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  1. #1
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    System Logic Question

    I have a question about what sort of input/output card and software could accomplish this task:

    I turn on window heat 10 minutes before taxiing on a 90 degree day. The overheat circuit trips the window heat off illuminating the amber indicators and extinguishing the green indicators.

    I perform a reset of the window heat by cyling the four switches and each of the amber indicators extinguishes in turn. During the reset cycling, the green indicators do not illuminate, it only extinguishes the amber indicators esentially starting over again with all window heat off.

    Could logic be programmed for a certain ambient temperature or an ambient temperature and a taxi speed (relative wind helping to cool the glass)?

    "If the ambient air temperature is at or above XX degrees with window heat ON and taxi speed is at or below XX degrees, window heat will trip off."

    "If window heat is tripped OFF, green indicators will extinguish and amber indicators will illuminate."

    I'm very curious about what would be needed to accomplish this.
    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



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  2. #2
    300+ Forum Addict AchillesP's Avatar
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    Hi,

    Actually I have started to build this logic two days ago. It is very tricky logic but it can be done. The logic says that if it is a clear day (without clouds) and the TAT temperature is more that 30 celsious then the windows heat indicators will come on even if the switches are off after 3 minutes. In case you have the switches on then a window overheat will comes after 3 minutes with sixpack antiice and master caution indications. (In real the overheat is more than 145 F) If you close the switches then after 5 minutes the overheat goes off. And many other if's according to the book. Until now I have finished the logic but I have to disable the logic (that comes with pmsystems) of the test switch to work fine. I hope to find a solution very soon. I will make the logic public when it is fully working

    Achilles

  3. #3
    Boeing 777 Builder


    Kennair's Avatar
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    Whew! You are really getting down to the nitty-gritty here Mike. I can only speak for OpenCockpits interfaces and certainly these along with it's program language SIOC could accommodate this. FS has various temperature offsets such as OAT=0E8C but there's also Lower Temp, Surface Temp, Temp drift, Temp day/night variation (don't know exactly what the differences are). It would be a matter of your switches connected to inputs and LED's connected to outputs, then SIOC would be scripted to provide LED on/off dependent on switch position and Temp value. Not sure about the Taxi speed cooling factor however, this may be getting a little picky

    I don't know the exact parameters of the SIOC script file but if you did go down this road I'm sure Nico Kaan (Kiek) would help. As I mentioned in another thread, Opencockpit cards and SIOC can give you all the functionality of PMSystems if you learn what you're doing.

    Ken.
    Opencockpits | Aerosim Solutions | Sim-Avionics | P3D | FDS | FTX | AS16 | PPL | Kennair


  4. #4
    2000+ Poster - Never Leaves the Sim Michael Carter's Avatar
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    Thanks for the replies guys.

    I mis-typed a word in my first post. It should be "XX knots" not "XX degrees"
    when refering to a taxi speed.

    Just curious about what I might be getting myself into with this level of functionality.
    Boeing Skunk Works
    Remember...140, 250, and REALLY FAST!

    We don't need no stinkin' ETOPS!



    Powered by FS9 & BOEING

  5. #5
    2000+ Poster - Never Leaves the Sim kiek's Avatar
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    Quote Originally Posted by Boeing Skunk Works View Post
    "If the ambient air temperature is at or above XX Knots with window heat ON and taxi speed is at or below XX Knots, window heat will trip off."

    "If window heat is tripped OFF, green indicators will extinguish and amber indicators will illuminate."
    Sure, you can program this in SIOC if ambient air temp and taxi speed can be made available to SIOC via FSUIPC offsets.


    Nico

  6. #6
    2000+ Poster - Never Leaves the Sim Trevor Hale's Avatar
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    That could be programmed in PMsystems as well, for the same IF that Nico stated.

    I am sure there is an offset for ambient air, and I know you could compare that to your airspeed.

    And using a phidgets Output board or LED64

    Trev
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  7. #7
    2000+ Poster - Never Leaves the Sim kiek's Avatar
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    If you only want to control annunciators, and if you are able to program in SIOC, you only need the Opencockpits USB outputs board which is capable of controlling 64 leds (or lamps).

    Costs are only EUR 56, SIOC is free.

    Nico

  8. #8
    500+ This must be a daytime job 737NUT's Avatar
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    Just don't mix OC cards with phidgets!!!!!!!!!!!!

    Here is my recommendation,
    1) SIOC using the 64 output USB card. It will do your entire overhead and MIP!!!! It will do ANY of the logic you want as long as there are offsets for the data. So far i have not found anything that can't be done! NOTICE!!!!!!!!!! Fuse each group of 8 outputs with a 2 amp fuse. Don't ask me why i recommend this! Lets just say i learned the hard way.

    or

    2) Phidgets and PMSystems.

  9. #9
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    But i have problem with my OC USB OUTPUTS it introduce ground noises in my rig system...

  10. #10
    2000+ Poster - Never Leaves the Sim kiek's Avatar
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    advice: always use the same GND for all your systems in your sim ... this holds for every electronic system.

    Nico

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