Good morning,

I'm pretty new to codesys and the programming side of raspberry.

I'm trying to power off my raspberry using my HMI.
I've found some other examples, but I couldnt get them to work:

l viewtopic.php?t=8638 l - Keep getting syntax errors
l viewtopic.php?f=21&t=5714 l - No errors, it just doesnt power off

I'm using ladder logic to program the raspberry.

Can somebody explain how to do it?

http://forum.codesys.com/viewtopic.php?f=23&t=6247&p=12699#p12699

I use this:

PROGRAM power
VAR
   Result: UDINT;
END_VAR
IF GlobalVariables.resetFromVISU THEN
   GlobalVariables.power_led := FALSE;
   _ (pszComand:='sudo reboot' , pResult:= ADR(Result));
END_IF
IF GlobalVariables.poweroffFromVISU THEN
   GlobalVariables.power_led := FALSE;
   _ (pszComand:='sudo poweroff' , pResult:= ADR(Result));
END_IF

and

[SysProcess]
Command=AllowAll

in CODESYSControl_User.cfg file
I hope this will help.

When I write in code syntax SysProcess_Execute_Command after submit I see only "_" why?

pawel3410 hat geschrieben:
http://forum.codesys.com/viewtopic.php?f=23&t=6247&p=12699#p12699
I use this:

PROGRAM power
VAR
   Result: UDINT;
END_VAR
IF GlobalVariables.resetFromVISU THEN
   GlobalVariables.power_led := FALSE;
   _ (pszComand:='sudo reboot' , pResult:= ADR(Result));
END_IF
IF GlobalVariables.poweroffFromVISU THEN
   GlobalVariables.power_led := FALSE;
   _ (pszComand:='sudo poweroff' , pResult:= ADR(Result));
END_IF

and

[SysProcess]
Command=AllowAll

in CODESYSControl_User.cfg file
I hope this will help.
When I write in code syntax SysProcess_Execute_Command after submit I see only "_" why?

I've got it all working now.

Thank you for your help!

For me this does not work. I think my Raspberry Pi does restart, but not Codesys. I even cannot access the Pi via ssh or other remote communication protocols! I have to reconfigure the SD card of the Pi that it works again.

I use this command and SysProcess is as above:

SysProcess.SysProcessExecuteCommand2(pszCommand:='sudo reboot', pszStdOut:=stdout, udiStdOutLen:=31 , pResult:=0 );

remove the sudo!