Post by willebro on "Distributed clocks are not synchronized, Rea time problem on hardware" ? ^{CODESYS Forge talk (Post)}
https://forge.codesys.com/forge/talk/Engineering/thread/632c29cb93/#8d94 The above comment is the best, but if you just want to see it work you can try disabling the distributed clock. It's not the right thing to do but it should resolve that error.
Last updated: 2025-12-16

Post by aniket-b on Scara3 kinematic robot error ^{CODESYS Forge talk (Post)}
Thanks Georg for responding. I have followed the suggestion mentioned in the real time problem. However, it does not solve the problem. The weird part is, the robot stops at the same position randomly and it does not stop when I increase the speed of the motion.
Last updated: 2025-12-23

Post by blitz on Can't get SMC_SmoothPath to work ^{CODESYS Forge talk (Post)}
Hi @bertus I have a similar situation: just like in your case I can see that rounding works correctly only for the first element, additionally in my case on a path made of lines where I am testing this every second line is skipped. The interpolator jumps to every second iActObjectSourceNo.
Last updated: 2026-01-07

Post by timvh on <Dereference of invalid pointer> ^{CODESYS Forge talk (Post)}
Yes, this can be fixed by setting the correct reference to the structure.... But by only the given information it is impossible to say what you did wrong. Maybe you can start by first creating an instance of the structure within the program to see how this works.
Last updated: 2026-06-26

Post by eschwellinger on Deploy LicenseServer for Linux SL ^{CODESYS Forge talk (Post)}
for the package you net to install 32bit support(to have the native timprovider availble to deploy) sudo apt-get install libc6:i386 Then native Safeplc and native Safetimeprovider should be available to install. Raspi yes - but there is no official package available till now and you need have a rt_preemt patched kernel on the Pi, then it works like charm
Last updated: 2025-11-18

Post by timvh on Textfield display problem ^{CODESYS Forge talk (Post)}
Did you test this with the latest version of the CODESYS Visualization add-on? Something that you might want to test is if it works better when you disable the "Support client animation and overlay of native elements". Double-click on the VisualizationManager in your project to find this setting.
Last updated: 2025-11-21

Post by osande on Trend/trace data ^{CODESYS Forge talk (Post)}
Ok, the problem is that the trend/trace system can't read function block instance data. The variables has to be stored directly under the program calling the FBs. Thus, FB variables to be trended/traced must be connected to variables declared in the program. Seems like a bug to me!
Last updated: 2026-03-13

Post by bdschnapp on OPC-UA ApplicationUri / ProductUri ^{CODESYS Forge talk (Post)}
From Codesys support: The format of the URN is always the same. It's always urn:<vendor>:<product>:OPCUA:Server. What I think you can influence the vendor and product (DeviceName) through settings in the runtime cfg file:</product></vendor> [SysTarget] VendorNameUnicode="T\00E\00S\00T\00" DeviceNameUnicode="t\00e\00s\00t\00" Note that these are 16-bit strings, thus the ASCII padded with nulls
Last updated: 2026-03-17

Post by dat422 on OPC UA Enum Issue ^{CODESYS Forge talk (Post)}
Hi everyone, I’m using CODESYS V3.5 SP22 with the Communication Manager to run an OPC UA server. I have a problem with enums: when I view them in a client like UaExpert, only the last enum member is shown, and it has the wrong value. Has anyone seen this issue before or knows what might cause it? Thanks!
Last updated: 2026-03-27

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 nulltrace on Codesys Installation Always Freeze when the installing is almost done ^{CODESYS Forge talk (Post)}
in most of this cases the Installer ins't frozen, it's more likely that the Antimalware-Service-Executable slow's them down. Turning it off during installation of Codesys helped me all the time. Also keep attention on Taskmanager to get e feeling for the Installer Give it a try.
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)}
your case looks different, the first one was an codesys modbus tcp-slave, your's an Master-Application with gateway. I dont know this Unit, but i would say, from Point of Codesys it looks wrong configured. Just give us more detailed configuration and the please make a sketch of the topology you're trying to realise.
Last updated: 2026-04-08

Post by alexgooi on Network variable stops sending ^{CODESYS Forge talk (Post)}
Are you making use of structs in the NVL? In the past I had similar behavior (NVL stops sending) when I added something in the struct. if you are making use of structs makes sure that the structs are identical in both projects. If this is not the case, have you tried changing the port number to something different than 1202?
Last updated: 2026-04-29

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 erik-gerrits on Dynamic Images ^{CODESYS Forge talk (Post)}
I ran into this issue as well. Here is the fix: Good example: CASE iBitmap OF 0 : sName := 'ImagePool.image0'; 1 : sName := 'ImagePool.image1'; END_CASE Bad example (this will only work on the target device, WebVisu will show a blank rectangle): CASE iBitmap OF 0 : sName := '/home/cds-apps/PlcLogic/visu/image0.png'; 1 : sName := '/home/cds-apps/PlcLogic/visu/image1.png'; END_CASE
Last updated: 2026-07-10

Post by wold on CodeMeter Network Server: Keep runtime dongle local-only and export only a second CmStick ^{CODESYS Forge talk (Post)}
Hello, I am running a CODESYS Control Runtime on a Raspberry Pi. Two CmSticks are connected to the same system: CmStick A - Runtime license - MultiCore license - KNX license CmStick B - Engineering / Developer licenses My goal is: The runtime on the Raspberry Pi shall use CmStick A locally. Licenses from CmStick A shall NOT be provided by the CodeMeter Network Server. Only licenses from CmStick B shall be available to remote network clients. During troubleshooting I observed that the CodeMeter Network Server collects licenses from both CmSticks. The KNX license appears to be local-only, but the runtime and multicore licenses of the same dongle are still visible through the server. I would like to know if a supported configuration exists for the following scenario: One CmStick remains strictly local to the runtime. A second CmStick on the same machine is exported through the CodeMeter Network Server. Questions: Is it possible to exclude a specific CmStick from being exported by the CodeMeter Network Server? Can this be configured via License Access Permissions (ACL), WebAdmin, or another mechanism? Can export rules be applied per CmStick, per Firm Code, or per Product Code? If supported, could you provide a configuration example or a reference to the relevant documentation? The reason for asking is that after removing a separately installed CodeMeter server component and returning to a local-only setup, the runtime licensing behaviour became stable again. Therefore I am looking for the officially supported way to keep the runtime dongle local while still providing engineering licenses from a second dongle over the network. Thank you.
Last updated: 2026-08-02

Post by antonz on Could not write options file at... ^{CODESYS Forge talk (Post)}
I ran into a similar issue, albeit not the exact same conditions nor the same file if I recall correctly. As a workaround I have used an elevated account to give my regular user account write access to the specific directory where the failure occurred. It is not pretty and I am not happy with it. It does work.
Last updated: 4 days ago

Post by kambel on IO Drive on C manual ^{CODESYS Forge talk (Post)}
Hello, pls help!!! Is there a more detailed manual (for dummies) for writing your own IO drive device in C? Another question: how can I add diagnostics to the IEC IO Drive device so that a red triangle lights up in the project tree in the event of a malfunction?
Last updated: 2026-01-29

Post by davidbo on Two licenses have to be installed forgot to enable one license ^{CODESYS Forge talk (Post)}
Raspberry Pi MC Application based license: CODESYS Control Standard M CODESYS Visualization M (Could not be installed) CODESYS Control Standard M pops up with a dialog window where I can select 3 bundled licenses one of which is "Visu S" which I didn't select
Last updated: 2026-02-03

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 yannickasselin on Lenze i950 Servo and WAGO PFC200 ^{CODESYS Forge talk (Post)}
I don't have time to go through the whole manual but as I said earlier, the servo drive does not support any of the modes needed for SoftMotion Light to work. If you want to use the full SoftMotion, you could use SMC_Homing function block to do the homing. This function block does not use the Homing Mode. It still uses the CSP mode and does the logic in Codesys runtime instead of in the servo drive. Read the documentation about it to see if it fits your needs. But if your controller only supports SoftMotion Light, I am afraid you will not be able to use the i950. I do a lot of motion stuff with different servo brands. Some support all the modes needed for SoftMotion Light and some don't. You really need to make sure the modes are supported before choosing a brand over another. I tend not to use brand specific controllers in order not to be limited by their supported features. I usually choose a PC (Linux or Windows) and install the Codesys runtime and licences myself. This is the most flexible way to use Codesys in my opinion. Depending on how many axes are needed in your project, a full SoftMotion license may not be more expensive than SoftMotion Light because SoftMotion is available as Application based license whereas SoftMotion Light is not. But of course, SoftMotion is harder on the CPU than SoftMotion Light.
Last updated: 2026-02-13

Post by poliautomacao on Absolute movement controlled by an external encoder. ^{CODESYS Forge talk (Post)}
Hello, is it possible to perform an MC_MoveAbsolute movement, and have the servo move using an external encoder (freeEncoder)? In my application, I have slippage on the main shaft of the servo motor, and I would like to add an encoder to measure the actual position of the material.
Last updated: 2026-03-04

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