Post by timvh on CODESYS: Combining Master Redundancy with EtherCAT Ring Topology – Is it Supported? ^{CODESYS Forge talk (Post)}
Yes, this works (at least we have it running with Wago PLC and Beckhoff I/O), but the concept works. You need 2 PLC's with at leat 3 network interfaces. And 2 switches (can be unmanaged). See the attached simple diagram for the solution.
Last updated: 2026-02-05

Post by mrkm-dic on CODESYS: Combining Master Redundancy with EtherCAT Ring Topology – Is it Supported? ^{CODESYS Forge talk (Post)}
Hi! thanks for reply. We tested the configuration you proposed as well; however, when the cable between the controller and the switch was disconnected, the Active and Standby roles were swapped. Did you observe the same behavior in your configuration using WAGO and Beckhoff?
Last updated: 2026-02-06

Post by gatto on EXCEPTION [watchdog] how to find position cause ^{CODESYS Forge talk (Post)}
hi. My plc is weidmuller UC20-WL200-AC, IDE CODESYS 3.5.20.40, see picture for task settings. sometime i've got the plc stop. Reading the log, I find: EXCEPTIONPOSITION : IP=0x(nil) (no IECcontext could be retrieved) component CmpIecTask EXCEPTION [Watchdog] occurred: App=[Application], Task=[TASK_O_MAIN] component CmpIecTask How to find the position of problem?
Last updated: 2026-02-06

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 reinier-geers on API webclient ^{CODESYS Forge talk (Post)}
Fur ein jahr ein webclient lisence gekauft. Aber immer funktioniert es noch nich. Mach ik es auf internet bekomme ich daten. Aber mit codesys bekomme ich - Query fehler ... - ein switch die abschalt - oder den controller hangt mal wieder Hat eine dar erfahrung? Kan ich in den FB sehen was da pasiert ?
Last updated: 2026-04-05

Post by reinier-geers on Virtual Api to vieuw what im sending ^{CODESYS Forge talk (Post)}
Hi. Is there a website to test my webclient ? When i do a web api test on internet it works. But with codesys ill get an error. So is there a website to tests what im sending ? or a way to look in to the Codeys FB Webclient ?
Last updated: 2026-04-05

Post by reinier-geers on Virtual Api to vieuw what im sending ^{CODESYS Forge talk (Post)}
Hi. Is there a website to test my webclient ? When i do a web api test on internet it works. But with codesys ill get an error. So is there a website to tests what im sending ? or a way to look in to the Codeys FB Webclient ?
Last updated: 2026-04-05

Post by nulltrace on Modbus TCP Server connection is ESTABLISHED but all holding registers are value 0? ^{CODESYS Forge talk (Post)}
it works pretty well on codesys-version using device-tree and channels. heres the twist: each uid should be represented as a device, which in your case, it isn't. on the other hand, you found a solution which already works fine. Happy Modbus'ing
Last updated: 2026-04-09

Post by polo on Modelbau-Servos über I2C-Bus und Adafruit PWM ^{CODESYS Forge talk (Post)}
Hallo, ich müsste alrMin von 1 auf 0.1 und alrMax von 2 auf 9 ändern ... im Programm von Codesys funktioniert aktuell nur die Änderung des alrPWM ... den kann ich von 0 auf 0.5 beim Start setzen lassen . Wie kann ich also alrMin und Max auch beim Start ... oder fest in den Grundeinstellungen ändern?
Last updated: 2026-04-18

Post by nguyenbao on file library ifm CR2033 .lib in the CODESYS v2.3 ^{CODESYS Forge talk (Post)}
Hello everyone, I have a program file that uses the CR2033 module of iFM. I noticed that the program uses the CR2033 function, but in the CodeSystem software I installed from the file downloaded from iFM, I couldn't find the library containing this function. Where can I find the CR2033_XX.lib library?
Last updated: 2026-04-22

Post by yr00 on OPC UA datasource low read frequency ^{CODESYS Forge talk (Post)}
Hello everyone, I am trying to test the OPC UA client feature in Codesys. My setup is the following; I have a Codesys simulation/ visualization running on Control Win V3. My OPC UA server is hosted on a Siemens 1518 PLC using PLCSim Advanced. The setup is completely virtual so there are no really PLCs. Everything is on my laptop. Writing data from the Codesys simualtion to the server is very quick. I have a PLC program running on another 1500 PLC which reads data from simulation via the server, and changes in the simulation (e.g. button pressed) appear within hundreds of miliseconds if not tens of miliseconds in my PLC program. However, when it comes to reading data from the OPC UA Server by Codesys, it taks around 1-2s. I connected a UAExpert client and it gets update very quickly so I am fairly sure the problem is with Codesys. I have tried changing the update rate in datasource -> General and Diagnosis, but it doesn't seem to have an effect. Do you guys have any suggestion on what I can do?
Last updated: 2023-08-29

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 ahuckphin on Issues with Modbus Slave with Raspberry Pi ^{CODESYS Forge talk (Post)}
I have a DFRobot RS485 temperature & humidity sensor (SEN0438) connected to my Raspberry Pi via a USB to RS485 adapter. I am able to connect and read the sensor data when running a python code locally. However in Codesys, I encounter this error "A bus error has occurred." and "There was no response in time". Could this be because of Modbus Server Channel and Modbus Server Init configuration on my part? Admittedly I am new to Codesys. To get to this stage, I: 1. added some lines to CODESYSControl_User.cfg 2. added "Modbus_COM" in Codesys and set "Serial Port Configuration" under "General" 3. added "Modbus_Master_COM_Port" in Codesys and checked transmission mode is set to "RTU" 4. added "Modbus_Slave_COM_Port" in Codesys and checked server address is set to 1 (also set 1 in my sensor) 5. added 1 channel and 1 init for "Modbus_Slave_COM_Port" under "Modbus Server Channel" and "Modbus Server Init"
Last updated: 2024-07-10

Post by cihangur on OpC UA server on Raspberry Pi 64 SL runtime ^{CODESYS Forge talk (Post)}
Hello everyone, I wanted to write here because it is a similar and the most up-to-date topic. I want to connect to CoDeSys Win V3 x64 - 3.5.19.50 with OPC UA using WinCC Advanced V17. (Or to a PLC with CoDeSys Version 4.10.0.0) My settings are exactly the same as the previous comment. I even tried many different settings. I can access all CoDeSys OPC UA variables via TIA Portal IDE and add them to my HMI tags. When WinCC RT Advanced is started, it gives a warning that the connection could not be established and does not update the variables. I can connect to Inovance AM600 using CoDeSys Target version 3.5.11.50. (The same version Win x64 is also connected.) However, a security setting in the current versions prevents me. I would be very happy if those who have up-to-date experience on this issue and find a solution share it. The CoDeSys Security Settings which I can access variables with TIA Portal: CommunicationPolicy: POLICY_BASICSHA256SHA256 CommunicationMode: ALL Activation: Activated UserAuthentication: ENABLED Server Certificate: Valid until 2034 Greetings.
Last updated: 2024-12-06

Post by jakubmphoenix on EtherCAT Master on RaspberryPi with EtherCAT Slave on Beckhoff ^{CODESYS Forge talk (Post)}
Hello everyone, I’m currently working on setting up an EtherCAT Master using CODESYS on a Raspberry Pi, and I’ve run into some issues I could use help with. Project Setup: EtherCAT Master: Raspberry Pi with CODESYS Control for Raspberry Pi 64 SL installed EtherCAT Slave: Beckhoff CX5130 with EK1200 coupler I/O Module: EL2008 License Module: EL6070-0033 I’ve installed the required CODESYS packages and the Linux gateway on the Raspberry Pi. In my project, I added the EtherCAT Master with the appropriate port settings and scanned for devices. The CX5130 shows up as a slave, but communication fails—I'm getting error messages and can't access the outputs. Specifically: The EL2008 output module isn’t recognized properly in CODESYS. There’s no option to communicate with it through the CX5130. I’ve tried connecting via both the Raspberry Pi’s built-in Ethernet port and an external network card. I've attached screenshots showing the errors I get in CODESYS and the devices detected via TwinCAT for reference. Any help or suggestions would be greatly appreciated! Thanks in advance! EMERGENCY FROM DEVICE 1001 ERROR CODE 16#A000 Error register 16#02 Error field: 16#02 Error field : 16#0E 16#04 16#00 16#04 16#00
Last updated: 2025-07-16

Post by gunstr on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge talk (Post)}
We have been using the Codesys Control for Rasberry Pi for several years in many installations without any major issues. But during summer the problem mentioned above has blocked further deliveries. We have made some minor upgrades to the application but I do not really see why that should have any impact. HW is Raspberry Pi 4B, 2GB OS is Booworm Lite Codesys control is version 4.15 (have just installed a few systems lately with this version) The system boots OK but after exactly 30 seconds Codesys is shut down and becomes unreachable. We have tested several different combinations: Upgrade of the Codeys Control to 4.16 Loading different Codesys applications Changing to 4GB version of the Raspberry Pi One of the test applications together with the 4GB HW seems to be stable, but all other combinations fails. Any suggestion what we can do to resolve is appreciated - this is a real business blocker now. Rgds
Last updated: 2025-09-02

Post by ranadheer on Codesys Control for PLCnext (PLC - AXL F 2152) ^{CODESYS Forge talk (Post)}
Hello Jaco Pretorius, I came across your post regarding CodeSys control for PLCnext. I’m currently working on a similar setup and had a quick question. Here am using the CODESYS V3.5 SP21 PATCH2 ,VERSION 3.5.21.20 , and Downloaded extension package 4.16.0.0 (old versions are not available in the extension CodeSys installer) Devices used here are: BUS COUPLER : 2403869 BK PN TPS Module carrier slot 1 : 1088127 AXL SE DI16/1 Module carrier slot 2 : 1088062 AXL SE AI4 | 4-20 Module carrier slot 3 : 1088129 AXL SE DO16/1 Module carrier slot 4 : 1088123 AXL SE AO4 | 4-20 -->Start a New Project Type: Standard Project Device: CODESYS Control Win V3 x64 Language: Structured Text -->Install GSDML File Navigate to: Tools > Device Repository > Install Select the GSDML file path (downloaded from Phoenix Contact for device coupler Part ID: BK PN TPS 2403869) Click Renew Device Repository Close the dialog -->Add Device to Project -->Right-click on Devices > Add Device Issue: Devices from the repository are not available to select or call into the project! I’d really appreciate any guidance or suggestions you can offer. Best Regards Ranadheer Reddy
Last updated: 2025-09-09

Post by ranadheer on Codesys Control for PLCnext (PLC - AXL F 2152) ^{CODESYS Forge talk (Post)}
Hello Jaco Pretorius, I came across your post regarding CodeSys control for PLCnext. I’m currently working on a similar setup and had a quick question. Here am using the CODESYS V3.5 SP21 PATCH2 ,VERSION 3.5.21.20 , and Downloaded extension package 4.16.0.0 (old versions are not available in the extension CodeSys installer) Devices used here are: BUS COUPLER : 2403869 BK PN TPS Module carrier slot 1 : 1088127 AXL SE DI16/1 Module carrier slot 2 : 1088062 AXL SE AI4 | 4-20 Module carrier slot 3 : 1088129 AXL SE DO16/1 Module carrier slot 4 : 1088123 AXL SE AO4 | 4-20 -->Start a New Project Type: Standard Project Device: CODESYS Control Win V3 x64 Language: Structured Text -->Install GSDML File Navigate to: Tools > Device Repository > Install Select the GSDML file path (downloaded from Phoenix Contact for device coupler Part ID: BK PN TPS 2403869) Click Renew Device Repository Close the dialog -->Add Device to Project -->Right-click on Devices > Add Device Issue: Devices from the repository are not available to select or call into the project! I’d really appreciate any guidance or suggestions you can offer. Best Regards Ranadheer Reddy
Last updated: 2025-09-09

Post by willbechel on Errors about PLC configuration in CoDeSYs software ^{CODESYS Forge talk (Post)}
I saved it as the same project but in a different location. I opened this "new project". I clicked on the "Direct Login from Automation Builder" button. It automatically directed me to CODESYS, where I was able to create the "Create Boot Project" but first I also clicked login again but inside CODESYS keeping the automation builder login online. Additional Information: The "Create Boot Project" function in CODESYS is used to create a project that will automatically start when the controller is booted up. To create a boot project, you must first create a new project in CODESYS. Once you have created a new project, you can then use the "Create Boot Project" function to create a boot application. The "Create Boot Project" function will create a new application that is based on the current project. The new application will be saved in the same location as the current project. You can then download the new application to the controller.
Last updated: 2024-02-01

Post by willbechel on Project Login Problem ^{CODESYS Forge talk (Post)}
I saved it as the same project but in a different location. I opened this "new project". I clicked on the "Direct Login from Automation Builder" button. It automatically directed me to CODESYS, where I was able to create the "Create Boot Project" but first I also clicked login again but inside CODESYS keeping the automation builder login online. Additional Information: The "Create Boot Project" function in CODESYS is used to create a project that will automatically start when the controller is booted up. To create a boot project, you must first create a new project in CODESYS. Once you have created a new project, you can then use the "Create Boot Project" function to create a boot application. The "Create Boot Project" function will create a new application that is based on the current project. The new application will be saved in the same location as the current project. You can then download the new application to the controller.
Last updated: 2024-02-01

Post by timl on BacNet "Unaufgelöste Referenz" ^{CODESYS Forge talk (Post)}
Hallo, ich habe Probleme beim nachbauen des BacNet2 Tutorials "Erste Schritte" aus der CODESYS Online Help. https://content.helpme-codesys.com/de/CODESYS%20BACnet/_bacnet_first_steps.html Das Anlegen des BacNet2 Servers und der danach folgenden BacNet Datenpunkte erfolgt ohne Probleme. Der Code lässt sich mit F11 auch Fehlerfrei generieren. Beim Download auf die SPS tritt dann der Fehler auf dem Bild auf. Anbei auch ein Bild des Logs nach dem Download. CODESYS BACnet 2.0.0.0 ist über den Installer runtergeladen. Device: CODESYS Control Win V3 x64 Version 3.5.19.40 CODESYS 3.5.19.40 Im Bibliotheksverwalter ist BACnet2 2.0.0.0 aufgeführt Die Konfigurationsdatei habe ich mit folgenden anpassungen abgespeichert: [ComponentManager] Component.1=CmpTargetVisuStub Component.2=CmpWebServer Component.3=CmpWebServerHandlerV3 Component.4=SysCpuMultiCore Component.5=SysReadWriteLock Component.6=SysCpuBreakpoints Component.7=SysPipeWindows ;Component.8=CmpHilscherCIFX ;Component.9=CmpPCANBasicDrv ;Component.10=CmpCANFoxDrv ;Component.11=CmpIxxatCANDrv ;Component.12=CmpBlkDrvCanServer ;Component.13=CmpBACnet Component.14=CmpBACnet2 [CmpBACnet2] ;configuration file of the BACnet stack IniFile=$PlcLogic$/bacstac2.ini ;task priority of the BACstack process task, default: TASKPRIO_NORMAL_END (159) TaskPrio=128 ;name of the named pipe for the communication with the BACstack AppName=/tmp/BACnetServer Habe ich etwas vergessen?
Last updated: 2024-02-16

Post by timvh on Toradex and CODESYS and licensing ^{CODESYS Forge talk (Post)}
For the Virtual Control you need to use a "Network license". The Virtual Control has parameters of which one is the reference to the license server. This can be the device itself, but you need to activate the license on the host system (not in the container). For this, CODESYS has a Network License server with WBM (web based management). See for the Network License configuration: https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_license_controller_linux.html If it is only for evaluation, I would advise to use a CODESYS (USB) key and activate the license on the key. Then you still have to install the CODESYS Network License server on the host, but you don't have to activate the license as soft license on the device. The benefit is that you can easily move your license to another device when needed. Off course your device must have a free USB port available to be able to do this.
Last updated: 2025-10-20

Post by tjacks on Opc UA Data Source Client Browse Error in Codesys HMI ^{CODESYS Forge talk (Post)}
Codesys V3.5 SP21 Patch 3 Codesys HMI 3.5.21.30 I'm trying to connect to an OPC UA server on a Kuka robot controller using Codesys HMI's data source manager. I get through the login phase and the client browses most of the data structure on the server but errors out toward the end with a generic: Error while browsing the client, Failed with service result: BadUnexpectedError. If I complete the data source setup and try to update variables, I get the attached stack trace for the error. I've tried several different endpoint and security options. Most get me through the login but all error out while browsing. UA Expert happily connects and browses with the same configuration. I've connected this same version of Codesys to TwinCAT OPC UA servers and Siemens PLC OPC UA servers. Any ideas on what may be causing the generic BadUnexpectedError during OPC UA server browse?
Last updated: 2025-11-17

Post by mohammedben on Fail communication between CODESYS and Fuxa SCADA via OPC UA ^{CODESYS Forge talk (Post)}
hi, When I try to establish communication between CODESYS and Fuxa SCADA via OPC UA, the connection fails, and I receive the following error: 2026-02-15T08:38:13.618Z [ERR] 'codesys' connect failure! Error: The connection may have been rejected by server, Err = (ClientTCP_transport6: socket has been disconnected by third party) 2026-02-15T08:38:13.619Z [ERR] 'codesys' try to connect error! Error: The connection may have been rejected by server, Err = (ClientTCP_transport6: socket has been disconnected by third party) 2026-02-15T08:38:13.622Z [ERR] 'codesys' connect error! undefined (1) Note that there are no problems when I establish communication with the UaExpert and OPC UA Client Simulator software. I also previously tried communicating with RapidSCADA and received the following error: Endpoint with the specified security options not found. And when I try to connect with "none" in the security policy, I get this error: BadSecureChannelClosed I have tried almost all the solutions available online and have not found a solution. I hope you can provide me with a solution that solves this problem. Thanks in advance
Last updated: 2026-02-16

Post by cfam on Codesys Control for PLCnext (PLC - AXL F 2152) ^{CODESYS Forge talk (Post)}
Good day All I would like to share some information on this site for the Codesys team as well for the future members using Codesys Control for PLCnext if it is allowed. I hope that i Post it in the correct spot. Subject: Codesys, Codesys Control for PLCnext Objective: Using the following Phoenix components to built a PLC Rack and run it on Codesys: Hardware and Software used 1. 2404267, AXC F 2152 - Controller 2. 1088136, AXL F BP SE6 - Module carrier 3. 1088129, AXL SE DO16/1 - Digital module 4. 1337224, AXL SE PD16 GND - Potential distributors 5. 1088127, AXL SE DI16/1 - Digital module 6. 1337223, AXL SE PD16 24V - Potential distributors 7. 1088123, AXL SE AO4 I 4-20 - Analog module 8. 1088134, AXL SE SC-A - Cover 9. Codesys v3.5 SP19 Patch 4 10. Codesys Control for PLCnext V4.10.0.0 Process: Firstly I built the Rack according to the Phoenix Project+ Software tool. Where I rebuilt it onto my test bench . I used the PLCnext Engineer IDE from Phoenix and all Communications where up and running and my PLC program executed successfully. THEN I tried the same PLC Layout with Codesys and Codesys Control for PLCnext. It was not successful and gave me the "Error: Local Bus not Running". I searched the web for answers but was unsuccessful in finding a solution. So I tried to change my configuration and found that the following Modules COULD NOT be recognized by Codesys Control. The result was that the Local Bus Failed to run. 1337224, AXL SE PD16 GND - Potential distributors 1337223, AXL SE PD16 24V - Potential distributors Example 1, Resulted in "Error: Local Bus Not Running": Module carrier slot 1: 1088129, AXL SE DO16/1 - Digital module Module carrier slot 2: 1337224, AXL SE PD16 GND - Potential distributors Module carrier slot 3: 1088127, AXL SE DI16/1 - Digital module Module carrier slot 4: 1337223, AXL SE PD16 24V - Potential distributors Module carrier slot 5: 1088123, AXL SE AO4 I 4-20 - Analog module Module carrier slot 6: 1088134, AXL SE SC-A - Cover Example 2, Result "Successful": Module carrier slot 1: 1088129, AXL SE DO16/1 - Digital module Module carrier slot 2: 1088127, AXL SE DI16/1 - Digital module Module carrier slot 3: 1088123, AXL SE AO4 I 4-20 - Analog module Module carrier slot 4: 1088134, AXL SE SC-A - Cover Module carrier slot 5: 1088134, AXL SE SC-A - Cover Module carrier slot 6: 1088134, AXL SE SC-A - Cover Result: Codesys or Codesys Control for PLCnext, has a PROBLEM to identify the following Modules. 1. AXL SE PD16 24V - Potential distributors 2. AXL SE PD16 GND - Potential distributors Hope that this information could be useful in future. Best regards Jaco Pretorius
Last updated: 2023-12-06

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