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Opencockpits MSFS2020 PMDG FSUIPC

Driver738 · 2026-01-12T20:06:19Z

Hi Guys. I have managed to bring back to life 3 (ancient!) pedestal OC modules, COMM, NAV, and ATC Transponder. With FSUIPC, COMM and NAV work great, no tweaking required. The ATC module works fine on any adjust of the main rotary encoder, to change the squawk code. However when physically changing the other Encoder for Stby/Off/Xpndr/Ta/Ta/Ra the change is not reflected in the sim, on the PMDG pedestal, it does not move. I'm no expert but FSUIPC logging sees some kind of event when the hardware encoder is turned: 8098641 *** EVENT: Cntrl= 65715 (0x000100b3), Param= 512 (0x00000200) XPNDR_SET Any ideas if we can get this encoder working? Apologies if this turns out to be an Opencockpits issue. ( I know before I rebuilt the sim, this did work ok previously, a few moons back..).

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Posts: 4

Driver738

Registered

Topic starter

January 13, 2026 2:53 pm

(@driver738)

Joined: 2 months ago

Posted by: @fsuipc
↑
How have you assigned this rotary? As I said, for this you need to use the PMDG custom control. See the FAQ entries on using PMDG custom controls.

Will Do!

Posted by: @fsuipc
↑
But the transponder module does seem to be working, in that when you turn the rotaries they are updating the values in the VC displays.

Yes, except the Rotary selector for STBY - ALT RPTG - OFF - TA - TA.RA

Posted by: @fsuipc
↑
So is this device being detected and assigned automatically in MSFS?

Yes, though it also needs its own program IOCModule. exe, to be runing along with the Sim.

Posted by: @fsuipc
↑
Does FSUIPC see this device? i.e. when you turn the selector switch, does FSUIPC recognise the buttons? If so, you can try unassigning in MSFS and assigning in FSUIPC.

Will check this

Posted by: @fsuipc
↑
FSUIPC is just logging the events seen in the FS – I do not know where this event is originating. Can you attach a log and ini file so that I can see what is happening please. Activate logging for Buttons & Keys and Events.

Ok I'll do this. Many thanks!

This post was modified 2 months ago 2 times by Driver738

Posts: 215

FSUIPC

Admin

January 13, 2026 3:54 pm

(@fsuipc)

Joined: 7 months ago

Posted by: @driver738
↑
Yes, except the Rotary selector for STBY – ALT RPTG – OFF – TA – TA.RA

Posted by: @fsuipc
↑
So is this device being detected and assigned automatically in MSFS?
Yes, though it also needs its own program IOCModule. exe, to be runing along with the Sim.

Ok, so it is the assignment to the selector knob in MSFS that is not correct. I don't think it is possible to use the PMDG custom controls with MSFS assignments. Or maybe check if anything can be configured in the IOCModule to change the assignments there.

If FSUIPC recognises this device and switch, you can try assigning it in FSUIPC. But as this is an OC device, I would have thought that you would need to use SIOC to assign this, and the assignment would use FSUIPC offset 0x3110 to actually send the custom control.

John

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