Post by mogam on Internal error:System.NullReferenceException: The object reference was not set to an object instance. ^{CODESYS Forge talk (Post)}
Hi everyone, I have a my App that reads values from a shared memory than 2 variables x,y were calculated. here as you can see in my code: PROGRAM PLC_PRG VAR szName : STRING := '/SM'; ( Name of the shared memory.) uxiSize : __UXINT := 646 * 2 * SIZEOF(REAL); ( Size of the shared memory. ) hShm : RTS_IEC_HANDLE; ( Handle to the shared memory ) pStart : POINTER TO REAL; ( Pointer to the first element in the memory ) pData : POINTER TO REAL; ( Pointer, which is incremented until the last sign in the memory is reached. ) shared_data :ARRAY[0..645, 0..1] OF REAL; velocity : ARRAY[0..2] OF REAL; ( Velocity array ) position : ARRAY[0..2] OF REAL; ( Position array ) angleDepth : ARRAY[0..645, 0..1] OF REAL; ( Angle and depth array ) xEndOfMemory : BOOL; x : ARRAY[0..645] OF REAL := 1.0; y : ARRAY[0..645] OF REAL := 1.0; (* Result of actions at the memory. *) OpenResult : RTS_IEC_RESULT; ReadResult : RTS_IEC_RESULT; PointerResult : RTS_IEC_RESULT; DeleteResult : RTS_IEC_RESULT; CloseResult : RTS_IEC_RESULT; i : INT; END_VAR ( Open the shared memory ) hShm := SysSharedMemoryOpen2(szName, 0, ADR(uxiSize), ADR(OpenResult)); IF hShm <> RTS_INVALID_HANDLE THEN (* Read the entire shared memory table *) SysSharedMemoryRead(hShm:= hShm, ulOffset:= 0, pbyData:= ADR(shared_data), ulSize:= uxiSize, pResult:= ADR(ReadResult)); (* Fetch the pointer from the shared memory. The pointer is pointing to the first element address *) //pStart := SysSharedMemoryGetPointer(hShm, ADR(PointerResult)); (* Close the shared memory *) //CloseResult := SysSharedMemoryClose(hShm := hShm); (* Read velocity and position data from the shared memory *) FOR i := 0 TO 2 DO velocity[i] := shared_data[i, 0]; position[i] := shared_data[i, 1]; END_FOR; (* Read angle and depth data from the shared memory *) FOR i := 0 TO 645 DO angleDepth[i, 0] := shared_data[(i + 6), 0]; angleDepth[i, 1] := shared_data[(i + 6), 1]; END_FOR; FOR i := 0 TO 645 DO x[i] := angleDepth[i, 1]*COS(angleDepth[i, 0]); y[i] := angleDepth[i, 1]*SIN(angleDepth[i, 0]); END_FOR; END_IF For these values an XY-CHART needs to be done and when i create a visualisation and set the x data and y data when i try to compile, i recieve this error: ------ Übersetzungslauf gestartet: Applikation: Device.Read_App ------- Code typisieren ... [FEHLER] Internal error:System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt. bei _3S.CoDeSys.LanguageModelManager.LDateType.Accept(ITypeVisitor typvis) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
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(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
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(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
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(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..
(_IArrayType ) bei ..
(_IPointerType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..
(_IPointerType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..(String ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..(String ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..(String ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..
(_IPointerType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..(String ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..(String ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
( ) bei ..
(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei ..
(_ISignature , _IPreCompileContext ) bei ..
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(String ) bei ..
(String , IVariable[]& , ISignature[]& ) bei ..
(String , IVariable[]& , ISignature[]& , IScope& ) bei ..visit(_IVariableExpression , AccessFlag ) bei ..
(_IUserdefType ) bei ..(_IVariable , IScope5 , _ICompileContext , _ISignature ) bei ..(_ISignature , IScope5 , _ICompileContext ) bei _3S.CoDeSys.Compiler35140.Compiler.
(_ICompileContext , _IPreCompileContext , _ICompileContext , IProgressCallback ) bei _3S.CoDeSys.Compiler35140.Compiler.
(_ICompileContext , Boolean , Boolean , _IPreCompileContext , _IPreCompileContext , _ICompileContext , Boolean , Boolean& , IProgressCallback ) bei _3S.CoDeSys.Compiler35140.Compiler.
(Guid , Boolean , Boolean , Boolean , Boolean& , _ICompileContext& , _ICompileContext& , IProgressCallback , Boolean , Boolean ) Kompilierung abgeschlossen -- 1 Fehler, 0 Warnungen Übersetzung abgeschlossen -- 1 Fehler, 0 Warnungen : Kein Download möglich!
Last updated: 2024-05-24

Post by andrax on Variable Length Array - Cannot mix variable and fixed length dimensions? ^{CODESYS Forge talk (Post)}
Arrays with variable lengths are a bad idea. This makes your system unstable and can lead to crashes. Declare your array large enough to reserve enough memory
Last updated: 2025-05-24

Post by xabier on Remove white spaces in file .txt ^{CODESYS Forge talk (Post)}
Hi, I want write a array with line break in file.txt (I attacehd the screen array) and when i check the file appear with white spaces (I attached file .txt ) Somepeople know how remove this white spaces?? Thanks you Regars XABI
Last updated: 2024-04-22

Post by comingback4u on Memory Address Overlap ^{CODESYS Forge talk (Post)}
Hello, We use a controller that comes with a bunch of predefined faults. These faults are considered active and historic. They are a 32 byte array but only take up 26 bytes of data. Because of this the historic faults start at address 26 instead of 31. Active faults variable take up address location 0 to 31. Historic faults variable take up address location 26 to 57. Because of this overlap I get an error that these overlap and it wont allow me to download to my controller. This isn't an issue in 3.5.5.4 but becomes an issue in newer version. Is there a way to turn this off? If I change the address location, the historic faults then become broken without doing some manipulation in the code. The software will build just fine. Thank you for your time.
Last updated: 2024-03-07

Post by youness on No source code available (cip object) ^{CODESYS Forge talk (Post)}
Hi yotaro, hope your problem was resolved. I had the same, but with an other library title. This exception is not detected during compilation, but rather at a given position in the program (when switching to a given visualization). Although the exception is generated at this point, it does not involve the visualization in question. This error is due to one of 3 reasons: 1) A division by zero somewhere: The program is able to detect divisions by zero at compile time. But in the case of a variable, which takes a valid value at init and changes to 0 at a later stage. 2) An invalid pointer: (either because it has a value of 0, or because it points outside the memory reserved for the program) is being dereferenced. Locate any pointers or interfaces you have in the code and check them - you should also be wary of mixing inline modifications and pointers. 3) Array overflow: Generally when a processing operation is executed outside the array's definition range. Example: a write loop with n iterations is executed on an array of dimmension n-1. On the other hand, the error message may not appear. In the latter case, the error may have fatal consequences, as the overflow has induced writing to potentially forbidden memory areas. This problem can be explained by the fact that it's not always the adjacent memory areas of PLC_PRG that are overwritten, but the memory areas that are randomly allocated to the array during compilation. In this case, however, there is no entry in the log, so you need to integrate the "Implicit Check function", which checks the line of code generating the error. To integrate this functions, click on Application --> POU for implicit controls Regards,
Last updated: 2024-07-16

Get the list of all languages from TextList or from font settings of visualmanager ^{CODESYS Forge talk (Thread)}
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Changed Device of Rapberry Pi to MC SL instead of standard SL and cannot connect anymore ^{CODESYS Forge talk (Thread)}
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how to get a list of the cross reference of one variable ^{CODESYS Forge talk (Thread)}
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What is the meaning of colored symbols leftside of each device ? ^{CODESYS Forge talk (Thread)}
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call of a method of a function block in another program ^{CODESYS Forge talk (Thread)}
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call of a method of a function block in another program ^{CODESYS Forge talk (Thread)}
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Last updated: 2024-06-03

Post by dkugler on Webvisu client connection monitoring ^{CODESYS Forge talk (Post)}
you can give this code snippet a try. It's extracted and simplyfied from my code: Install VisuElemBase lib if not installed yet. Execute in visu task: VAR pClientData : ARRAY [-1..100] OF POINTER TO VisuElemBase.VisuStructClientData; END_VAR VisuElemBase.g_ClientManager.BeginIteration(); pClientData := VisuElemBase.g_ClientManager.GetNextClient(); WHILE pClientData <> 0 DO pClientData[pClientData^.GlobalData.GlobalClientID] := pClientData; END_WHILE You have to make shure every no longer updated pointers in the array have to be deleted and no longer used by your code! Usage of this pointer access at your own risk :-) Works with SP16. From SP17 and newer there will be warnigs etc. using this solution as I remember. It will be great, if Codesys publishes a example or give a hint how to accesse this client values with the VisuUtil lib or other future-proof way!
Last updated: 2024-09-09

Post by jampid on Struct Literal ^{CODESYS Forge talk (Post)}
Bonjour Davidmic, Il n'est pas possible d'associer une méthode à une fonction. Cela est possible sur les Blocs fonctions. En utilisant ta DUT MyStruct, je créé une fonction avec en entrée un tableau de structure :** FUNCTION F_F3 : REAL VAR_IN_OUT // bien définir un type IN_OUT IN_ptrINT: ARRAY[*] OF MyStruct; // la taille sera définie ultérieurement/ END_VAR VAR _di: DINT; // Index de parcours du tableau pour l'écriture dans les cases ENDVAR ============== //Programme F_F3: FOR _di := LOWER_BOUND(IN_ptrINT,1) TO UPPER_BOUND(IN_ptrINT,1) DO IN_ptrINT[_di].som:=IN_ptrINT[_di].a + IN_ptrINT[_di].b; END_FOR J'utilise ensuite cette fonction dans un POU Programme : PROGRAM Test_F_Fx VAR _aiTAB9:ARRAY[0..3] OF MyStruct := [(a := 1, b := 1.2), (a := 2, b := 2.2), (a := 3, b := 3.3), (a := 4, b := 4.4)]; END_VAR ** ==========** F_F3(IN_ptrINT:=_aiTAB9 ); Voilà l'idée pour avancer. Une autre idée, est d'utiliser les pointeurs ou les références. Bon développement!
Last updated: 2025-04-07

Post by paro on Modbus Client Request Not Processed ^{CODESYS Forge talk (Post)}
Hi, works in my case if I increase the timeout! to_udint(t#100ms) -> 100 -> 100us.. FUNCTION_BLOCK MODBUS_master_example_ST VAR initDone : BOOL := FALSE; aIPAddress : ARRAY [0..3] OF BYTE := [127,0,0,1]; clientTcp: ModbusFB.ClientTcp; // buffer to read input registers aDataInputRegisters : ARRAY[0..9] OF UINT; // some client requests clientRequestReadInputRegisters: ModbusFB.ClientRequestReadInputRegisters; xExecute: BOOL; uistart: UINT := 100; udiTimeout1: UDINT; END_VAR IF NOT initDone THEN initDone := TRUE; // configure clientTcp clientTcp(aIPaddr:=aIPAddress, uiPort:=502, udiLogOptions := ModbusFB.LoggingOptions.All); // configure clientRequestReadInputRegisters clientRequestReadInputRegisters(rClient:=clientTcp, uiUnitId:=1, udiTimeout:=1000000); // 1sec END_IF // call the client FB's clientTcp(); clientRequestReadInputRegisters(rClient:=clientTcp,xExecute := xExecute AND NOT clientRequestReadInputRegisters.xBusy ,uiStartItem:=uistart, uiQuantity:=3, pData:=ADR(aDataInputRegisters[0]));
Last updated: 2024-05-30

Post by zer0g on Modbus Client Request Not Processed ^{CODESYS Forge talk (Post)}
I'm using the code bellow which is based on the Codesys example: FUNCTION_BLOCK MODBUS_master_example_ST VAR initDone : BOOL := FALSE; aIPAddress : ARRAY [0..3] OF BYTE := [127,0,0,1]; clientTcp: ModbusFB.ClientTcp; // buffer to read input registers aDataInputRegisters : ARRAY[0..9] OF UINT; // some client requests clientRequestReadInputRegisters: ModbusFB.ClientRequestReadInputRegisters; xExecute: BOOL; END_VAR IF NOT initDone THEN initDone := TRUE; // configure clientTcp clientTcp(aIPaddr:=aIPAddress, uiPort:=502, udiLogOptions := ModbusFB.LoggingOptions.All); // configure clientRequestReadInputRegisters clientRequestReadInputRegisters(rClient:=clientTcp, uiUnitId:=1, udiTimeout:=TO_UDINT(T#1000MS)); END_IF // call the client FB's clientTcp(); clientRequestReadInputRegisters(rClient:=clientTcp,xExecute := xExecute AND NOT clientRequestReadInputRegisters.xBusy ,uiStartItem:=2, uiQuantity:=3, pData:=ADR(aDataInputRegisters[0])); As you can see the clientTCP is called cyclically with the same result.
Last updated: 2024-05-30

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