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  1. #1
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    Cessna Warning Panel Offsets

    Noob question time . I have laid hands on a phidgets LED 64 card, that I want to use to drive the O/M/I indicators, and the warning panel lights for a Cessna 17x/18x.

    Fs2Phidgets appears to be a great little piece of software that reads the outputs from FS (or is it FSUIPC?) and makes the magic work. Unfortunately, I am having trouble finding the offsets for the warning lights in the dropdown list. I have also looked at the offset list in the FSUIPC sdk, and am no closer to finding the correct output to reference.

    Has anyone done this and gotten the offsets for the following?

    L VAC R
    L Low Fuel R
    Oil Press
    Volts



    I am trying to sync up my panel with the same values as the default 172 uses to light the indicator.

    Thanks in advance for any help you can provide!

    Reid
    http://juneaucessnasim.blogspot.com
    N58243 (virtual)- Low and Slow...

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    Cessna 172 Offsets

    For AK Mongo:

    You will find ALL of the Cessna Default C172 Offsets in the tables in this product manual:

    http://simkits.com/downloads/documen...april_2009.pdf

    Hope this helps!

    Cheers,

    Alex
    Building An Airbus In My Garage!

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    500+ This must be a daytime job



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    Re: Cessna 172 Offsets

    Alex,

    If they are in there, I am still having problems finding them. What am I missing?

    Pages 29 and 30 list the FS outputs, but none of the warning panel indicators are evident. The OMI markers are great to have, but I am still struggling. Did you use offsets to drive your led warning panel?
    http://juneaucessnasim.blogspot.com
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    Re: Cessna 172 Offsets

    Hi Reid,

    I had a look at FSUIPC doc this morning, but did find what you are looking for. According to me, you won't find offsets that correspond exactly to your wish.

    You can find offset like 2834 : Generator bus voltage or 0B7C left tank level, but they give you the value of the data, not an alarm.
    I thing you have to do some programming : if generator bus voltage less than xx Volt then set Volt alarm light. I guess FS2Ph is a good tool for this.

    Cheers.
    Patrick.

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    Re: Cessna 172 Offsets

    Quote Originally Posted by caKus View Post
    You can find offset like 2834 : Generator bus voltage or 0B7C left tank level, but they give you the value of the data, not an alarm.
    I thing you have to do some programming : if generator bus voltage less than xx Volt then set Volt alarm light. I guess FS2Ph is a good tool for this.

    Cheers.
    Patrick.
    I thought that may be the case. Does anyone know how to tell in FSX what levels trigger the warning panels?

    For example, do the warnings light at 10% fuel left in the tank? 5%? Certain number of pounds or gallons?

    What VAC level? What Oil Pressure, etc?

    Or is there a way to "interrogate" FSX for that info?
    http://juneaucessnasim.blogspot.com
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    500+ This must be a daytime job



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    Re: Cessna 172 Offsets

    Quote Originally Posted by AK Mongo View Post
    I thought that may be the case. Does anyone know how to tell in FSX what levels trigger the warning panels?

    For example, do the warnings light at 10% fuel left in the tank? 5%? Certain number of pounds or gallons?

    What VAC level? What Oil Pressure, etc?

    Or is there a way to "interrogate" FSX for that info?
    Think I have found some answers that I will share.

    1. There is a program called FSInterrogate2std that comes in the FSUIPC SDK. It allows you to check values in FS of about 1600 variables. When FS is running, it allows you to check and see what a lot of this stuff does, and by fiddling around with FS you can change the values in FSInterrogate to see which offsets correspond to some of this stuff.

    2. I can't find any way to get the info from the annunciator gauge about what logic it uses to light the idiot warning. It would have saved time if I had, but c'est la vie.

    3. Offsets for the warnings appear to be:
    VOLTS: Main Bus Volt 2840 Trigger: <28V
    L FUEL: Left Main Tank Level OB7C Trigger:≤ 30.2%
    R FUEL: Rt Main Tank Level 0B94 Trigger: ≤30.2%
    OIL PRESS: Engine 1 Oil Press 08BA Trigger: <20
    I may also add >100 as this is where the red line is on the gauge, but I don't know how to drive oil pressure up that high to see if it lights the gauge.

    L VACUUM R: Suction 0B18 Trigger: Wild Guess here, so I am inferring it will light with the red lines on the guage. <3.5 and >6

    Now I am on to FS2Phidgets to try and figure out how to make the logic work. For example, I want all of these lights to light only if the triggers are met AND the battery switch is on. Might need to post a new topic in that forum.

    Hope my effort can help someone else so they don't reinvent the wheel.

    Reid
    http://juneaucessnasim.blogspot.com
    N58243 (virtual)- Low and Slow...

  7. #7
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    Re: Cessna 172 Offsets

    Just an update, I got all of the lights working now.

    I would be very indebted to someone if they could tell me under what circumstances the bar in the upper right of the panel lights up. Does it just come on when the test function is activated, or does it serve some other purpose. Sharing of Simkits or real life experience would be very helpful.

    Reid
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  8. #8
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    Re: Cessna 172 Offsets

    AK Mongo, I have over 2000 hours in the small stuff as an Instructor, and I honestly cannot remember that red bar coming on besides the test function. Next time I am in a R or SP model, I'll play around with it. Lately been flying around in a Grumman tiger...

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    Re: Cessna 172 Offsets

    Thanks WJH. That is the answer I assumed and ran with.

    Reid
    http://juneaucessnasim.blogspot.com
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    Re: Cessna 172 Offsets

    Quote Originally Posted by AK Mongo View Post
    Just an update, I got all of the lights working now.

    I would be very indebted to someone if they could tell me under what circumstances the bar in the upper right of the panel lights up. Does it just come on when the test function is activated, or does it serve some other purpose. Sharing of Simkits or real life experience would be very helpful.

    Reid
    Can you share the logic in how you got this working!

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