Preparation for the self-construction of a carousel changer

So I have now tested this with the 9 axis sim in 2.9 and if I leave out U in the geometry in [DISPLAY] the simulation does not move.
With a finished axis sim in 2.8 I can omit the U in the geometry and then the simulation moves in X anyway.

Then I made a sim based on Stepconf as XYZA and changed the A to U and lo and behold:
If the letter U is left out in the geometry, it does not move either!!!

Apparently there is a problem with the 2.8 in conjunction with a finished sim.

Thanks for the impetus to test it again in detail!
Many thanks

Then I can continue

 

No, as far as I can see, the pin is already connected.
Attached is the "hal file"

small update,

I have finished building my carousel so far.
The U Axis is mounted on it sits the carousel with geneva wheel
  which is retracted and extended by a cylinder.
I have 12 pockets each equipped with 4 screw heads so that the pocket can be clearly assigned.
So like this:
0001
0011
0111
etc ...
Is the coding called gray? Is the example below a useful example for my project?

loadrt carousel pockets=10 dir=1 encoding=gray num_sense=4
#loadrt conv_float_s32 (Already loaded in sim_vmc.hal)
addf carousel.0 servo-thread
addf conv-float-s32.2 servo-thread # G-code analogue outputs are float-type

setp carousel.0.fwd-dc 0.002
net car-enable motion.digital-out-00 carousel.0.enable
net car-ready carousel.0.ready motion.digital-in-00
net car-vel carousel.0.motor-vel
net car-pos-req motion.analog-out-00 conv-float-s32.2.in
net car-pos-s32 conv-float-s32.2.out carousel.0.pocket-number
net bit0 carousel.0.sense-0
net bit1 carousel.0.sense-1
net bit2 carousel.0.sense-2
net bit3 carousel.0.sense-3

net car-lock motion.digital-out-01
net car-locked motion.digital-in-01

net arm-act motion.digital-out-02
net arm-in motion.digital-in-02
net arm-out motion.digital-in-04

net tool-release motion.digital-out-03
net tool-released motion.digital-in-03

net tool-prep-loop iocontrol.0.tool-prepare iocontrol.0.tool-prepared
net tool-change-loop iocontrol.0.tool-change iocontrol.0.tool-changed

 

Thanks Andy for the info!

I have this driver with motor:

 

 

I can control the speed with the potentiometer on the driver, unfortunately the adjustment is very difficult with it. How can I control the speed with my 7i76e if I already use all 5 axes? A very small speed is enough for me since this is the motor for my Geneva wheel.
Keyword PWM, but with which pin could this go? maybe an analog output .....
or am I on the wrong track there?
 

Yes currently I regulate the speed with the potentiometer on the driver, but this is, in my opinion, not fine enough for a low speed.
The on and off I do with a relay on the enable.

I still have this description:

=15pxSpeed regulation choice(RV ; AVI)
1. Setup speed by potentiometer (RV).The dipswitch SW2 must be ON status to enable this function.
CW rotate the potentiometer will increase speed. CCW- speed down.
2. Setup speed by analog input (AVI). The dipswitch SW2 must be OFF status to enable this
function.。AVI terminal accept 0～5V voltage or PWM signal from controller。AVI terminal with input
resistance of 100K，current consumption≤5mA。
Reference table
S W 2 Command to
Speed adjust Comman Current
O N RV CW—speed up，CCW—speed down － －
O F F AVI 0～5V analog input 0～5V volage ≤5mA
O F F AVI PWM 1KHz duty cycle －

Only one of above two modes can be used to adjust speed (another mode shall be enabled).
Once AVI terminal applied, (RV) potentiometer shall be CCW turned to Min. position。PWM signal are 5V TTL leve