how to create conditional commands

[tekstyle]

i am no programmer nor engineer. I have been looking at this page to learn how to write some code for my machine. https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands#Section_Variables_and_Macro_Parameters.

I have 1 simple IF command that I use right now courtesy of someone's help but I just don't understand how I would know what nomenclature or syntax to use that duet will understand.

for example:
{heat.heaters[1].current < 150}.
How do you guys know to use heat.heaters[1].current? I know the number [1] stands for the heater number in series but what about heat.heaters?

if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
how do you know to use !move.axes[0]. homed?

i guess what i want to know is is there is like a list of naming convention that duet will understand and if there is one available to draw from.

[cosmowave]

@tekstyle
you can use the object model browser plug in.
there you see all possible variables of your system!

[tekstyle]

@cosmowave
how do i do that?

[cosmowave]

@tekstyle
which FW are you using?

[tekstyle]

@cosmowave

duet2 RRF3.1.1 I think it is.

[Phaedrux]

You'll need to update to 3.2.2 firmware and DWC at least.

https://github.com/Duet3D/RepRapFirmware/releases/download/3.2.2/Duet2and3Firmware-3.2.2.zip

[tekstyle]

@phaedrux

i just got done updating to 3.2.2. i enabled object modelling but where do I see the variables and in what way I can use them?

[Phaedrux]

Sorry, my mistake. Variables is part of the 3.3 beta release. RC3 is available now. Final release soon. https://github.com/Duet3D/RepRapFirmware/releases/tag/3.3RC3

Even so, there are no pre-defined variables. You would define them yourself and use them with your conditional gcode as described in the link you included in your first post.

[tekstyle]

@phaedrux
can you see if this is a valid command?
I want hotend to turn off if print pause due to heater fault. but I want hotend to hold current temperature last commanded based on what's inside the pause.g file (either it be active or standby temp), if the print pauses for any other reason.

I am still learning what to enter for {xxx.xxx[#].xxx} or if it is even entered correctly. all these coding is foreign to me.

Also, where would I put this line of code? in config.g or at the end of the pause.g

while {state.status.value == "paused"} ;if status is "paused"
(indent) if {heaters[1].state = "fault"} ; and if heater 1 has heater fault
(indent) M104 H1 S{heat.heaters[1].0] ; set Heater 1 to 0C
else {state.status.value == "paused"} ;if status is "paused"
(indent) if {heaters[1].state != "fault"} ; and if heater 1 has no heater fault
(indent) M104 H1 S{heat.heaters[1].current] ; set Heater 1 to current

[Fabmonkey]

@tekstyleI know this is an old post, but I was searching for the same thing today and found the answer here :

https://github.com/Duet3D/RepRapFirmware/wiki/Object-Model-Documentation