My hardware configuration:
-Argon
-Small Mige
-STM32F4DISCOVERY board
Problems arise when:
-all of a sudden between two restarts, no phasing when powering on. Connecting to granity, there is no voltage, faults read undervoltage, LD3 SL error (undervoltage)
Controller works, I have input working but no drive to the servo
How it behaves:
-no drive, no phasing
Granity faults:
Fault as shown
SMT top right LED flashes red
You use 2 psu ? Can you show all tabs from granity ?
HV bus voltage seems low. Do you hear one or two relay clicks from Argon when you power-on the system?
I hear one loud click from the Argon.
Tomorrow I’ll check if the power gets to the Argon at all. I don’t have a multimeter at hand tonight.
My best hope for now is that it’s the fuse of the power input.
Sorry that’s what i meant , one psu from argon and what is the second one.
MW RS 25-24:
https://www.meanwell-web.com/en-gb/ac-dc-single-output-enclosed-power-supply-output-rs--25--24
Look at GD wiki about R7 resistor issue on Argon, I suspect this could be your problem perhaps.
Also check if the output of the logic 24V psu is fine…it should be, but make sure anyway.
Cheers,
Beano
Alright, after attacking it with a multimeter, the R7 resistor doesn’t give resistance, can it be that, then? Shouldn’t be a nightmare to replace if so.
Yep, that’s the one…
Thank you, replaced the resistor and it’s back to working. Good job on the fast diagnosis.
You’re welcome 
Happy days for you!
