Qualifying HAL conditions to avoid error dialogs at startup

Are there guidelines somewhere on how to "qualify" some hal conditions to avoid error dialogs?

Recently, I was occasionally triggering startup errors when I enabled quad errors with:

setp hm2_7i92.0.encoder.03.quad-error-enable true

PCW's suggestion to use halui.machine.is−on works for bit values.

net signal_name <= halui.machine.is−on => hm2_7i92.0.encoder.03.quad-error-enable

I have been updating the Simple Remote Pendant for 2.8 and sometimes see the error dialog when the config starts up. What's the best way to qualify/gate signals like the analog jog values(halui.joint.0.analog )? Do you run each signal through a mux2 controlled by machine.is-on? Do the halui.axis.L.analog pins also need to be protected?

halui.joint.0.analog halui.axis.x.analog

I inserted some mux2 components and used machine-on to select between 0.0 and the jog-analog signals. This cleared up the jog error dialogs I was occasionally seeing when axis starts.

If there is a better method please let me know.

Lathe XZ joypad jog



Mill XYZ joypad jog

The mux cleans up the error dialogs at startup, but then I was getting error dialogs when halui turns the machine off. (and probably on e-stop) I get two EMC_JOG_STOP errors every time I go from machine-on to off. So I was getting a EMC_JOG_STOP as each axis or joint changes from whatever small float the joysticks produce to exactly 0.0 when the mux switches.



Searching the forum, I found one of Andy's 2013 messages about using a mux as a sample-hold. With this change, all is well. I will update the wiki Simple Remote Pendant to reflect this.

@jtrantow
Have a look at this configuration, similar to yours with few more clues:
softsolder.com/2010/10/23/logitech-gamep...for-the-joggy-thing/

The HAL-Configuration with Eagle looks nice. Does that work with 2.8?

Likewise, the extra jogging features (lock out and change speed with the button) look nice.

The example you linked to looks pre-2.8. I don't see anything that guards against the joint jog-speed changing when in e-stop or off???