Changing acceleration values during runtime

Is it possible to change the acceleration values of single axis during runtime? I would like to have GUI elements for all axes where I can temporarily limit the acceleration values. I found I can read out the the [TRAJ] DEFAULT_ACCELERATION, but no function to write an acceleration value.

Cheers,
Shu

Sort of. I know you can change it while Linuxcnc is open. But I'm not sure it works (at least not in real time) while running a G-code file (in auto mode).
The pins ini.N.max_acceleration can be used to change the acceleration for each joint.

Does these pins have any effect?
ini.traj_default_acceleration - (float, in) [TRAJ]DEFAULT_ACCELERATION
ini.traj_default_velocity - (float, in) [TRAJ]DEFAULT_VELOCITY
ini.traj_max_acceleration - (float, in) [TRAJ]MAX_ACCELERATION

Default/max_acceleration always show 1e+99, Default/max_velocity show correct but change all of them dont have any effect when i jog or run auto program.

I'm using lcnc 2.8

limiting the Speed Max value also takes effect on the ACC values
so you might consider to limit that in first hand
this is by halui