Post by poliautomacao on Absolute movement controlled by an external encoder. ^{CODESYS Forge talk (Post)}
Georg, the encoder's actual position was -208 because I moved it manually for testing, but I managed to get it working. Your information is correct; there was a parameter error, Kp was at 0. After I adjusted it, it responded as expected. Thank you very much for your help.
Last updated: 2026-04-02

Post by petra on Gateway not configured properly when read_online_value ^{CODESYS Forge talk (Post)}
Here is what I use to read online the parameter value. proj = projects.primary app = proj.active_application plc = proj.find("Device", True)[0] onlineapp = online.create_online_application(app) onlineapp.login(OnlineChangeOption.Try, True) dev1 = proj.find("DEV1", True)[0] for conn in dev1.connectors: > parms = conn.host_parameters > if len(parms) > 0: > p = parms.by_id(1074855985) > p.read_online_value(2000) ---> error: Gateway not configured properly
Last updated: 2026-06-12

Post by petra on Gateway not configured properly when read_online_value ^{CODESYS Forge talk (Post)}
Here is what I use to read online the parameter value. proj = projects.primary app = proj.active_application plc = proj.find("Device", True)[0] onlineapp = online.create_online_application(app) onlineapp.login(OnlineChangeOption.Try, True) dev1 = proj.find("DEV1", True)[0] for conn in dev1.connectors: > parms = conn.host_parameters > if len(parms) > 0: > p = parms.by_id(1074855985) > p.read_online_value(2000) ---> error: Gateway not configured properly Does anyone know about this?
Last updated: 2026-06-12

Post by yoeri on Python Scripted Save_Archive with noUI ^{CODESYS Forge talk (Post)}
Is there any update on this? Running codesys 3.5.19.70 proj = projects.open(project_path, primary=True, update_flags=flags) This gives an error only when using --noUI exception System.NullReferenceException: Traceback (most recent call last): File "C:\Project\ci\build.py", line 14, in <module> SystemError: Object reference not set to an instance of an object. Exit code: 1</module>
Last updated: 2026-01-30

Post by mait-tim on Unknown Type ^{CODESYS Forge talk (Post)}
Hello, Im working with EPEC PLC's and working on the HMI and i'm running into the following errors: Unknown Type ISOImages.TargetContainer.TDS (and similars) I cannot locate the error and the source position is the visutalisation manager where i cannot find anything related to this type. Im working with: Codesys V3.5 SP18 patch 3 and i cannot update since the hardware does not allow for newer SP versions
Last updated: 2026-04-03

Post by buczekj on ERROR: Calling the program "AlarmStorage_Prg" is not allowed from multiple tasks ^{CODESYS Forge talk (Post)}
Many issues with the alarmmanager and alarmstorage can be solved by deleting the configuration, rebooting, and redownloading. I've found that the configurator doesn't always update when you make chanegs. For linux installations it is typically located in /var/opt/codesys/PlcLogic/alarms/ look for file Application.AlarmConfiguration.xml cd /var/opt/codesys/PlcLogic sudo rm -r alarms sudo reboot
Last updated: 2026-04-09

Post by dmb-fan on Attemp Convert old V2.3 projects : Error HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) ^{CODESYS Forge talk (Post)}
I try Sandbox. Now I get messages like "Converter is on the blacklist for this version". Online help says nothing about a too high version for the converter. How I can find out the allowed version? Or is this only for sandboxes? what a jungle !
Last updated: 2026-08-11

Post by ofey on Codesys Soft PLC OPC UA server ^{CODESYS Forge talk (Post)}
Hi! I'm sorry if this has been asked before. I have tried looking up previous topics regaring this, but even though I'm following tutorials and other posts I cant seem to get this to work consistently. I actually got the connection established on a test project after some trial and error. I only got it to work with the "Anonymous login". But after i deleted the test project and tried to get the same thing to work on another project I cant get it to work anymore. What I'm trying to do: Set up and OPC UA Server using CODESYS with the free soft PLC. I then try to connect to the OPC UA Server with the program "UaExpert". What happens: I get the error Error "'BadUserAccessDenied' was returned during ActivateSession". What I have done in CODESYS: - Added the object "Symbol configuration" and checked some test variables - Checked "Support OPC UA features - In "Communication settings -> device -> Change runtime security policy" I have checked "Allow anonymous login" What I have done in UAExpert: - Found the OPC UA server under "local". (It is showing two servers though, I do not know why. It showed the same when it worked yesterday). Se attachment - Checked "Anonymous" under "Authentication settings in the OPC UA server. I'm new to CODESYS, so it could be something elementary wrong in my settings. Maybe something in the user settings in CODESYS regarding user rights or something?
Last updated: 2023-09-14

Post by jmfernandes on OpenDir always in error ^{CODESYS Forge talk (Post)}
Hello I'm trying to use DirOpen to access a directory where then I can read/list the files inside. But I can't list any files because DirOpen.xError is always true. In eError the message is this: " ERROR_UNKNOWN Local library error ID (0: no error; 5101: time out)**** " I have in the file explorer the path 'C:\CodesysTest\Aluminium' and to make sure I also created in the plc a folder to 'prj/Recipes/Aluminium'. I tried using the different paths, but in both it happens the same thing.Inside the folder Aluminium there is two csv files, that I want to list. I added in the library manager CAA Files and CAA Types. I am using the example of https://content.helpme-codesys.com/en/libs/CAA%20File/Current/Examples.html#directory but not matter what I do, I can't get the list the names of the files. What am I missing?
Last updated: 2024-07-31

Post by sean-barton on Ambiguous namespace in library dependencies ^{CODESYS Forge talk (Post)}
I am trying to install the MQTT Client SL in an existing project I have been working on for years. After adding the library to the project, and without adding any other code, upon building I get a C0180: Ambiguous namespace 'MBM' error between the memory block manager (MBM) in the NetBaseSrv dependency of the MQTT Client SL library and the memory block manager (MBM) in the CAA CanL2 dependency of the 3S CANopen stack library. I have tried: * setting "Only allow qualified access to all identifiers." in the properties for both the parent libraries. * deleting the 3S CANopen stack library. Upon (re)building the error simply points to another conflicting library - there are many. * deleting the Library Manager and rebuilding it. * adding the memory block manager library (used in the NetBaseSrv) manually and changing its namespace to MBM3S. None of the above allow me to access the MQTT library through its namespace (MQTT). Adding the memory block manager manually removes the C0180 error, but the MQTT library is not accessible - i.e. mqttClient : MQTT.MQTTClient; highlights the mqttClient as "Identifier 'MQTT.MQTTClient' not defined". Is there anything else I can try?
Last updated: 2025-01-09

Post by pernockham on Persistence Manager: Config File not found? ^{CODESYS Forge talk (Post)}
Back in november I paused this, but wanted to reattempt using the persistent manager, the behavior is still the same. Most "login attempts" s are stopped with the message "One or more errors occurred" but I have no idea what that error might be. The only clue is this message is presented while the lower left status box says "Generating code...: relocation pou". For clarification. Build/Generate code is successful, no errors. Error appears when I try to download/login (physical or simulation) to a device. I did manage to login (in simulation mode) at one point, but then the error message "PersistenceChannel: Config file not found!". And no persistence files were created. I have done device-tree/reset-orgin also clean/clean all etc. Removed/re-inserted persistance manager. Behaviour is just the same. Removing Persistence Manage and everything is working OK. Is there possibly more info somewhere about the "One or more errors occured"-message?
Last updated: 2025-03-20

Post by imdatatas on MC_MoveAbsolute: C0138: No matching 'FB_Init' method found for instantiation of SMC_MoveAbsRelPerformerImpl [ERROR] ^{CODESYS Forge talk (Post)}
Dear @gseidel, Thank you for your reply. The exact version of Codesys and its compiler was 3.5.21.20. The compiler version was fixed and could not be changed in project settings. Since I couldn't continue due to this compilation error, I temporarily overcame this issue as follows. -- I completely uninstalled Codesys 3.5.21.20 and completely deleted the Codesys folder in the C:\ProgramData folder. -- I restarted my computer and installed Codesys 3.5.19.70. -- I updated the Codesys Installer and all its add-ons to the latest versions. -- The project that was giving me the compilation error I mentioned before is now open with Codesys 3.5.19.70, compiled it, and successfully downloaded it on the device. -- I haven't encountered the same problem anymore. I think this issue is related to SP21 and its compiler. Frankly, I'd expect a project created with an older version to compile without errors after opening it with the latest Codesys version and updating all libraries. Regards, imdatatas
Last updated: 2025-09-26

Post by mavitia on Application based license problem - Modbus TCP ^{CODESYS Forge talk (Post)}
I am running ubuntu on a raspberry pi, and installed an application based license Control Basic M on it, it runs a demo program fine, does not timeout etc. however, when I add a modbus TCP device, I start getting errors: <Entry severity="error" component="CmpApp" user="nobody" timestamp="12/18/2023 3:49:42 PM" infoId="24">Online change denied. Application Application is in exception state!</Entry> <Entry severity="error" component="CmpApp" user="nobody" timestamp="12/18/2023 3:49:42 PM" infoId="68">Download failed: Application=Application</Entry> <Entry severity="exception" component="CmpApp" user="nobody" timestamp="12/18/2023 3:49:41 PM" infoId="0">Application app=Application has invalid license metrics!</Entry> the modbus tcp slave runs, and the counter ticks up, however, when I call the variables on the %IX0.0 in my program, and try to upload the changes, I am getting the error messages which stop the program as far as I understand, the application based, M includes 2 fieldbus instances, but on the other side is fairly new, anything obvious I am missing out here?
Last updated: 2023-12-18

Post by levih on DocScripting ^{CODESYS Forge talk (Post)}
Hello I'm trying to use the DocScripting collection in Codesys. I've made it work on one PC(1) for the 3.5.16.4 version of the script collection. But when I try the same setup on another PC(2), I get an error message: Error loading Python DLL: D:\SCRIPTING\3.5.16.40\python27.dll (error code 14001) My setup on both PC's is thus: 1. Downloaded and installed Python 2. Copied the folder with the scripting collection to C: (because of admin rights) 3. Placed my .library file in the same folder as the scripting collection Only difference is that Python is v3.12.0 on PC1 and v3.12.1 on PC2. I thought maybe it was something with Python, but then I have tried using the scripting collection from 3.5.16.1, and that seems to work. Just not for scripting collection 3.5.16.4. I also can't seem to find any scripting collections on newer versions of Codesys? (e.g. 3.5.19.10) Thanks in advance!
Last updated: 2024-01-22

Post by tomast on Codesys and Siemens SINAMICS 20 modbus RTU "Response CRC Fail" ^{CODESYS Forge talk (Post)}
Hi everyone, I'm currently working on a project involving the control of 5 VFDs via Modbus RTU, this time using the WAGO 750-8212 CPU. So far, I've managed to make progress, but I've encountered an issue. While I can successfully read and write to all the registers I need, I consistently encounter a "Response CRC Fail" error when attempting to write the value 1151 to the STW register at address 40100. I'm able to set the frequency via register 40101 and adjust all other parameters using different registers. Setting STW to 1150 results in the drive ready boolean from the ZSW-bit being received instantly. However, the moment I attempt to send 1151 to register 40100, I immediately receive the "Response CRC Fail" error for all channels. I've also attempted to use combined control, employing Modbus for frequency control and starting from a digital input. Everything seems to function properly until I send the start command to the VFD. Interestingly, I consistently encounter the same error the moment I send the start command, regardless of whether I use register 40006 (high) or 40100 (1151). Could someone please assist me in resolving this issue?
Last updated: 2024-03-21

Post by rabaggett on CODESYS control for Raspberry Pi 64 SL errors ^{CODESYS Forge talk (Post)}
Hi, I am trying to create a project using a raspberry pi, I have added the modules for the Pi and MCP3008. I have encountered som errors that I don't know how to track down. 1. The GPIOs give preprocessor errors, but I read that this does not prevent compiling. This seems to be true. I can build the empty project with no errors. 2. After adding a SPI master and MCP3008, the preprocessor errors double, but seem similar and the project again builds with no errors. 3. I add a DUT and GVL, with a function, and I get the following errors. They remain even if I delete these things. ------ Build started: Application: Device.Application ------- Typify code... [ERROR] crr: C0032: Cannot convert type 'Unknown type: 'ADR(GVL_Io_17160064_c083_41f8_9e53_208be7537753_HPS_7.Io_17160064_c083_41f8_9e53_208be7537753_HPS_7)'' to type 'POINTER TO IoConfigParameter' [ERROR] crr: C0077: Unknown type: 'GVL_Io_17160064_c083_41f8_9e53_208be7537753_HPS_7.Io_17160064_c083_41f8_9e53_208be7537753_HPS_7' [ERROR] crr: C0046: Identifier 'GVL_Io_17160064_c083_41f8_9e53_208be7537753_HPS_7' not defined Compile complete -- 3 errors, 0 warnings I attach the project. What am I doing wrong? Thanks!
Last updated: 2024-05-02

Post by nikgind on Codesys Communication Manger - Required information model version exists in the model repository but is not found ^{CODESYS Forge talk (Post)}
Hi I am trying to import a custom information model that I created using UA Modeler. I have only added two new methods and two new object types. It is possible to add the information model to the Communication Manager and the two new object types are shown in the Information Model tab. After compiling i get the following error: Communication Manager [Device: PLC Logic: Application]: The information model http://opcfoundation.org/UA/ is required by http://yourorganisation.org/Bsp_3.1/ with a minimal publication date from 15.12.2023 but the device has only a model from 15.09.2021 installed. Probably the information model from 15.09.2021 is missing in the information model repository. The error message does not make sense to me. Should it not be “Probably the information model from 15/12/2023 is missing in the information model repository”? Anyway I have installed the information model from 15/12/2023 but not from 15/09/2021. Which makes the error message even stranger.
Last updated: 2024-06-09

Post by rk-gaw on Unhandled exception and refactoring error ^{CODESYS Forge talk (Post)}
Hello everyone. I hope this is the right place to ask for help, this error is causing me a great amount of time loss and I really would like to end this nightmare. I don't know why but at times if I try to Browse -> Display Cross Reference on a variable Codesys just crashes. I'll attach the file with the complete crash report hoping someone can figure why it happend. I think that the unhandled exception comes from the PersisranceManager Module and is connected with the other big problem I'm facing: I cannot refactor in my project, if I'll try to refactor a POU name the whole POU will become "frozen", it's like its desynchronizing from the project and the project cannot find the pointer to the POU once I refactor it. And when I open the project a warning pop-up will show up with the frozen POUs name, but I cannot figure out what the warning is telling me. I'll attach every warning and error pop up the project is showing me, and thanks in advance to anyone who can figure something out.
Last updated: 2025-12-10

Post by ryusoup on JSONByteArrayWriter problem? ^{CODESYS Forge talk (Post)}
Hello, I am trying to implement a FB to make JSON formatted WSTRING type message using JSON Utilities 1.9.0.0 included in the IIoT library. In my case, I want to set some objects or arrays and set values to them later. But when I wrote as the sample below, // init builder builder(pJsonData:=pJsonData, diRootObj=>diRootObj); // set the 1st key to root diKey1 := builder.SetKeyWithArray(wsKey:="key1", diParentIndex:=diRootObj, eError=>eError); // set a value to the 1st key wsValue:="value01"; builder.SetValue(Value:=wsValue, diParentIndex:=diKey1, eError=>eError); // set the 2nd key to root diKey2 := builder.SetKeyWithArray(wsKey:="key2", diParentIndex:=diRootObj, eError=>eError); // set a value to the 2nd key wsValue:="value02"; builder.SetValue(Value:=wsValue, diParentIndex:=diKey2, eError=>eError); // set a value to the 1st key again wsValue:="value03"; builder.SetValue(Value:=wsValue, diParentIndex:=diKey1, eError=>eError); // set a value to the 2nd key again wsValue:="value04"; builder.SetValue(Value:=wsValue, diParentIndex:=diKey2, eError=>eError); // write build result writer(xExecute:=TRUE, pwData:=ADR(wsResult), udiSize:=SIZEOF(wsResult), xAsyncMode:=FALSE, jsonData:=pJsonData^); the result was: { "key1": ["value01"], "key2": ["value02", "value03", "value04"] } while my expection was: { "key1": ["value01", "value03"], "key2": ["value02", "value04"] } Inspecting pJsonData^, JSONData itself seems to be ok, so I believe the issue is something caused by the writer FB. Does anyone know how to fix it? Thanks,
Last updated: 2023-10-04

Post by nz-dave on MC_HOMING ^{CODESYS Forge talk (Post)}
Hi Just new to motion and i am building my own 3axis cnc cutter using servo drives. i have every thing working quite well apart from mc_home. when executed (r_trig) it stops immediately and i get fb_wasnt_called_during_motion. if i execute the mc_home fb with a toggle it just runs and runs for a while then errors out. what im unsure of is the way mc_home works. from what i understand it changes the drive mode to 6 (homing) and should then run of the drive homing settings. once origin sensor is made then homing would stop and mc_home.done is true. and the position on the fb is where i what the new home position (zero) to be? or do i feed mc_readposition to that input? so i would think its the settings in the drive that aren't quite right. but i believe they are all correct. has any one got any info to steer me in the right direction? Cheers
Last updated: 2025-04-04

Post by timvh on Active alarm access in ST ^{CODESYS Forge talk (Post)}
See https://forge.codesys.com/forge/talk/Engineering/thread/280fdf4806/#9fe5 And https://forge.codesys.com/prj/codesys-example/alarm-manager/home/Home/ The application should contain: - an FB which implements AlarmManager.IAlarmFilterCriteria (see example - FB_AlarmFilterCriteria) - an FB which implements AlarmManager.IAlarmManagerClient (see example - FB_AlarmManagerClient) Then register the client and get the information through this client. VAR xInit : BOOL := TRUE; udiResult : UDINT; fbAlarmFilterCriteriaAll : FB_AlarmFilterCriteria; fbAlarmManagerClientAll : FB_AlarmManagerClient; itfAlarmManagerClientAll : IAlarmManagerClient := fbAlarmManagerClientAll; xAlarm1 : BOOL; xAlarm2 : BOOL; xWarning : BOOL; iNrOfAlarmsInAlarmList : INT; iNrOfActiveAlarmsInAlarmList : INT; paitfAlarm: POINTER TO ARRAY [0..0] OF AlarmManager.IAlarm; iAlarmIndex : INT; eAlarmState: AlarmManager.AlarmState; END_VAR IF xInit THEN xInit := FALSE; fbAlarmManagerClientAll.m_itfAlarmFilterCriteria := fbAlarmFilterCriteriaAll; // register alarm client to get updated about alarm status / changes udiResult := AlarmManager.g_AlarmHandler.RegisterClient(itfAlarmManagerClientAll, 0, 0); END_IF // Polling the number of alarms udiResult := AlarmManager.g_AlarmHandler.GetActiveAlarms(itfAlarmManagerClientAll, parritfActiveAlarms => paitfAlarm, iCountActiveAlarms => iNrOfAlarmsInAlarmList); iAlarmIndex := 0; iNrOfActiveAlarmsInAlarmList := 0; WHILE iAlarmIndex < iNrOfAlarmsInAlarmList DO eAlarmState := paitfAlarm^[iAlarmIndex].GetState(); IF eAlarmState = AlarmManager.AlarmState.Active OR eAlarmState = AlarmManager.AlarmState.ActiveAcknowledged THEN iNrOfActiveAlarmsInAlarmList := iNrOfActiveAlarmsInAlarmList + 1; END_IF iAlarmIndex := iAlarmIndex + 1; END_WHILE
Last updated: 2025-04-23

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

Post by nz-dave on Bool turning on in case stament in wrong state? ^{CODESYS Forge talk (Post)}
I had the FB called via a for loop to call a few instances of my FB I have removed it the for loop and just called them 1 by 1. Seems to have sorted the problem. tho, i have other FB's and for loops doing the same thing but they are all fine. below is basically what was happening. var: mVibrator : ARRAY[1..GVL_Settings.Number_Of_Products] OF Main_Vibrator; end_var Controller(PRG) call: FOR v := 1 TO GVL_Settings.Number_Of_Products BY 1 DO; mVibrator[v] (); END_FOR So at state 30: the mVibrator[1].start was turning on 30: Main_Mixer.Start := TRUE; Process_State := 2; IF Main_mixer.Done THEN Main_Mixer.Start := FALSE; Control_State := 40; END_IF but its not till state 50: that it is actual in the code. 50: Main_Suction_valve.Open_Input := TRUE; mVibrator[1].Start := TRUE; Process_State := 4; IF GVL_Weigh_hopper.LoadCell_Weight = 0 THEN Main_Suction_valve.Open_Input := FALSE; mVibrator1.Start := FALSE; Control_State := 60; END_IF Thanks for your input.
Last updated: 2023-12-16

Post by leafy on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
Hey there! I am currently doing a little automation project for uni. I am trying to integrate a control-valve-system (Buerkert AirLINE Field) in my IO-Link environment. With IFM sensors, I used their pre-built function blocks, but with this third-party device, i need to write my own function block. Thankfully, IFM provides a generic sensor-fb so I can write my own FB with "extends" and "super". So far, so good. I found the IODD and some other documentation and I thought I get how it works, but somehow can't really get it to work at all. From my understanding, i need to write data into the PDO-Array. But i get confused with the indices and subindices of IO-Link. I'll append the IODD and some screenshots of my project. There is an AOI for LogicXDesigner, but I can't use that in Codesys. I hope someone has integrated a IOL-device in Codesys before and can help me with this. Cheers leafy
Last updated: 2024-04-16

Post by leafy on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
Hey there! I am currently doing a little automation project for uni. I am trying to integrate a control-valve-system (Buerkert AirLINE Field) in my IO-Link environment. With IFM sensors, I used their pre-built function blocks, but with this third-party device, i need to write my own function block. Thankfully, IFM provides a generic sensor-fb so I can write my own FB with "extends" and "super". So far, so good. I found the IODD and some other documentation and I thought I get how it works, but somehow can't really get it to work at all. From my understanding, i need to write data into the PDO-Array. But i get confused with the indices and subindices of IO-Link. I'll append the IODD and some screenshots of my project. There is an AOI for LogicXDesigner, but I can't use that in Codesys. I hope someone has integrated a IOL-device in Codesys before and can help me with this. Cheers leafy
Last updated: 2024-04-16

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