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  1. #1
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    Question Recall Panel on B737NG


    Hello fellow builders,

    I'm currently working on the Master Caut switch and recall panel on my B737NG glareshield. I use PMSystems and I want to simulate the annunciation of warnings via the sixpack using PMSystems.

    On the real aircraft the recall panel is also a large "button" which you can push to recall any warnings via the annunciators. Now I think PMSystems will (if not already) allow simulation of the recall function on the sixpack.

    My question is...if anybody has done it can they tell me whether they use a momentary switch for the recall panel or do they use a simple single throw single pole switch?????

    I know this is probably dependent on how it is coded in the PMSystems logic for the recall panel but it looks to me that a STSP switch is a more logical choice. I couldn't tell which to use as the logic for this in the B737 logic file in PMSystems appears to be incomplete.

    Look forward to hearing from you.

    Cheers,
    Luke

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    Quote Originally Posted by luker22 View Post
    On the real aircraft the recall panel is also a large "button" which you can push to recall any warnings via the annunciators.
    Is it? I thought it was, effectively, the 6-pack display itself. Yes, maybe that is the one "large button" as well as being 6 indicators?

    With the PFC MCP, because the indicators are fixed, not "buttoned", Enrico programmed the recall via a double-press on the Master Caution button/indicator. A single press extinguishes the 6-pack indications, a double-click recalls them.

    This is in the PM MCP program. I don't know if it is a general implementation or specific to the PFC serial connection.

    Regards

    Pete

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    Hi Peter,

    Thanks for your reply. Yes I initially through the annunciator panel was just that, another panel, but after watching many Just Planes DVDs and some footage on youtube of B737NG flightdecks it is definitely a button.

    That is, the annunciators (the six pack) are actually mounted on a large button which you can press to recall any alerted conditions.

    I guess using the Master Caut button to recall messages as you do in your setup is a workable solution if you only have a "static" six pack panel and I guess implementation is dependant on how "real" you want to make the flightdeck operate.

    You may want to see my post (if you didn't already spot it) in the PM General Q&A forum (which I accidently posted this thread to initially).

    I haven't looked into the PM MCP program as PMSystems seems to model this so I was under the assumption that it was only present in the PMSystems software. Perhaps Enrico put it there (in the PM MCP) for folks with static six packs such as you seem to have ???

    Cheers,
    Luke

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    Lightbulb

    Depending on the capabilities in your interface / interface software, you could just send two master caution "keypresses" when you push the six-pack.

    Or you could contact Enrico / PM and get a dedicated offset for that function - if it doesn't exist.

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    Quote Originally Posted by luker22 View Post
    That is, the annunciators (the six pack) are actually mounted on a large button which you can press to recall any alerted conditions.
    Yes, I know they are touch-sensitive for recall. I just didn't realise they acually all depressed like a button.

    I guess using the Master Caut button to recall messages as you do in your setup is a workable solution if you only have a "static" six pack panel and I guess implementation is dependant on how "real" you want to make the flightdeck operate.
    It is close, and I really have no choice in how it works as I am no good at building things and only use ready-made PFC stuff at present.

    I haven't looked into the PM MCP program as PMSystems seems to model this so I was under the assumption that it was only present in the PMSystems software. Perhaps Enrico put it there (in the PM MCP) for folks with static six packs such as you seem to have ???
    No, specifically he drives certain ready-built MCP models directly with code in the MCP package software. The PFC MCP is one of those his code drives directly.

    Regards

    Pete

  6. #6
    75+ Posting Member PeterH's Avatar
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    Hi,

    did you try the 56F8.1 offset yet for recall?

    Best rgds

    Peter

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    PMSystems, Phidgets, Recall Switch and Sixpack

    Hi Peter and other fellow builders,

    Yes I finally got around to wiring the six pack annunciators and recall switch and the offset 56F8.1 worked like a charm in activating the recall switch

    But I've hit a problem with phidgets and pmsystems....

    This weekend I took the opportunity to finish the Capt side sixpack annunciators and recall switch.

    Now I'm wiring and testing using Phidgets, PMSystems and FS2Phidgets, but I've hit some problems that some of you may have encountered and have a solution for....

    Basically what happens is when a sixpack annunciator (controlled by PMSystems) is lit, then when I press the recall switch, I want all the sixpack annunciators to light up (while the momentary recall switch is pressed), then when released it should light up any annunciators that indicated a problem condition and extinguish all others.

    I tried doing this by assigning (using a LED64 Phidget) the various annunciators in the phidgets.txt file used by PMSystems. I then assigned all the annunciators and the recall switch to one common circuit under FS2Phidgets and made it "Push to Test".

    So far so good. When I press the recall switch every annunciator lights up and when I release the switch it all goes dark. That is fine.

    BUT when PMSystems is started and the sixpack indicates a problem eg "FLT CONT" when the Yaw damper is turned off for example , and the right annunciator lights up, I then press the recall switch and find that everything lights up as expected but when I release the switch everything goes off including the problem indication "FLT CONT" ...which should remain lit. Now when I turn the Yaw Damper back on and the off to re-light the annunciator, it doesn't work at all... PMSystems loses the plot...and toggling the Yaw damper switch only momentarily lights the "FLT CONT" like for about a microsecond or not at all...

    When I operate without using FS2Phidgets however the annunciators work fine though PMSystems however I cannot then get the annunciators to light when pressing the recall switch as happens in the real aircraft as I've lost the ability to assign a circuit via FS2Phidgets...

    To me it seems like FS2Phidgets is somehow interfering with the PMSystems logic once the use of the circuit to light all the annunciators is triggered by the recall switch being pressed....

    Is there any way around this problem or can I do a similar thing as the circuit function in FS2Phidgets via PMSystems...

    Hope to hear from some of you...

    Cheers,
    Luke

  8. #8
    75+ Posting Member PeterH's Avatar
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    Hi Luke,
    if I understand you correctly you´ve made a Phidget logic to have a "test" button in order to make all lamps light up when pressed.

    As I don´t use Phidgets but FSBus I hardly can tell whether this logic may interfere with PMsystems.
    May I just make another proposal for the "test button". Just take 6 Diodes and 6 resistors (in series with the diodes in order to limit the current) each one connecting to 1 annunciator lamp (hopefully LED) and use a 2 contact momentary switch which will put + voltage thru one contact to the diodes and via the other contact it activates "reset".

    Would that probably solve your problem?

    Best rgds

    Peter

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    Hi Peter and other fellow builders,

    I did some further testing by removing FS2Phidgets software out of the loop and just using PMSystems thus forgoing the "test" function...and I finally got it to WORK!!! just through PMSystems.

    In the logic file for the 737 I find:

    if recallswitch then
    sixpackfltcontdisp = 0
    sixpackhyddisp = 0
    ....
    ....etc
    else
    sixpackfltcontdisp = sixpackfltcont
    sixpackhyddisp = sixpackhyd
    ....
    ....etc
    endif

    So I found all I had to do was set sixpackflcontdisp, sixpackhyddisp and all other sixpack...disp variables = 1 rather than 0 as in the logic file in the recallswitch code. I also found that I had assigned the wrong variable to my phidget outputs...the non "disp" ones i.e sixpackhyd instead of sixpackhyddisp....

    When rectified the above an I tried it....it worked like a charm. Very nice !!!

    Cheers,
    Luke

  10. #10
    75+ Posting Member PeterH's Avatar
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    Hi Luke,

    good to hear you´ve got it working.

    One question though: in which logic file did you find the recallswitch?

    Would like to ammend those changes but can´t find it in Thomas Richter´s 737 logic file (pmsys1051ng. lgc)

    Best regards

    Peter

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