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IRS Button assignment for PMDG

skythelimit · 2026-01-05T22:00:09Z

Hi John, I'm trying to assign IRS buttons to go to PMDG events in the usual way discussed here, specifically the SYS Display selector and the Display Selectors shown in the image below: The link above states that you have 2 options for the Parameters, either Mouse Click Codes (which I have used until now) or Direct Values as follows: I believe I need to be able to use Direct Values for the IRS, because these are knobs. The Direct Values seems to be as follows from the sdk:- So in my sioc script I am doing the usual and writing to those 2 offsets as follows, this is an example for the DISP SEL "TEST" position on the knob: Var 0760, name TESTCtrl, Link FSUIPC_OUT, Offset $3110, Length 4 Var 0761, name TESTParam, Link FSUIPC_OUT, Offset $3114, Length 4 So the above parameter for TEST is 0 and the Control Event is 69632 + 229 = 69861 So in my SIOC script I have the following, placing the Parameter before the Control, as I understand is the recommended way: Var 0730, name IRS_TEST, static, Link IOCARD_SW, Device 7, Input 48 // IRS TEST ROTARY SWITCH { IF &IRS_TEST = 1 { &TESTParam = 0 &TESTCtrl = 69861 } } But this does not work, I can see in sioc the button press is producing the values above, but they don't seem to be doing anyhting in pmdg. The SIOC script works fine for mouse clicks but not these Direct Values

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Posts: 19

skythelimit

Registered

Topic starter

January 8, 2026 4:22 pm

(@skythelimit)

Joined: 3 weeks ago

Thx John, looking at my log, I think the issue is caused because x3110 and x3114 are getting written to from my script a large amount by my flap and speedbrake levers, as the pot values jitter, and every time they change the script sends to these offsets.

But given the flap and speedbrake work fine, the issue is just with the IRS buttons, so I could send these buttons a different way from my script to fsuipc. For example, I could get the script to do a keypress and then assign this in fsuipc to the PMDG event. Or even better, can you send to a virtual button so then I can assign this in fsuipc under Buttons?

Posts: 173

FSUIPC Support

Moderator

January 8, 2026 4:59 pm

(@fsuipc-support)

Joined: 3 months ago

You could try either…you can trigger a virtual button by writing to the virtual button offsets. Unfortunately I am away from my PC for the next few days, back Sunday evening. I can help yiu further then, but check the iffset status document for the virtual button area.

John

Posts: 19

skythelimit

Registered

Topic starter

January 9, 2026 10:35 pm

(@skythelimit)

Joined: 3 weeks ago

Hi John, I’m trying to set virtual button for the IRS knob, which has 5 positions (TEST, TKGS, WIND, PPOS, HDG). When I turn the knob, my sioc script writes to this offset x3340 and sets the bit respectively, be it bit 0,1,2,3 or 4.

If bit 0 is TEST and bit 1 is TKGS, when I move the knob from TEST to TKGS, I would Setbit 1, but do I also need to release (ie Clearbit) bit 0? Otherwise I assume the bit will stay at 1 (on).

And if I move to WIND, I would Setbit 2 and Clearbit 1 (and probably a good idea to Clearbit 3 as well because you could be moving the knob from WIND to TKGS instead of TEST to TKGS?)

OR maybe easier – maybe it would be better to do the Clearbit in the FSUIPC Buttons page, ie for TEST I would set button ON as the PMDG Control + Parameter and for button RELEASE I would set Clearbit 0

Charles

This post was modified 3 days ago by skythelimit