Post by adaml on ScriptEngine - execute "Export -> Bootproject and firmware (SD Card)" from python ^{CODESYS Forge talk (Post)}
Hi everybody, recently I was checking how many time consuming manual tasks I can perform with python scripts through ScriptEngine. I have in the project many devices and currently I export bootprojects for them by right clicking on Application, then go Export -> Bootproject and firmware (SD Card) and then point folder where files should be exported. It's fine if project has few devices, but I have some of them with over 30 devices and manual clicking like that is very time consuming. How can I do it with python script? So far I found "create_boot_application" method from Application object (taken by projects.primary.find('Application', True)) but it only generates .app and .crc file instead of full structure to store on SD card (FIRMWARE, USERDATA, SDCARD.INI, Version, Version.txt.sig). Should I use some method to control user interface? Best regards, Adam
Last updated: 2024-07-05

Post by mubeta on Some 'pathetic' errors in SoftMotion program ^{CODESYS Forge talk (Post)}
Hello everyone, I have a very simple program for the process, but it's driving me crazy and I can't see the problems I'm left with: Short topological description: Dual Core Berghof controller with softmotion runtime version 3.5.19.30; Two axes with servodrive on canopen bus, clocked distributed from master; Ethercat I/O node; 2 ms ethercat task, 2 ms canopen bus cycle time; I/O objects of the canopen master and canopen drives connected to the ethercat task cycle; Problem 1: Two separate programs each manage their own axis and drive, with separate state machines. A first axis moves primarily in velocity, except having to position itself absolutely at a predetermined point at the end of the job; the second axis, on the other hand, is a paper unwinder that changes, for each job cycle, from actions in absolute, relative, and cam displacement with the master axis. Well, the state machine of both axes was written in such a way as to call running the useful FB and change it on state change in this way: CASE i_stateMachine OF 0: o_Power(Enable := TRUE, bRegulatorOn := FALSE, bDriveStart := FALSE, Axis := o_PaperUnwinderAxis); o_MoveAbs(Execute := FALSE, Axis := o_PaperUnwinderAxis); o_MoveRel(Execute := FALSE, Axis := o_PaperUnwinderAxis); o_CamSelect(Execute := FALSE, Master := o_MachineAxis, Slave := o_PaperUnwinderAxis, CamTable := cam_PaperUnwinder); o_CamIn(Execute := FALSE, Master := MachineEncoder, Slave := o_PaperUnwinderAxis); o_CamOut(Execute := FALSE, Slave := o_PaperUnwinderAxis); o_SetPosition(Execute := FALSE, Axis := o_PaperUnwinderAxis); IF ... THEN i_StateMachine := 10; END_IF; 10: o_Power( Enable := TRUE, bRegulatorOn := TRUE, bDriveStart := TRUE, Axis := o_PaperUnwinderAxis ); IF o_Power.Status THEN i_StateMachine := 20; END_IF; 20: (* Avanzamento carta *) o_MoveAbs( Execute := TRUE, Position := o_Somewhere, Velocity := 25.0, Acceleration := 3666.7, Deceleration := 3666.7, Jerk := 48000.0, Direction := MC_DIRECTION.positive, Axis := o_PaperUnwinderAxis ); IF o_MoveAbs.Done THEN o_MoveAbs(Execute := FALSE, Axis := o_PaperUnwinderAxis); i_StateMachine := 30; END_IF 30: d_HomingPosition := ...; o_SetPosition( Execute := TRUE, Position := d_HomingPosition, Mode := FALSE, Axis := o_PaperUnwinderAxis ); (* ... *) IF o_SetPosition.Done = TRUE THEN o_SetPosition(Execute := FALSE, Axis := o_PaperUnwinderAxis ); o_LogServer.Append(sMessage := '...', lscClass := LOGSERVER_CLASS.ALWAYS, sdt := o_CommonsMgrData.systime.sdtLocal); i_StateMachine := 40; END_IF; 50: ... The code above is a sketchy example of what I wanted to write. But it gives me a spot problem: in some, the state change results in a drive error, which is unrecoverable except with a reinitialization via SM3_ReinitDrive(). Things are improved a little if in the program I always run the call of all softmotion blocks in this way: o_Power(Axis := o_PaperUnwinderAxis); o_Jog(Axis := o_PaperUnwinderAxis); o_Halt(Axis := o_PaperUnwinderAxis); o_MoveAbs(Axis := o_PaperUnwinderAxis); o_MoveRel(Axis := o_PaperUnwinderAxis); o_CamIn(Master := MachineEncoder, Slave := o_PaperUnwinderAxis); o_CamOut(Slave := o_PaperUnwinderAxis); If I don't execute all the calls of all the motion FBs used, when exchanging machine state often (but not always), the axis goes into error with event id THE_FB_WASNT_CALL... Done a little diagnostics it seems that the FBs return the bDone, before they are completely terminated. I tried doing the machine state exchange not with the bDone bit of the FBs, but with the 'standstill' state of the axis. It didn't seem to change anything. Problem 2: During the use SM3_ReinitDrive() I get the erro in the log: "NetID 0: SDO read error for object 16#607C..." Assuming that the device involved it's one of the two servodrive, (no others device are present in the network), I don't found any object 0x607C in the 'possible object list in/out' of the two drive, and I don't understand where this object can be listed. So any ideas and suggestions regarding these two issues will be very, very welcome. If you need the source project, I am willing to send it.
Last updated: 2024-07-17

Post by micik on Python scripting - print whole project tree ^{CODESYS Forge talk (Post)}
Hello, I have found a script for printing device tree in Codesys project. This script is available as code snippet as an exmaple for using Python in Codesys. However I feel main documentation is lacking. For example, where can I find that object has "is_device" attribute? Code examples are given here: https://content.helpme-codesys.com/en/CODESYS%20Scripting/_cds_access_cds_func_in_python_scripts.html However, I have a question how to print the whole Project tree and not just devices? Of course I need to remove check: if treeobj.is_device: But simply removing this test condition will not produce what I want. I need to print PLC Logic, Application, ad other nodes in the Project tree. Where to find this documentation?
Last updated: 2024-08-12

Post by jonathan1321351 on IO-Link write parameters Ethernet/IP ^{CODESYS Forge talk (Post)}
I want to read and write parameters of an IO-Link device using acyclic messages. I have a Cube67+ in Ethernet/IP, connected to an IO-Link master. In the datasheet, I can find the parameters required for the message (Service, Class, Instance, etc.). I see the function block "Set_attribute_single" in the "EthernetIP Services" library, but I'm not sure how to correctly send the index and sub-index for the IO-Link device. The class in the datasheet is 0x80 for the IO-Link Parameter Object, but it’s not present in the CPIClass enum. Is there another function block more suitable for configuring IO-Link devices? (similar to "iol_call" in PROFINET or what’s used in EtherCAT).
Last updated: 2024-09-02

Post by jonathan1321351 on IO-Link read/write parameters Ethernet/IP ^{CODESYS Forge talk (Post)}
I want to read and write parameters of an IO-Link device using acyclic messages. I have a Cube67+ in Ethernet/IP, connected to an IO-Link master. In the datasheet, I can find the parameters required for the message (Service, Class, Instance, etc.). I see the function block "Set_attribute_single" in the "EthernetIP Services" library, but I'm not sure how to correctly send the index and sub-index for the IO-Link device. The class in the datasheet is 0x80 for the IO-Link Parameter Object, but it’s not present in the CPIClass enum. Is there another function block more suitable for configuring IO-Link devices? (similar to "iol_call" in PROFINET or what’s used in EtherCAT).
Last updated: 2024-09-04

Post by trusty-squire on How to revert to previous version library ^{CODESYS Forge talk (Post)}
Hi, I'm experiencing a bug with the latest version of SoftMotion CNC library (4.17), where the 3DPath object in Visu is missing all the important properties. I've verified that a previous app I was working on with library version 4.16 did not have this issue and the issue is duplicated in that project when I update it to 4.17. I've already submitted a bug report, but for the time being I need to revert the project I'm currently working on back a revision. I've tried right clicking on the library but the option to select the version is greyed out. Can anyone help me?
Last updated: 2024-09-05

Post by khaledkhalil on Question about the hairaichy of UaExpert ^{CODESYS Forge talk (Post)}
Hello, I am Examining this Example from Codesys Tutorial about OPC-UA server here https://www.youtube.com/watch?v=aJhzN3Uk-Do&list=PLWtD08CpmZcSV26aWh1axCAef5c5HxX-3&index=1&t=1167s. Now i am running to problem, when i create instances and i want them to appear directly under the object directory, However, it always appear with me under Objects >> Device set >> Device Name in CODESYS. I need to know how i can change the directory of my instances 'inst_3' and so on. So they can be under objects directly. I tried to modify the settings, but couldn't find any leads till now. Thanks in advance for helping
Last updated: 2024-09-12

Post by timvh on FB string and naming ^{CODESYS Forge talk (Post)}
I see, you want to initialize the FB. To be able to initialise it like you described, you need to add the FB_Init method to your FB. (right click on the FB, select add object --> method). Then press the arrow down, to select the FB_Init (overwrite default implementation). In the VAR_INPUT section of this method, add the variable --> Tag : STRING; Then in the code section of this method add: THIS^.Tag := Tag; // copy initial value to local variable in FB Search Google if you want to know more about FB_Init. PS, reflection + instance path, is also an option if you want to get the full name of the instance (path) of the Function Block. See: https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_pragma_attribute_instance_path.html
Last updated: 2024-09-30

Post by wistaro on How to use PLC_Open FBs with PROFINET servodrive (PROFIdrive layer) ^{CODESYS Forge talk (Post)}
Hello, I would like to know if there is a PROFIdrive layer in CODESYS. I am already familliar with Codesys's SoftMotion on CANOpen/EtherCAT (to control PLC Open FBs), and I need the same kind of stuff for PROFINET-IO devices; In my configuration, I have a CIFX board from Hischer to enable IRT, the SoftPLC "Codesys Control RTE V3 x64", and a servo-drive from INFRANOR that implements PROFINET / PROFIdrive (with IRT) protocol. This drive works well with the Object Technology of Tia Portal, but some customers use Codesys. Do you have an idea how to do that? Thanks in advance. Regards, William ROMIGUIERES INFRANOR France
Last updated: 2024-10-29

Post by gseidel on Beckhoff AS1060 and EL7041 configuration ^{CODESYS Forge talk (Post)}
Hi pmanuele, while I don't have firsthand experience with the EL7041 and the step motor AS1060, there are two things you can check: If you use an external encoder, please make sure you use the alternative device description calles "EL7041 1Ch. Stepper motor output stage (50V, 5A) Rev24 with external Encoder". The SoftMotion driver will set the feedback type automatically, and use the correct object for the actual position (16#6010:21 instead of 16#6010:20) If you have problems with changing the controller mode, I assume to velocity, please make sure you change the PDO mapping so that the actual velocity (16#6020:33) and set velocity (16#7010:33) are mapped by PDO. Hope this helps, Georg
Last updated: 2024-12-23

Post by hclai on Maximum Array Index Issue ^{CODESYS Forge talk (Post)}
I was trying to use a table object in visualization. I want to dynamically show the valid rows in the table. However, it does not work when there is 1 row. i put the maximum array index to 1. it does not show the 1st row. when i change to 2, it show the second row only. my project with older visualization profile version is working perfectly fine. I did some test and realized that i must use a Row Selection variable to change from 0 to 1. With this change of Row selection, then the row 1 will show up.
Last updated: 2025-06-19

Post by viksym on How to get the motor scaling value from code ^{CODESYS Forge talk (Post)}
If anybody finds this in the future, I managed to do it like this: scalingValue := EncoderPulseCountPerRev / ABS(AxisName.fScaleFactor); No need to use MC_ReadParameter as I am able to read this value directly from the axis object. Using an absolute value of the fScaleFactor is there in case the axis is set as inverted, in which case it would be a negative value. I was not able to figure out how to get EncoderPulseCountPerRev programatically, but since all my servos use an encoder with pulse count per revolution of 16#800000, the final equation looks like this: scalingValue := 16#800000 / ABS(AxisName.fScaleFactor);
Last updated: 2025-08-19

Post by fdmartello on Unable to compare projects containing alarm manager 4.5.0.0 ^{CODESYS Forge talk (Post)}
Hello. In Codesys version 3.5.19.50 when comparing two projects that have an "Alarm Configuration" obj from the Alarm Manager library vers. 4.5.0.0 the attached error pops up. This originally happened with two projects that I converted from vers. 3.5.17.30 so, thinking it was some conversion issue, I created two clean projects directly in 3.5.19.50 using the Standard Project template and only added the Alarm Configuration objects in them. The result is the same and the only way I found that allowed me to compare them is by deleting the incriminated object in one of the two projects. Has anyone else encountered this issue? Best regards
Last updated: 2024-01-19

Post by alexgooi on Function Blocks and arrays of function blocks ^{CODESYS Forge talk (Post)}
Hi Jack, I think you have to look at a FB in a different way. A Function block (Class) can contain its own data. In other words don't define loose data in your GVL, but define a instance of a FB (Object) in your GVL: Example: Function_Block Basic_Class VAR_INPUT Open_Command: BOOL; END_VAR VAR_OUTPUT Opened: BOOL; END_VAR if Open_Command then Opened := TRUE; ELSE Opened := FALSE; END_IF Global Variables Objects: ARRAY[1..100] OF Basic_Class; //Here you ar defining you objects END_VAR In your code you can directly acces the data and couple it to the IO: GVL.Objects[1].Open_Command := %IX0.0; %QX0.0 := GVL.Objects[1].Opened; //To call the code itself use: GVL.Objects[1](); If you want to take this a step further you are also able to add methods and properties to the FB/Class end thereby creating a OOIP program
Last updated: 2024-02-15

Post by struccc on Release SP20 - Changes in behaviour? ^{CODESYS Forge talk (Post)}
Dear all, I've just started to migrate some of my ancient projects to SP20. There is one strange error (?) I have noticed so far. In a method call, depending on the circumstances I would like to return reference to an object, or an invalid reference: METHOD Add_EVT_OUT : REFERENCE TO FB_MSG VAR END_VAR IF __ISVALIDREF(refMSG_Entry) THEN Add_EVT_OUT REF= MANAGER.AddMsg_EVT_OUT( refMSG_Entry, _Get_EVT_Message(MSG_EVENT.OUT), _Get_EVT_AddCode(MSG_EVENT.OUT) )^; ELSE Add_EVT_OUT := 0; END_IF So far setting a reference variable to 0, did this. But now, the expression Add_EVT_OUT := 0; gives an error: [ERROR] DB_WTP_370: Add_EVT_ACK MSG_TRIGGER_EXT: C0032: Cannot convert type 'BIT' to type 'REFERENCE TO FB_MSG' Naturally... I can write: Add_EVT_OUT := DWORD#0; But is this the correct way? Is there any constant I could use instead, like "NULL"? Or this is totally wrong and to be avoided?
Last updated: 2024-03-24

Post by gseidel on CNC / G01 Speed is very slow (or go-stop motion) in Continuous short segment . ^{CODESYS Forge talk (Post)}
Hi k2saki, I would recommend to have a look at SMC_SmoothMerge, followed by SMC_SmoothPath. SmoothMerge will combine the small G1 elements to longer splines, SmoothPath will avoid stops between the splines. https://content.helpme-codesys.com/en/libs/SM3_CNC/Current/SM_CNC_POUs/SoftMotion-CNC/SoftMotion-Function-Blocks/SMC_SmoothMerge.html For SmoothMerge to work, you have to configure a tolerance, i.e. by how much it may deviate from the lines. To graph the output of the interpolator, you can use the trace. (Add a trace object below the application, and add the variables you are interested in to the trace.) Best regards, Georg
Last updated: 2024-04-30

Post by tayhim on WAGO HMI Device not found ^{CODESYS Forge talk (Post)}
Hello, I'm trying to connect with a Wago TP600 HMI but without success. I'm using codysis 3.5 SP19 patch 7 (SP20 block all the time) and the official wago package is installed. However, when I scan and select my device, I get a message saying that the device doesn't match the project's device object with the possibility to update the device (as shown in the attached picture). however, after choosing to update i got a message that the device is not found. I've tried with a new empty project but the same results. do you have any ideas? Thanks.
Last updated: 2024-06-25

Post by vstrom on Codesys v3.5.22.10 - Fail to create a project Archive ^{CODESYS Forge talk (Post)}
Hi to all, I've created a project using the File->New Project-> Standard Project command. Then I've add the object "Visualization Manager" and then tried to create a project archive (File->Project Archive->Save Archive), but it fails with the error "Access to the path 'C:\Program Files\CODESYS 3.5.22.10\CODESYS\Common\3hxi4iod.put' is denied". The idicated file don't exist. First time of use of the new Codesys versionù, I've reinstalled the developement software but nothing change. If I don't add the Visualization part, the archive is created, it's seems to be a problem with the HMI part. Any ideas? Thanks
Last updated: 2026-04-22

Post by brouwyka on JSONByteArrayWriter problem? ^{CODESYS Forge talk (Post)}
Hey there! I am currently running into the exact same issue. The JsonData object has all inexes & parent indexes in the way I expect, everything is correctly "linked". It purely seems that the writer is incorrectly parsing said JsonData, not based on parent & child index, but on something else that breaks it and puts things at the root, instead of the specified parent index. Did you ever manage to find a solution, or another way of achieving your JSON composing? I'm currently working on Codesys V3.5 SP19 Patch 7 with IIOT Libraries SL 1.13.0.0, specifically JSON Utilities SL 1.13.0.0 (to send requests to APIs with JSON bodies using Web Client SL 1.13.0.0).
Last updated: 2026-06-08

Post by brouwyka on JSON Utilities - JSON file written with invalid structure ^{CODESYS Forge talk (Post)}
Hey there! I am currently running into the exact same issue (and have also posted to a similar post here: https://forge.codesys.com/forge/talk/Engineering/thread/c45929e2f1/#e27f). The JsonData object has all inexes & parent indexes in the way I expect, everything is correctly "linked". It purely seems that the writer is incorrectly parsing said JsonData, not based on parent & child index, but on something else that breaks it and puts things at the root, instead of the specified parent index. Did you ever manage to find a solution, or another way of achieving your JSON composing? I'm currently working on Codesys V3.5 SP19 Patch 7 with IIOT Libraries SL 1.13.0.0, specifically JSON Utilities SL 1.13.0.0 (to send requests to APIs with JSON bodies using Web Client SL 1.13.0.0).
Last updated: 2026-06-08

Post by laurits on Max lines of code, codesys CNC ? ^{CODESYS Forge talk (Post)}
Hi, yes now its working, to get "QUEUE.bFull" to work, I've had to set the "QUEUE.nNumReservedEntries" to 3. (I tried different values here, only effect for larger values i can see is the the queue capacity gets smaller.) I've noticed the movement is slowing down when it reaches the end of the "fill Up", must be because of the "checkVelocity" can only see the current "QUEUE". Any way of solving this ? BUF : ARRAY[0..20000] OF SMC_GEOINFO; xp : ARRAY[1..100000] OF REAL; yp : ARRAY[1..100000] OF REAL; CASE iState OF 000: IF R_TRIG_bStart.Q THEN iState := iState + 1; END_IF bReady := FALSE; //initialize Queue GEO.dT1:=0; GEO.dT2:=1; GEO.dToolRadius := 0; GEO.dVel := 15000; GEO.dVelEnd := 15000; GEO.dAccel := 2000; GEO.dDecel := 2000; GEO.iObjNo := 0; GEO.piDestPos.dX := 0; GEO.piDestPos.dY := 0; QUEUE.bEndOfList := FALSE; QUEUE.nPastMarker := -1; QUEUE.nWritePos := 0; QUEUE.pbyBuffer := ADR(BUF[0]); n := 0; sMC_CheckVelocities(bExecute:= FALSE); SM3_CNC.SMC_SetQueueCapacity(ADR(QUEUE), SIZEOF(BUF)); QUEUE.nNumReservedEntries := 3; 001: FOR i := 1 TO SIZEOF(xp)/SIZEOF(xp[1]) DO xp[i] := UDINT_TO_REAL(i) * 0.01; yp[i] := UDINT_TO_REAL(i) * 0.01; END_FOR iState := iState + 1; 002: WHILE NOT QUEUE.bFull DO // when the Queue is full, wait until it has been processed by the following FBs n := n + 1; GEO.iSourceLine_No := n; GEO.piStartPos := GEO.piDestPos; // copy last destination GEO.iMoveType := LIN; // generate linear movement GEO.iObjNo := GEO.iObjNo + 1; // calculate number GEO.piDestPos.dX := xp[n]; // generate position GEO.piDestPos.dY := yp[n]; SMC_CalcLengthGeo(pg := ADR(GEO)); // calculate length of object with the help of the standard function SMC_AppendObj(poq:=ADR(QUEUE), pgi:=ADR(GEO)); //append object to queue IF n = UDINT_TO_DINT( SIZEOF(xp)/SIZEOF(xp[1])) THEN // all target positions processed QUEUE.bEndOfList := TRUE; iState := iState + 1; EXIT; END_IF END_WHILE sMC_CheckVelocities(bExecute:= TRUE, poqDataIn:= ADR(QUEUE)); bReady := TRUE; // Send message to smc_interpolator to start 003:
Last updated: 2025-06-04

Post by hhermsen on Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue ^{CODESYS Forge talk (Post)}
Internal compiler error in SP22.x (expLValue null) — SP21 unaffected — need help isolating root cause I'm hitting the same internal compiler crash reported here. Same exact stack trace (AssignmentStatementReplacer → CreateAssignmentExpression → ArgumentNullException: Value cannot be null. Parameter name: expLValue), but in my case triggered by a self-written library, not a Visualization object — so this looks like a general SP22.x codegen regression rather than something tied to one specific language feature. What I've confirmed: Reverting to SP21 — no issue, builds clean SP22.x — internal compiler crash during Build > Application, code generation phase, with zero useful location info (no POU, no line number) check_for_errors/precompile-only passes cleanly; the crash only happens on a real full build, meaning static analysis never sees it coming What I've tried to isolate the cause (without success): Removed a suspected pattern involving a VAR_IN_OUT parameter used directly as a FOR-loop control variable, combined with early RETURN inside the loop — crash persisted identically afterward Confirmed no Visualization Manager or similar object in the project (ruling out the trigger in the linked report) Used an AI coding assistant (Claude Code) to search for other suspicious patterns — no luck pinpointing the exact statement Question @codesys-com Since the compiler gives no location info at all, is there any way to get more diagnostic output from the SP22.x codegen phase (verbose/debug build flags, log level settings, etc.)? Without that, isolating this in a large library means blind bisection — cutting the codebase in half repeatedly until the crash disappears, which is slow and error-prone without official tooling support. Happy to share the affected project or a minimal repro if that helps CODESYS engineering track it down.
Last updated: 2026-07-11

Post by alexschooneveld on OPC UA PubSub SL 1.3 — UADP WriterGroup with assigned PSS.SecurityGroup still publishes plaintext ^{CODESYS Forge talk (Post)}
I am currently investigating an OPC UA PubSub connection over UDP. When I don't use encryption, the publish and subscribe are working correctly. But with encryption it does not. Environment OPC UA PubSub SL 1.3.0.0 (namespace UADP) OPC UA PubSub Security 1.3.0.0 (namespace PSS) OPC UA PubSub Base 1.3.0.0 (namespace PSB, incl. PSS.SecurityGroup / PSS.CONFIG) Programmatic PubSub in a CFC: UADP.Configuration → UADP.Connection → UADP.writerGroup → UADP.writer → writerDataSet, plus a CyclicCall gated by xEnable. Goal: publish secured UADP, SignAndEncrypt, policy PubSub-Aes256-CTR. What I do (one-shot, before xEnable := TRUE): fbSecurityGroup.SetInitialValue( 'http://opcfoundation.org/UA/SecurityPolicy#PubSub-Aes256-CTR', PSB.SECURITY.SIGNING_AND_ENCRYPTION); stSecurityCfg := fbSecurityGroup.GetConfig(eErrorID => eError); // eError=NO_ERROR, udiEncryptionKeySize=32 eError := fbSecurityGroup.SetSecurityKeys(udiTokenId, ADR(abyKey), SIZEOF(abyKey), 2436001000); // eError=NO_ERROR, SIZEOF=68 // writerGroup.itfSecurityGroup := fbSecurityGroup -- set in the WriterGroup block's Parameters (a per-scan code write got overwritten) What I verified eError = NO_ERROR after both GetConfig and SetSecurityKeys; udiEncryptionKeySize = 32. Key length = 68 bytes (signing 32 ‖ encrypt 32 ‖ nonce 4). itfSecurityGroup is set via the WriterGroup's Parameters (so it isn't clobbered each scan). Init runs before xEnable (the writer doesn't run with xEnable=FALSE). The UADP.writerGroup FB exposes only itfSecurityGroup for security — no SecurityMode/MessageSecurityMode property. Result: the published datagrams are still plaintext — ExtendedFlags1 = 0x01 (security bit 0x10 clear), no security header: b1 01 29 00 0f 16 00 … (PublisherId 41, WriterGroupId 22, RawData, no security) Questions With UADP.writerGroup, is assigning a configured + keyed PSS.SecurityGroup to itfSecurityGroup sufficient to enable message security, or is there an additional step/property/method to switch the WriterGroup to SignAndEncrypt? At what point in the WriterGroup lifecycle is itfSecurityGroup read? Must it be assigned/keyed before xActive, and does the group need a stop→start to pick it up? Is there a required call order, and does SetSecurityKeys need to be called once or repeatedly? Should security be configured on the Connection/Configuration level rather than (or in addition to) the WriterGroup? Is there a working example of secured (SignAndEncrypt) programmatic UADP publishing with this library, or a known limitation in 1.3? How can I read back at runtime whether security is actually active (via itfDiagnostics or similar)? Additional information I can confirm that the consumer side works — i.e. a standard subscriber decrypts the same keys fine — so the keys/profile aren't the issue. The Wireshark capture of the published message is: 0000 b1 01 29 00 0f 16 00 df 0d bb 25 01 00 0e 00 1b ..).......%..... 0010 0e 00 00 00 00 00 00 00 ........
Last updated: 2026-06-22

Post by alexschooneveld on OPC UA PubSub SL 1.3 — UADP WriterGroup with assigned PSS.SecurityGroup still publishes plaintext ^{CODESYS Forge talk (Post)}
I am currently investigating an OPC UA PubSub connection over UDP. When I don't use encryption, the publish and subscribe are working correctly. But with encryption it does not. Environment OPC UA PubSub SL 1.3.0.0 (namespace UADP) OPC UA PubSub Security 1.3.0.0 (namespace PSS) OPC UA PubSub Base 1.3.0.0 (namespace PSB, incl. PSS.SecurityGroup / PSS.CONFIG) Programmatic PubSub in a CFC: UADP.Configuration → UADP.Connection → UADP.writerGroup → UADP.writer → writerDataSet, plus a CyclicCall gated by xEnable. Goal: publish secured UADP, SignAndEncrypt, policy PubSub-Aes256-CTR. What I do (one-shot, before xEnable := TRUE): fbSecurityGroup.SetInitialValue( 'http://opcfoundation.org/UA/SecurityPolicy#PubSub-Aes256-CTR', PSB.SECURITY.SIGNING_AND_ENCRYPTION); stSecurityCfg := fbSecurityGroup.GetConfig(eErrorID => eError); // eError=NO_ERROR, udiEncryptionKeySize=32 eError := fbSecurityGroup.SetSecurityKeys(udiTokenId, ADR(abyKey), SIZEOF(abyKey), 2436001000); // eError=NO_ERROR, SIZEOF=68 // writerGroup.itfSecurityGroup := fbSecurityGroup -- set in the WriterGroup block's Parameters (a per-scan code write got overwritten) What I verified eError = NO_ERROR after both GetConfig and SetSecurityKeys; udiEncryptionKeySize = 32. Key length = 68 bytes (signing 32 ‖ encrypt 32 ‖ nonce 4). itfSecurityGroup is set via the WriterGroup's Parameters (so it isn't clobbered each scan). Init runs before xEnable (the writer doesn't run with xEnable=FALSE). The UADP.writerGroup FB exposes only itfSecurityGroup for security — no SecurityMode/MessageSecurityMode property. Result: the published datagrams are still plaintext — ExtendedFlags1 = 0x01 (security bit 0x10 clear), no security header: b1 01 29 00 0f 16 00 … (PublisherId 41, WriterGroupId 22, RawData, no security) Questions With UADP.writerGroup, is assigning a configured + keyed PSS.SecurityGroup to itfSecurityGroup sufficient to enable message security, or is there an additional step/property/method to switch the WriterGroup to SignAndEncrypt? At what point in the WriterGroup lifecycle is itfSecurityGroup read? Must it be assigned/keyed before xActive, and does the group need a stop→start to pick it up? Is there a required call order, and does SetSecurityKeys need to be called once or repeatedly? Should security be configured on the Connection/Configuration level rather than (or in addition to) the WriterGroup? Is there a working example of secured (SignAndEncrypt) programmatic UADP publishing with this library, or a known limitation in 1.3? How can I read back at runtime whether security is actually active (via itfDiagnostics or similar)? Additional information I can confirm that the consumer side works — i.e. a standard subscriber decrypts the same keys fine — so the keys/profile aren't the issue. The Wireshark capture of the published message is: 0000 b1 01 29 00 0f 16 00 df 0d bb 25 01 00 0e 00 1b ..).......%..... 0010 0e 00 00 00 00 00 00 00 ........
Last updated: 2026-06-22

Post by timvh on Current Visu name without Current Visu Variable ^{CODESYS Forge talk (Post)}
To get the current visu for all your individual web clients, you could iterate over them, using the same library 1) Create a new function block which implements VU.IVisualizationClientIteration 2) Create an instance of this function block + add an instance of the "iterate" function block fbIterateCallBack : FB_IterateOverClients; // this implements VU.IVisualizationClientIteration fbVuIterate : VU.FbIterateClients; // this FB iterates over all clients 3) Call the fbVuIterate and set the reference to the call back FB. Then it will automatically call the method "HandleClient" of this function block. fbVuIterate( xExecute:= NOT fbVuIterate.xDone, xDone=> , xBusy=> , xError=> , itfClientFilter:= VU.Globals.OnlyWebVisu, eError=> , itfIterationCallback:= fbIterateCallBack); In the HandleClients method you can use the property of the interface of your webclient to which page it is currently on: sCurrentVisuOfClient := itfClient.CurrentVisuName; 4) Optionally from here you could also set the visu for the webclient, but this might be obsolete, because the other function block is now available... xQueryOK : BOOL; xChangePage : BOOL; itfVisuClientRawData : VU.IVisualizationClientRaw; xQueryOK := __QUERYINTERFACE(itfClient, itfVisuClientRawData); IF xQueryOK AND xChangePage THEN VisuElems.g_VisuManager.SetMainVisu(pClientData := itfVisuClientRawData.ClientDataPointer, stVisu := 'Visu2'); xChangePage := FALSE; END_IF
Last updated: 2025-08-13

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