New error No control?? 5i25 7i77 Over Voltage!

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29 Aug 2020 00:43 #179895 by eighthaxis
Iltereally changed nothing on the machine since it was last running fine and now I have a new error:
hm2/hm2_5i25.0: Smart serial card hm2_5i25.0.7i77.0.1 error = (28) Over
> Voltage

I am unable to turn on the machine. Halmeter doesn't seem to read the actual values going to the inputs.
If I hit e-stop on gmocappy it says it : Error: External ESTOP is set, could not change state.
I checked that all power supply voltages were proper and all was good.
Checked if any inputs were reading high voltages and found nothing.
Would this possibly be the Desktop PC's power supply voltage is too high.
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29 Aug 2020 01:25 #179897 by PCW
That error would indicate that the 7I77s field voltage was too high

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29 Aug 2020 01:32 #179898 by eighthaxis
Field voltage is the same as it has always been.
4.88 and
23.99

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29 Aug 2020 01:40 #179899 by PCW
OK well for some reason the field I/O section of the 7I77 thinks the field
voltage is too high. Is it possible there is some debris or contamination
on the 7I77?

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29 Aug 2020 04:10 #179909 by eighthaxis
I will look very closely tomorrow and be sure to blow it off.
Thanks for your help.

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29 Aug 2020 08:56 #179922 by newbynobi
May be I am crazy, but I had a very similar problem on my laptop.
After I did a uname -a I realized, that my laptop did an update and it started with a non real time kernel.

Could you please check if you are running a preempt kernel?

Norbert

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29 Aug 2020 16:25 #179942 by eighthaxis
Thanks for your input Norbert.
Please excuse my ignorance of Linux but could you please give me a procedure to check if I am running a preempt kernel?
I did spend a little time trying to find out how but came back empty handed.
Also I will try updating Linuxcnc today as well as I still don't have all of the jog buttons on gmocappy.

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29 Aug 2020 16:33 #179943 by Clive S

Thanks for your input Norbert.
Please excuse my ignorance of Linux but could you please give me a procedure to check if I am running a preempt kernel?
I did spend a little time trying to find out how but came back empty handed.
Also I will try updating Linuxcnc today as well as I still don't have all of the jog buttons on gmocappy.


open a terminal and type uname -a

this should report back with what you are running and have RT in there

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31 Aug 2020 17:12 #180191 by eighthaxis
This is what it said:
josh@Bostomatic:~$ uname -a
Linux Bostomatic 4.9.0-13-rt-amd64 #1 SMP PREEMPT RT Debian 4.9.228-1 (2020-07-05) x86_64 GNU/Linux
josh@Bostomatic:~$

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31 Aug 2020 17:58 #180199 by tommylight
That is all good.
Can you measure the AC voltage on the 7i77 24V connector, then between + and - on that same connector and the machine GND for both AC and DC?

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