Post by alessandro on SysMemCmp SysMemCpy ^{CODESYS Forge talk (Post)}
VAR Data1:ARRAY[1..10] OF SINT ; Data2:ARRAY[1..10] OF SINT ; Data3:ARRAY[1..10] OF SINT ; Data4:ARRAY[1..10] OF SINT ; ex_1 : BOOL ; ex_2 : BOOL ; enable : BOOL :=0 ; END_VAR // PROGRAM // The scope of this example is compare and copy the values of two ARRAY only if some value is different using SysMemCmp and SysMemCpy. // In this 2 example we don't use a FOR cicle for do this, and pBuffer1 and pBuffer2 is just a pointer to ARRAY. See details in Library util.SysMem of Codesys // The compare funcion util.SysMem.SysMemCmp is bidirectional if Data1 chanege respect Data2 ex_1 go to 1 and if Data2 change respect Data1 also // but the copy function util.SysMem.SysMemCpy work only from source ARRAY pSrc:=ADR(Data1) to destination ARRAY pDest:=ADR(Data2) // Example 1 Full ARRAY compare and copy // This compare 2 different equal ARRAY and if there is some difference ex_1 go to 1 and if you give enable he copy Data1 in Data2 ex_1 := TO_BOOL(util.SysMem.SysMemCmp(pBuffer1:=ADR(Data1), pBuffer2:=ADR(Data2), udiCount:=SIZEOF(Data1))); IF ex_1 AND enable THEN util.SysMem.SysMemCpy(pDest:=ADR(Data2), pSrc:=ADR(Data1), udiCount:=SIZEOF(Data1)); END_IF // Example 2 Only selected area of the ARRAY compare and copy // This compare 2 different equal ARRAY starting from position number [3] for 4 byte in this case start at position [3] and finish at position number [6] // and if there is some difference only in area [3..6] of the ARRAY ex_2 go to 1 if you give enalbe he copy Data3[3..6] in Data4[3..6] // if something change in other array position[0..2] or [7..10] are ingnored ex_2 := TO_BOOL(util.SysMem.SysMemCmp(pBuffer1:=ADR(Data3[3]), pBuffer2:=ADR(Data4[3]), udiCount:=4)); IF ex_2 AND enable THEN util.SysMem.SysMemCpy(pDest:=ADR(Data4[3]), pSrc:=ADR(Data3[3]), udiCount:=4); END_IF // Attention udiCount input is intended in <byte> in the example 1 I pass to udiCount:=SIZEOF(Data1) for compare and copy the intere ARRAY and // SIZEOF pass the size of intere ARRAY in byte to the function input, in this 2 examples I used variable type SINT each one occupie 1 byte and one position in the ARRAY // and in the example 2 I pass udiCount:=4 for compare and copy only 4 position of Data3/4[3..6] if you want to extend this example and use it for an ARRAY OF WORD // remember that each WORD will occupe 2 byte (16 bit) and you will have to pass udiCount:=SIZEOF(Data1) if you need to compare intere ARRAY example 1 // but need udiCount:=(42) for the example 2 because need to compare and copy 4 word each occupie 2 byte (16 bit). // For REAL (32 bit) need udiCount:=SIZEOF(44) for LREAL or (64 bit) need udiCount:=SIZEOF(416) // a good rule is calculate the dimension of the ARRAY in byte without empty space at the end, multiple of data type number for variable bigger then 8 bit // Example : If you want to create an ARRAY for 5 REAL (32 bit) each occupie 4 byte the correct size is ARRAY[0..19] OF REAL 54=20 position. // NOTE : In the example the position of compare function util.SysMem.SysMemCmp is first and the copy function util.SysMem.SysMemCpy inside the IF is after // in one cycle of the program the two array is compared and if there is some difference and enable are copied. // If you move util.SysMem.SysMemCmp after the IF cycle he will copare the ARRAY in the current cycle but the copy of the value will do in the next cycle.</byte>
Last updated: 2025-10-24

Post by brouwyka on JSONByteArrayWriter string result incorrect order ^{CODESYS Forge talk (Post)}
Hello everybody! We are currently working on implementing a call to an API that tracks data sent to it through a JSON body. Versions: CODESYS V3.5 SP19 Patch 7 using IIOT Libraries SL license, specifically JSON Utilities SL version 1.13.0.0. For simplicity, let's say we want to construct the following JSON body for our request (simplified to just 1 key-value pair in each of the array objects to keep things shorter, but we'd have multiple fields in each in reality): { "id": "machine_1", "readings": [ { "temp_mid": 153.8 }, { "temp_mid": 98.3 } ], "status": "RUNNING" } However, our "readings" data is added over time, not in creation, so calls to the builder would be somewhat out of order. In a simplified manner, our calls would look like this: jsonBuilder(pJsonData := JsonData, diRootObj => rootJsonIndex); // rootJsonIndex = 0. // Set "id" at root JSON object. wsValue := "machine_1"; jsonBuilder.SetKeyWithValue("id", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 1, VALUE: diParentIndex = 1 & diIndex = 2. // ... Time passes, we get our first reading to add ... // The "readings" array does not exist yet, so we make it first at root JSON object before adding our first reading. readingsJsonArrayIndex := jsonBuilder.SetKeyWithArray("readings", diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 3, VALUE: diParentIndex = 3 & diIndex = 4. // Then add the first reading, for which we first have to make an object. readingsJsonArrayObjectIndex := jsonBuilder.SetObject(diParentIndex := readingsJsonArrayIndex); // JSONData OBJECT: diParentIndex = 4 & diIndex = 5. // And then we add the field(s) in the object for the first reading. // NOTE the use of `readingsJsonArrayObjectIndex` so we set the field(s) in the first object in the array. rValue := 153.8; jsonBuilder.SetKeyWithValue("temp_mid", wsValue, diParentIndex := readingsJsonArrayObjectIndex); // JSONData KEY: diParentIndex = 5 & diIndex = 6, VALUE: diParentIndex = 6 & diIndex = 7. // ... Time passes, we want to add another root-JSON-level field ... // Set "status" at root JSON object. wsValue := "RUNNING"; jsonBuilder.SetKeyWithValue("status", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 8, VALUE: diParentIndex = 8 & diIndex = 9. // ... Time passes, we want to add a second reading ... // "readings" array exists, so add the second reading, but first we have to make another object. // NOTE the re-use of the earlier stored `readingsJsonArrayIndex`, so we add the new object to that previously created array. readingsJsonArrayObjectIndex := jsonBuilder.SetObject(diParentIndex := readingsJsonArrayIndex); // JSONData OBJECT: diParentIndex = 4 & diIndex = 10. // And then we add the field(s) in the object for the first reading. // NOTE the use of `readingsJsonArrayObjectIndex` so we set the field(s) in the SECOND(, new) object in the array. rValue := 98.3; jsonBuilder.SetKeyWithValue("temp_mid", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 10 & diIndex = 11, VALUE: diParentIndex = 11 & diIndex = 12. // ... Finally, we want to send to the API, so we must convert the builder to data the client accepts as a body ... xTestWriteToJsonArray := TRUE; jsonArrayWriter( xExecute := xTestWriteToJsonArray, pwData := ADR(jsonDataString), udiSize := SIZEOF(jsonDataString), jsonData := JsonData^ ); IF jsonArrayWriter.xDone THEN // The writer was successful, the `jsonDataString` VAR should now contain a WString copy of the JSON object from the builder. xTestWriteToJsonArray := FALSE; END_IF We see that the JsonData STRUCT is correctly organised (in terms of the diParentIndex & diIndex set by it for each JsonElement) as we expect, as outlined in my comments in the simplified code above. However, as soon as we pass it to the jsonArrayWriter (which is a JSON.JSONByteArrayWriter), the resulting jsonDataString does not match our expectations, instead coming out like this: { "id": "machine_1", "readings": [ { "temp_mid": 153.8 } ] } { "temp_mid": 98.3 } "status": "RUNNING" The behaviour of the JSONByteArrayWriter thus seems to be the problem here. It does not seem to correctly process the children of JsonElements that are ARRAYs when additions to them are done broken up by additions to the lower level JSON OBJECT they are a part of. We have confirmed this by changing the order of the calls in our example to add both readings before adding the "status", in which case we get our expected outcome. However, in reality this is not possible for us - additions to any of the JSON's objects, arrays or array objects may happen at any time after other fields elsewhere in the JSON have been added. Does anyone know a way around this, a fix, or knows a solution we simply have not found? This same phenomenon was also noted on this forum by user @ryusoup at the end of 2023 (https://forge.codesys.com/forge/talk/Engineering/thread/c45929e2f1/#e27f) and user @mtho in early 2024 (https://forge.codesys.com/forge/talk/Engineering/thread/cd1bb450db/#1292) but both topics received no activity beyond both users' opening posts. Looking through the release notes of all the versions of the JSON Utilities SL library, I also did not see any remarks on resolutions of bugs in this vain. Thanks in advance for the assistance!
Last updated: 2026-06-10

Post by brandonje on [Error] IoDrvEtherNetIP Library with Weintek ^{CODESYS Forge talk (Post)}
I'm using weintek and Codesys V3.5 SP22 when I try to charge an ethernetIP device show me this error: ------ Build started: Application: Device.Application ------- Typify code... [ERROR] cip object, 4.9.0.0 (codesys): TCPIP_Interface: C0231: Expression of type 'BOOL' expected in this place [ERROR] cip object, 4.9.0.0 (codesys): TCPIP_Interface: C0077: Unknown type: '(_pPhysicalLink^._xLinkState <> CmpSysEthernet.OperStatus.SYSETH_OPERSTAT_Up)' [ERROR] cip object, 4.9.0.0 (codesys): TCPIP_Interface: C0077: Unknown type: 'CmpSysEthernet.OperStatus.SYSETH_OPERSTAT_Up' [ERROR] cip object, 4.9.0.0 (codesys): TCPIP_Interface: C0062: 'CmpSysEthernet.OperStatus' is no structured variable [ERROR] cip object, 4.9.0.0 (codesys): TCPIP_Interface: C0063: 'CMPSYSETHERNET, 3.4.3.0 (3S - SMART SOFTWARE SOLUTIONS GMBH)' contains no definition for 'OperStatus' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0046: Identifier '_diAdapterNumber' not defined [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: '_diAdapterNumber'' to type 'DINT' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: 'ADR(ethFrame.ethData)'' to type 'POINTER TO StructEthernetframe' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0077: Unknown type: 'ethFrame.ethData' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: 'ethFrame.udFrameLen'' to type 'ANY' [ERROR] cip object, 4.9.0.0 (codesys): SendEthFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): _OpenEthAdapter [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: '((driverInstance * 2) + 1)'' to type 'ANY' [ERROR] cip object, 4.9.0.0 (codesys): _OpenEthAdapter [TCPIP_Interface]: C0077: Unknown type: '(driverInstance * 2)' [ERROR] cip object, 4.9.0.0 (codesys): _OpenEthAdapter [TCPIP_Interface]: C0077: Unknown type: 'driverInstance' [ERROR] cip object, 4.9.0.0 (codesys): _OpenEthAdapter [TCPIP_Interface]: C0046: Identifier 'driverInstance' not defined [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0231: Expression of type 'BOOL' expected in this place [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'SIZEOF(ethFrame.ethData)' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'ethFrame.ethData' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0018: 'ethFrame.udFrameLen' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: 'ADR(ethFrame.ethData)'' to type 'POINTER TO BYTE' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'ethFrame.ethData' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [TCPIP_Interface]: C0201: Type 'SysEthernetFrame' is not equal to type 'SysEthernetFrame' of VAR_IN_OUT respectively REFERENCE 'ethFrame' [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0046: Identifier 'ethClose' not defined [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0018: 'ethClose' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0046: Identifier '_diAdapterNumber' not defined [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: '_diAdapterNumber'' to type 'DINT' [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0046: Identifier '_diAdapterNumber' not defined [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0018: '_diAdapterNumber' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0046: Identifier '_stName' not defined [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0018: '_stName' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0046: Identifier '_stDescription' not defined [ERROR] cip object, 4.9.0.0 (codesys): _CloseEthAdapter [TCPIP_Interface]: C0018: '_stDescription' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): AddressConflictDetection [TCPIP_Interface]: C0231: Expression of type 'BOOL' expected in this place [ERROR] cip object, 4.9.0.0 (codesys): AddressConflictDetection [TCPIP_Interface]: C0077: Unknown type: '(_pPhysicalLink^._xLinkState = CmpSysEthernet.OperStatus.SYSETH_OPERSTAT_Up)' [ERROR] cip object, 4.9.0.0 (codesys): AddressConflictDetection [TCPIP_Interface]: C0077: Unknown type: 'CmpSysEthernet.OperStatus.SYSETH_OPERSTAT_Up' [ERROR] cip object, 4.9.0.0 (codesys): AddressConflictDetection [TCPIP_Interface]: C0062: 'CmpSysEthernet.OperStatus' is no structured variable [ERROR] cip object, 4.9.0.0 (codesys): AddressConflictDetection [TCPIP_Interface]: C0063: 'CMPSYSETHERNET, 3.4.3.0 (3S - SMART SOFTWARE SOLUTIONS GMBH)' contains no definition for 'OperStatus' [ERROR] cip object, 4.9.0.0 (codesys): Recv [TCPIP_Interface]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): Recv [TCPIP_Interface]: C0046: Identifier '_diAdapterNumber' not defined [ERROR] cip object, 4.9.0.0 (codesys): Recv [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: '_diAdapterNumber'' to type 'DINT' [ERROR] cip object, 4.9.0.0 (codesys): Recv [TCPIP_Interface]: C0046: Identifier '_diAdapterNumber' not defined [ERROR] cip object, 4.9.0.0 (codesys): Recv [TCPIP_Interface]: C0032: Cannot convert type 'Unknown type: '_diAdapterNumber'' to type 'DINT' [ERROR] memory block manager, 3.5.21.30 (codesys): ObjectRetain [Disposable]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] memory block manager, 3.5.21.30 (codesys): ObjectRelease [Disposable]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [LLDP_Management]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [LLDP_Management]: C0201: Type 'SysEthernetFrame' is not equal to type 'SysEthernetFrame' of VAR_IN_OUT respectively REFERENCE 'frame' [ERROR] cip object, 4.9.0.0 (codesys): SendFrame [LLDP_Management]: C0201: Type 'SysEthernetFrame' is not equal to type 'SysEthernetFrame' of VAR_IN_OUT respectively REFERENCE 'ethFrame' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0032: Cannot convert type 'Unknown type: 'ADR(frame.ethData[0])'' to type 'POINTER TO BYTE' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'frame.ethData[0]' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0032: Cannot convert type 'Unknown type: 'SIZEOF(frame.ethData)'' to type 'UDINT' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'frame.ethData' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0018: 'frame.udFrameLen' is no valid assignment target [ERROR] cip object, 4.9.0.0 (codesys): CreateFrame [LLDP_Management]: C0077: Unknown type: 'SysEthernetFrame' [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Receive [UcmmReceiver]: C0448: Operator '__COMPARE_AND_SWAP' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Send [UcmmReceiver]: C0448: Operator '__COMPARE_AND_SWAP' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Enqueue [UcmmQueue]: C0448: Operator '__COMPARE_AND_SWAP' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Enqueue [UcmmQueue]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Enqueue [UcmmQueue]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Dequeue [UcmmQueue]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Dequeue [UcmmQueue]: C0448: Operator '__COMPARE_AND_SWAP' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] iodrvethernetip, 4.9.0.0 (codesys): Dequeue [UcmmQueue]: C0448: Operator '__XADD' is not supported by your current target. At least runtime system version 3.5.14.0 is required. [ERROR] asynchronous job manager, 5.0.0.0 (codesys): ExtendAsync [FactoryBase]: C0448: Operator '__COMPARE_AND_SWAP' is not supported by your current target. At least runtime system version 3.5.14.0 is required. Compile complete -- 71 errors, 0 warnings Build complete -- 71 errors, 0 warnings : No download possible
Last updated: 2026-08-20

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