Codesys 3.5 - Program exception

CODESYS
1

Hi all,

strange question - but does anyone know how to make a program that will create an exception and stop the PLC?
I’ve encountered this and would like to recreate this to be able to test some communication settings.

2

Hello bjornidar,

you will find various options in the following video.

2 Likes
3

I use a division by zero.
var = 1 / 0;

2 Likes
4

You can use this to create your own exception and stop the PLC:

Variable declaration:

// Add CmpApp.library, SysExcept.library and SysTypes2_Itf as newest.
VAR
	_pApp	: POINTER TO CmpApp.APPLICATION;
	_result	: SysTypes.RTS_IEC_RESULT;
END_VAR

Code:

_pApp := AppGetCurrent(pResult:=_result);
IF _pApp <> 0 THEN
	// Modify the RtsExceptions.[xxx] to match what exception your want to throw.
	AppGenerateException(pApp:=_pApp, ulException:=RtsExceptions.RTSEXCPT_ARRAYBOUNDS);
END_IF
5

Thanks for all the feedback!
I’ve now been able to address the issues I had when the PLC went to exception.

Now to the root cause of this investigation, has anyone any experience with a similar exception like the one below?
Which seems to have happened at the same time as a user logged out of the Visu.

Oct 28 19:23:08 localhost codesys3: IECVisualization DEBUG Visu_PRG: Creating Client for Extern-ID: 2085154864
Oct 28 19:23:08 localhost codesys3: IECVisualization DEBUG Visu_PRG: Creating Client successful for Extern-ID: 2085154864 Returned IEC-ID: 0
Oct 28 19:24:00 localhost codesys3: CmpUserMgr DEBUG Login (4)
Oct 28 19:24:00 localhost codesys3: CmpDevice DEBUG Device Login from 0002 successful
Oct 28 19:24:00 localhost codesys3: CmpUserMgr DEBUG Login (4)
Oct 28 19:24:00 localhost codesys3: CmpDevice DEBUG Device Login from 0002 successful
Oct 28 19:24:00 localhost codesys3: IECVisualization DEBUG Visu_PRG: Creating Client for Extern-ID: 2171002870
Oct 28 19:24:00 localhost codesys3: IECVisualization DEBUG Visu_PRG: Creating Client successful for Extern-ID: 2171002870 Returned IEC-ID: 2
Oct 28 19:26:53 localhost codesys3: IECVisualization DEBUG VisuFbFrameBase.SetInputPositionData: The element id for the input position cannot be determined
Oct 28 19:26:57 localhost codesys3[879]: Last message 'IECVisualization DEB' repeated 1 times, suppressed by syslog-ng on EC752-23C001-PLC.localdomain.lan
Oct 28 21:28:33 localhost codesys3: CmpUserMgr DEBUG Logout (3)
Oct 28 21:28:33 localhost codesys3: CmpUserMgr DEBUG Logout (2)
Oct 28 21:28:33 localhost codesys3: IECVisualization DEBUG Visu_PRG: Successfully Removed Client with IEC-ID: 0, Extern-ID: 2085154864
Oct 28 21:28:33 localhost codesys3: SysExcept EXCEPTION runtime received SIGABRT - system may be in an inconsistent state

**** We recommend a reboot of the controller now! ****
Oct 28 21:28:33 localhost codesys3: TscWagoStatusProvider DEBUG Controller State Changed RUN -> EXCEPTION
Oct 28 21:28:33 localhost codesys3: CmpIecTask EXCEPTION *EXCEPTION* [<excpt>NonContinuable</excpt>] occurred: App=[<app>Application</app>], Task=[<task>VISU_TASK</task>]
Oct 28 21:28:33 localhost codesys3: CmpIecTask EXCEPTION *EXCEPTION POSITION*: IP=<ip>0x(nil)</ip> (no IEC context could be retrieved)
Oct 28 21:28:40 localhost codesys3: CmpUserMgr DEBUG Logout (1)
Oct 28 22:20:46 localhost codesys3: CmpApp DEBUG App [Application] Start successful
Oct 28 22:20:52 localhost codesys3: CmpApp DEBUG App [Application] Start successful
Oct 28 22:21:00 localhost codesys3[879]: Last message 'CmpApp DEBUG App [Ap' repeated 1 times, suppressed by syslog-ng on EC752-23C001-PLC.localdomain.lan
Oct 28 22:21:27 localhost codesys3: CmpApp DEBUG App [Application] Logout successful
type or paste code here
6

I think this is more for the Technical Support at WAGO.

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