

Page 53: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

c8� F�GJHIG3K�L=M�NaK0PRQ!S#T_U1W2NXG3Y(P8HJZ[UJ\

Macro

Dig1-Valid-and-Below

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Dig1-alt = Valid

THRESDA1-Alt-Signal < 2000

T

T

Macro

Dig1-Valid-and-Above

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Dig-Alt1 = Valid

THRESDA1-Alt-Signal >= 2000

T

T

Page 54: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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Macro

Dig2-Valid-and-Below

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Dig2-alt = Valid

DA2-Alt-Signal < 2000THRES

T

T

Macro

Dig2-Valid-and-Above

Description:

Comments:

References:

Appears in: Altitude2

DEFINITION

Dig-Alt2 = Valid

DA2-Alt-Signal >= 2000THRES

T

T

Page 55: Massachusetts Institute of Technologydspace.mit.edu/bitstream/handle/1721.1/35848/16...uymp wNl t h µrxqNt ¦@ñ rxh¤i;t l hjl | m rx wN rxm hy nq0u bs;t m N Nm u rntI ¨rxh¤rnqNt

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