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[Solved] Flybywire A320 lvars

Posts: 7

a320fly

Registered

Topic starter

March 9, 2026 11:51 am

(@a320fly)

Joined: 4 weeks ago

Hello, I want to controll some buttons with a joystick.

In the FSUIPC7.INI is this entry: 634=PA,0,CIA32NX_FCU_EFIS_L_EFIS_RANGE,2.000000 -{Input Event}-

In the FSUIPC.LOG I get this message: [Buttons] 634=PA,0,CIA32NX_FCU_EFIS_L_EFIS_RANGE,2.000000
**** Cannot execute empty Input Event

The documentation said: A32NX_FCU_EFIS_{side}_EFIS_RANGE // Value >2< Meaning >40< // side >L< left

What's the correct value in the INI-file? Thanks for your help.

Regards

Bernd

2 Replies

Posts: 236

FSUIPC

Admin

March 9, 2026 12:14 pm

(@fsuipc)

Joined: 8 months ago

A32NX_FCU_EFIS_L_EFIS_RANGE is an lvar, not an input event. Why is it assigned as an Input Event? Did you create that entry manually?

There are various ways to assign a button/key to change or set an lvar. The easiest way is to use a preset. Looking at that lvar, there are already several MF presets defined to control this lvar:

A32NX_EFIS_L_ND_RANGE_10#0 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_160#4 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_20#1 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_320#5 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_40#2 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_80#3 (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_DEC#(L:A32NX_FCU_EFIS_L_EFIS_RANGE) -- 0 max (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)
A32NX_EFIS_L_ND_RANGE_INC#(L:A32NX_FCU_EFIS_L_EFIS_RANGE) ++ 5 min (>L:A32NX_FCU_EFIS_L_EFIS_RANGE)

So, use the UI to assign that button to preset A32NX_EFIS_L_ND_RANGE_40 to set the lvar to a value of 2. Check the Select for Preset checkbox, click the Find Preset... button, and navigate to MobiFlight->Fly By Wire->As320-Dev->EFIS to find the preset.

Regards,

John