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JS41 Heading Events Guide

Just some useful information for you.
 
Load up the J41. Goto the MCP/PRO tab and enable the device.
 
For the MCP/PRO DISPLAY_HEADING input set the Light/Disp Data to HDGBug. This is an lvar variable for the heading that is unique for the J41.
 
Next goto into detective. Enable the Events Toggle and the Lvars Toggle. Let it run for 10 seconds and then filter the detected events and lvars. Next create the following two bespoke events (the attached zip file contains the events if you wish to import them):
 
 
Name: HDG Increase
If IrcHdgKnob > 98 Next Else NextSkip
IrcHdgKbob = -1
IrcHdgKbob += 1
Send 66587 with 26902 (ROTOR_BRAKE)
 
Name: HDG Decrease
If IrcHdgKnob < 1 Next Else NextSkip
IrcHdgKbob = 100
IrcHdgKbob -= 1
Send 66587 with 26901 (ROTOR_BRAKE)
 

Now go back the MCP/PRO tab and assign HDG Increase to the clockwise ROTARY_HEADING input and HDG Decrease to the anticlockwise ROTARY_HEADING input.

You should now be able to set the heading and see the display on the MCP PRO.
Note that the IrcHdgKnob variable that is listed in the Bespoke Events is only to show the knob rotating in the VC. You can leave all those entries out and just leave the Send commands. It appears complicated because IrcHdgKnob can only be a value between 0 and 99 for the animations to work.
 
Remember that when Detective is running the sample rate is 4Hz and so the displays may appear slugglish. Shut down Dectective and the sample rate will return to 30Hz and the displays will be much more responsive.
 
Best wishes
Steve

Comments

  • edited November -1

    You might also want to add:

    Send 66587 with 8031 (ROTOR_BRAKE)

    if you wish to hear the rotary dials 'click' as they go around.

    I must confess that I thought the range allowed for the dials was 1 to 100, rather than 0 to 99, but I have that on second-hand information (from LINDA LUA files). Where did you garner this info, Steve? I'm sure yours is most likely right, but it'd be useful to know for sure! ;)

    Cheers

    Neil

  • edited November -1

    Hi Neil,

    Detective shows it goes to 99, and not 100.

    Best wishes

    Steve

     

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