Post by antonz on OSCAT Scale_r function not working in LD 4.60 works in LAD2 on 3.5.21sp3 ^{CODESYS Forge talk (Post)}
That's what I found as well Shaun. I have seen it at least in versions 3.5.21.1 and 3.5.21.3. There seems to be an issue with the FBD/LD package v4.6.0.0. The workaround proposed by Tim works but needs to be done manually on every code change/addition. For now we manually downgrade the FBD/LD package from v4.6.0.0 down to v4.5.0.0 after installation of CoDeSys. Same as you did. I hope this gets fixed on a next patch.
Last updated: 2025-11-21

Post by sheberle on ERROR: Calling the program "AlarmStorage_Prg" is not allowed from multiple tasks ^{CODESYS Forge talk (Post)}
Do you have any additional information about when the error occurs? I am trying to recreate this issue to find a workaround... Maybe you could also make the project available. You could add the following logfilter to the CODESYS configuration file: [CmpLog] Logger.0.Filter=0xFFFFFFFF Logger.0.Enable=1 Logger.0.MaxEntries=10000 Logger.0.MaxFileSize=1000000 SysSem.Filter=0xFFFFFFFF SysTask.Filter=0xFFFFFFFF I hope that the log filter will show us which task is responsible for this, so we can narrow it down a bit more.
Last updated: 2026-03-31

Post by kmax365 on ModbusTCP_FunctionCode06 ^{CODESYS Forge talk (Post)}
Hey Guys, I am trying to create a ModbusTCP_FunctionCode06 which i will use as a single write register for programming a test code for Power Meter(PQM_1000) I have tried to reserach how to add it it from the libraray manager and have largely been unsuccessful. Does anyone know where I should Look? And by the way, I am i wam using Codesys V3.5 Vs 21 Patch 4 I look forward to something positive. Best, Kmax365.
Last updated: 2026-05-14

Post by kmax365 on ModbusTCP_FunctionCode06 ^{CODESYS Forge talk (Post)}
Hey Guys, I am trying to create a ModbusTCP_FunctionCode06 which i will use as a single write register for programming a test code for Power Meter(PQM_1000) I have tried to reserach how to add it it from the libraray manager and have largely been unsuccessful. Does anyone know where I should Look? And by the way, I am i wam using Codesys V3.5 Vs 21 Patch 4 I look forward to something positive. Best, Kmax365.
Last updated: 2026-05-14

Post by josepmariarams on Limit Axis CNC Jerk using SMC_Polynomial_AbsMaxLocs ^{CODESYS Forge talk (Post)}
Dears. Until now, I have been using CNC libraries with Codesys 3.5SP11. I was using SMC_Polynomial_AbsMaxLocs function, from CNC library, to calculate the axis jerks, interpolating splines, to limit it. Now I have passed to SP20, and the functions which calculates the zeros and the maximum-minimum and zeros of polynomials has been disapeared. Questions: -Exist any FB wich can limit the jerk of individual axis in CNC? -Exist any other functions which can calculate max-min and zeros of polynomials? Thanks
Last updated: 2026-05-22

Post by baltzer on ICertificateVerifier.VerifyCertificate doesn't appear to override an ERR_CERT_HAS_EXPIRED rejection in TCP_Client.Upgrade() ^{CODESYS Forge talk (Post)}
Follow-up: working workaround found (routing TLS outside CODESYS) For anyone finding this thread later with the same problem (a third-party device presenting a self-signed and/or expired certificate that ICertificateVerifier/udiVerificationMode won't let you connect through) - we never got a working fix within NBS itself, but found a practical workaround worth sharing. Approach: run a local TLS-terminating proxy on the same host as the CODESYS runtime, and have CODESYS talk plain, unencrypted TCP to it instead of connecting to the remote device directly over TLS: CODESYS --plain TCP--> 127.0.0.1:<port> --stunnel/TLS--> <remote device>:<port> We used stunnel (client mode), with certificate verification explicitly disabled at that layer (verifyChain = no, verifyPeer = no) - a simple, well-documented one-line option, unlike anything we could get working inside NBS. Running it as a systemd service with Restart=always means it survives reboots and recovers automatically if the proxy or the remote device drops. On the CODESYS side, this required no changes beyond pointing TCP_Client at 127.0.0.1 instead of the device's real IP, and removing the TLSContext/ICertificateVerifier code entirely - the rest of our application-layer logic (framing, checksums, etc.) was completely unaffected, since none of that ever depended on where the TLS termination happened. Confirmed working end-to-end against a real device with an expired self-signed certificate, running on CODESYS Control for Raspberry Pi SL (Linux). We haven't yet set this up on Windows - stunnel does have Windows builds available, so the same general approach should be possible there too, but that combination isn't tested or confirmed by us at this point. Caveat: this only makes sense when the proxy and the CODESYS runtime are on the same trusted host (in our case, both on the same Raspberry Pi) - don't expose the proxy's plaintext side on a reachable network interface, since that would create an unauthenticated plaintext path to the device. The original question - whether there's a supported way to override an ERR_CERT_HAS_EXPIRED/self-signed rejection from within NBS's own TLSContext/ICertificateVerifier - remains open as far as we know. Still happy to hear from anyone who's solved that particular piece, since the workaround above is a practical detour rather than an actual answer to the original question.
Last updated: 2026-08-06

Post by leag on Reset device password Festo PLC ^{CODESYS Forge talk (Post)}
Hi, I am new to CODESYS, and I want to program a new FESTO, but I am getting this authentication screen. I don't remember the password. I tried with Administrator/Administrator and some other defaults I found online but nothing works. I also tried searching for CODESYSControl_User.cfg and many other recommended directories but I dont seem to have any of them (like CODESYSControlWinV3x64) Could you please help me understand what I need to reset? Thanks a lot
Last updated: 2026-08-12

Post by jgalaska on SMC_Trafo 6DOF Config Error ^{CODESYS Forge talk (Post)}
Hello, Recently I was trying to run 6DOF robot in codesys via SMC_Trafo_ArticulatedRobot_6DOF, unfortunately no matter what parameters I tried, it always outputs InvalidConfig Error. I saw the same issue in a topic: https://forge.codesys.com/forge/talk/Motion/thread/16e1f0327f/ But if I understand correctly, the user solved it by developing his own version of this block. I wanted to know if it is a bug in the library (SM3_CNC 4.20.0.0) or am I doing something wrong? Can anyone confirm that they can use the FB without it reporing the Error? Kind regards,
Last updated: 2026-01-21

Post by gland on Open project automatic with correct version ^{CODESYS Forge talk (Post)}
Goodmorning, The projects we have made (with several persons) are in differents versions, Codesys V3.5 sp18 patch4, V3.5 sp19 patch 2, V3,5 sp19 patch 5 etc V3.5 sp21 patch 3 etc.. Now when we're opening an project thats's not opend before on my pc and we're not sure in witch version it's made it's quite annoying. We don't want to update to the newest version. Is there a way that it's automatic opening the correct version? Is there a program/tool/easy way to do this? Thanks,
Last updated: 2026-01-27

Post by fleaplc on CPU + EtherCAT redundancy ^{CODESYS Forge talk (Post)}
Hi all, for a new project I'm looking for a redundant controller with EtherCAT fieldbus I/O. Actually I'm using Beckhoff and it works great! but there's not a solid redundancy yet... Does someone get experience for industrial application (not raspberry) for a redundant Codesys system? If yes please share some info (CPU / OS type, bus, number of managed I/O,... and especially feeling feedback (stability, bugs, performance)... Every suggestion is kindly appreciated!! Fabrizio
Last updated: 2026-01-27

Post by nz-dave on *exception* [processorloadwatchdog] occurred in: app=[all], task=[all] ^{CODESYS Forge talk (Post)}
Can anyone shed some light on this issue im having. at random, sometimes days, sometimes weeks or months. i get this error and have to reset the plc. Im using a Weintek HMI with ethernet/ip remote io and vsd. i have tried increasing my task times and watchdogs. and when i view my PLCload in the shell its normally around 3-4%, highest ive ever seen is 7%. Nothing i do seems to help the issue. Could the HMI's Codesys CPU be getting to hot do to high ambient temp?
Last updated: 2026-02-01

Post by winki on Error in licence activation ^{CODESYS Forge talk (Post)}
Hello, Despite receiving an activation message after entering the license number, I don’t have any license installed on my gateway. I went to check in /var/opt/codesys/ and there is no License file. I searched the entire gateway for a .lic file and found no license. I’m really stuck—how can I fix this, please? When I am using the licence tools I got this picture: But nothing that have been activated. Loic,
Last updated: 2026-02-03

Post by winki on Error in licence activation ^{CODESYS Forge talk (Post)}
Hello, Despite receiving an activation message after entering the license number, I don’t have any license installed on my gateway. I went to check in /var/opt/codesys/ and there is no License file. I searched the entire gateway for a .lic file and found no license. I’m really stuck—how can I fix this, please? When I am using the licence tools I got this picture: But nothing that have been activated. Loic,
Last updated: 2026-02-03

Post by alexgooi on No Bootproject possible ^{CODESYS Forge talk (Post)}
Dear Forum, When using a online-change I often get the following message: No Bootproject possible in this state: application out of memory. Perform full download first. I'm using Codesys virtual control for linux SL running on a docker server with plenty of memory available, therefore I’m not expecting a hardware limitation. Is there a setting available to for example reserve more memory, so the controller is not that quick out of memory? thank you in advance. Alex
Last updated: 2026-03-27

Post by confre on Combo box drop-down invisible ^{CODESYS Forge talk (Post)}
Hi, I created a combo box and I need to know when the drop‑down menu is open, in order to avoid hiding the combo box while the drop‑down is visible. Alternatively, if it’s not possible to detect whether the drop‑down is open, I would like to know how to close or hide the drop‑down programmatically when the combo box is made invisible. I'm using Codesys 3.5 SP19 on IFM CR1074 without touch screen (with standard keyboard handling) Thanks.
Last updated: 2026-04-09

Post by struland on OPC UA Codesys 3.5 Symbolkonfiguration VS Kommunikationsverwalter und Python/UA-Expert ^{CODESYS Forge talk (Post)}
Hallo mattplc, man kann das Leid mitfühlen. OPC UA verspricht immer so viel. Aber wenn es um die praktische Umsetzung geht, und man damit die Aufgabe "schicke Daten von A nach B" lösen möchte, trifft man unvermutet auf den Endgegner. Der Mega-Bösewicht der Komplexität und Kompliziertheit. Was Dein Problem angeht, vermute ich mal das es mit dem Thema "Informationsmodell" zusammenhängt. Viel Erfolg auf Deiner Reise ✊✊✊
Last updated: 2026-05-22

Post by fabiodasilveira on Static Analysis Error SA0026 ^{CODESYS Forge talk (Post)}
Hello Everyone, I am really struggling to understand why codesys would present an error regarding the following: VAR strByte1: STRING(10):= '192'; strByte2: STRING(10):= '168'; strByte3: STRING(10):= '1'; strByte4: STRING(10):= '0'; strIPAddress: STRING:= '192.168.1.1'; END_VAR //Updating Variables strByte1:= BYTE_TO_STRING(GVL.abyPSsIpAddress[0]); strByte2:= BYTE_TO_STRING(GVL.abyPSsIpAddress[1]); strByte3:= BYTE_TO_STRING(GVL.abyPSsIpAddress[2]); strByte4:= BYTE_TO_STRING(GVL.abyPSsIpAddress[3]); strIPAddress:= CONCAT(strByte1, CONCAT('.', CONCAT(strByte2, CONCAT('.', CONCAT(strByte3, CONCAT('.', strByte4)))))); Any help would be much appreciated.
Last updated: 2026-07-27

Post by dmb-fan on Attemp Convert old V2.3 projects : Error HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) ^{CODESYS Forge talk (Post)}
I had runnig this already. Then I updated to SP22 patch3. After that I got always this error: ===== Project importieren: XXXXnameYYYYYY ===== *[FATALER FEHLER] Fehler beim Import des Projekts: Ausnahmefehler des Servers. * [FATAL ERROR] Error importing the project: Server exception. (Exception to HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) I delete the version and installed again. Same. I uninstalled all CoDeSys on the PC and installed the old SP22 patch2 new. Same error by opening old projects. Immediatly, not by converting. Convert V3.5.17 was always installed. What is happening or what can I do?
Last updated: 2026-08-11

Post by nixola on Exception handler return value purpose in _CODESYS 3.5 ^{CODESYS Forge talk (Post)}
Hi, I was trying to figure out how to correctly handle system exceptions in a CODESYS project, but either the documentation falls short, or I'm unable to find the proper docs. I know I can register a function as an exception handler via Task Configuration > System Events > Add Event Handler, which will create a function with the correct interface; I am, however, unable to figure out what the returned DWORD is supposed to be, if anything. Is the interface for the exception handler documented and, if so, where can I find it?
Last updated: 2026-08-31

Post by tarek on How to add/Scan devicenet Master/Slave ^{CODESYS Forge talk (Post)}
Hello, i have a similar problem with this. Im using an EL6752 from Beckhoff DeviceNet Master and i dont have an EDS for the comms with the slave (EVO GT II Valve). In CODESYS they dont let me put a digital slave. My question, how can i add a slave in the EL6752 the Process data mapping to see values. I cant add a DeviceNet slave in the tree, thanks
Last updated: 6 days ago

Post by sunfloweeerrry on Edgelogix-rpi-1000-cm4102032 SPI port connection to PiFace I/O Driver in CodeSys. ^{CODESYS Forge talk (Post)}
Hello, I hv a problem. Couldn't solve this for 2 days now. So I'm quite new at CodeSys and I have to use the spi port x30 on the edgelogix rpi 1000. So what I have to do is just 'add device' at the SPI where I hv to pick the 'SPI master' after that I hv to change the parameters according to the edgelogix I did found in the spidev.h but nothing got updated so I 'add device' again where I pick the PiFace I/O Driver and I put my variables at the I/O Mapping, which i put the input startbit at the in part and led at the out part. I want to make the led blink according to my structured text code but somehow the hardware didn't connected with the CodeSys spi port. Nothing happens. Any idea what I have to do?
Last updated: 2023-08-18

Post by jegerjon on Find index based on values ^{CODESYS Forge talk (Post)}
Hi, I need to figure out witch indexes of an Array containing the highest and lowest values. Typically search for the 5 lowest values and result the indexnumbers containing the 5 lovest values. is there a library for this, or codeexample?
Last updated: 2023-08-20

Post by jegerjon on Find index based on values ^{CODESYS Forge talk (Post)}
Hi, I need to figure out witch indexes of an Array containing the highest and lowest values. Typically search for the 5 lowest values and result the indexnumbers containing the 5 lovest values. is there a library for this, or codeexample?
Last updated: 2023-08-20

Post by sven01 on Documentation / Usage Help For Scripting Engine Libraries ^{CODESYS Forge talk (Post)}
Hi, I am still not able to figure out how to use the the classes and their functions. 😔 Let's say I would like to use the function "importfile()" from the class "ScriptTextListObject.ScriptTextListMarker". I would be grateful for an additional example. Thanks! 😊
Last updated: 2023-08-21

Post by kunz on Profinet Device keeps abort connection with AR alarm.ind(err) ^{CODESYS Forge talk (Post)}
Can somebody explain what the error Connection aborted: AR alarm.ind(err) exactly mean? I have the same Problem and dont know how to solve the issue
Last updated: 2023-08-21

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