Post by nano on Cant login to Rpi4 but can see it in codesys communications settings. ^{CODESYS Forge talk (Post)}
which ports in detail are configured. the search of the rts works via broadcast-messages, programming with tcp-port on p2p-connection woth port-hopping, handled by runtime after siccesfully handshake. look at this entry on forge https://forge.codesys.com/forge/talk/Runtime/thread/4078a2ed28/
Last updated: 2024-06-23

Post by kuegerls on SysProcessExecuteCommand2 and CANopen Device ^{CODESYS Forge talk (Post)}
I have now conducted some tests. The problem occurs when the Python script establishes an OPCUA connection, even if I only establish the connection without reading or writing any data. Is there another way to exchange data between Python and CODESYS without having to put in a lot of effort?
Last updated: 2024-06-24

Post by koppit on SysComRead Timeout Parameter ^{CODESYS Forge talk (Post)}
Im using SysCom ver. 3.5.17.0 and seem to have the same issue on a Raspberry Pi. It's not waiting for the requested number of bytes, no matter if "ulTimeout := SYS_INFINITE" or any other value. The only solution I have found is to stall the program to allow the serial port to recieve the data.
Last updated: 2024-06-26

Post by mait-tim on Errors after moving from SP18 to SP20/21 ^{CODESYS Forge talk (Post)}
Hello, Im running into a problem after moving from SP18 to SP20 or SP21. After the update I have an error with the TextFieldInmputHandler.VariableWritten which is implemented if de visualisation part of my software. The interface seems to have changed. I cannot find the new implementation. Does anyone know how to solve this issue.
Last updated: 2025-10-20

Post by mait-tim on Errors after moving from SP18 to SP20/21 ^{CODESYS Forge talk (Post)}
Hello, Im running into a problem after moving from SP18 to SP20 or SP21. After the update I have an error with the TextFieldInmputHandler.VariableWritten which is implemented if de visualisation part of my software. The interface seems to have changed. I cannot find the new implementation. Does anyone know how to solve this issue.
Last updated: 2025-10-20

Post by kaotic2499 on Upgraded Raspberry 2b to Raspberry 5, Trends Broken? ^{CODESYS Forge talk (Post)}
Is there anyone who can assist me? ill just have to raise this as a bug with codesys otherwise. I see this as the only way foward. ill attempt a fresh install of RPI in the next day or two, but thats all i had previously so 🤷‍♂
Last updated: 2025-10-21

Post by snguyen on Any ways to prevent Infinite scroll when moving an object to the left or top edge? ^{CODESYS Forge talk (Post)}
I've been making few HMIs and I'm starting to get annoyed that whenever I try to align an object to the left or top side of the frame, it quickly scrolls into that direction infinitely. Is there a way to prevent that?
Last updated: 2025-10-24

Post by alessandro on Configuring a CIP object for Explicit Message ^{CODESYS Forge talk (Post)}
We used this with shared memory codesys. and work. OpENer is an EtherNet/IP™ stack for I/O adapter devices; supports multiple I/O and explicit connections. And we adapt this also for Implicit message. But for arrive to the end we spend a lot of time. :-(((
Last updated: 2025-10-24

Post by vtec35 on search runtime 4.9.0.0 for pi 3 ^{CODESYS Forge talk (Post)}
Hello everyone, following corrupted data on the SD card of our Pi3B+ provided with a machine, we reinstalled a CODESYS image for Raspberry Pi, but we cannot find the 4.9.0.0 runtime that is compatible with the project. Currently, the machine is on 4.1.0.0, and we tried a more recent version 4.13.0.0, but there are error messages. Thanks in advance.
Last updated: 2025-10-24

Post by kporter on SoftMotion, accessing PDO input data via object ref/pointer ^{CODESYS Forge talk (Post)}
Now that SP21 is out, what's the answer? I want to get a pointer to the TxPDO and RxPDO structs. I can generate a STRUCT declaration from the ESI file with a bit of Python. I just need to get the pointer from the ETC_Slave.
Last updated: 2025-10-29

Post by fahrettin on CODESYS 3.5.17.30 Setup Error ^{CODESYS Forge talk (Post)}
While trying to install CODESYS 3.5.17.30 (64-bit) on my Windows 11 computer, I'm getting the errors below. The first error occurs near the end of the installation. Once you bypass it, the installation returns the second error. Do you have any suggestions for a solution? By the way, I've tried this on several PCs, but I haven't found a solution.
Last updated: 2025-10-30

Post by gseidel on SMC_ERROR SMC_CGR_INVALID_POSPERIOD ^{CODESYS Forge talk (Post)}
Hi blitz, that usually means that the modulo period, when converted to increments, is larger than 2^31. (The bus bandwidth is usually 2^32.) What is your "technical unit", do you program in angular degrees? And what is the modulo period? If you want you can post the drive configuration (screen shot of the "General" and "Scaling/Mapping" page). Best regards, Georg
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 gatto on warning C0195 ^{CODESYS Forge talk (Post)}
Good morning dear codesys users. I'm using 3.5.20.40 and I get this warning C0195 when I assign an initial value to xyz. However, if I do it on a single byte (abc), it doesn't display any warning. Why? VAR_GLOBAL abc : BYTE := 100 ; xyz : ARRAY [1..10] OF BYTE := [10(100)] ; END_VAR
Last updated: 2025-11-20

Post by yohayr on Access Violation sherd memory ^{CODESYS Forge talk (Post)}
Hi, once in a while I get an Access Violation exception in Sherd memory pointer. the strange thing is that I protect the pointer dereference and I get this exception 1 line after the protection. I added photos of the exception can someone tell me what is that about?
Last updated: 2025-11-25

Post by yohayr on Access Violation sherd memory ^{CODESYS Forge talk (Post)}
Hi, once in a while I get an Access Violation exception in Sherd memory pointer. the strange thing is that I protect the pointer dereference and I get this exception 1 line after the protection. I added photos of the exception can someone tell me what is that about?
Last updated: 2025-11-25

Post by malie on Codesys 3.5.21.3 add Library search not work ^{CODESYS Forge talk (Post)}
Hello, i am not getting any results in add library. On 3.5.19.7 i got results. I tried on different machines on windows 10 and windows 11. Repair install and complete new install of codesys 3.5.21.3 dose not help. I can select and import libraries, that work. What am i doing wrong? That has always worked flawless till 3.5.21.3.
Last updated: 2026-01-20

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 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 davidbo on Two licenses have to be installed forgot to enable one license ^{CODESYS Forge talk (Post)}
I have to install "Basic M" and "Visualization M", but it seems that during installation of "Basic M" you have to enable "Visualization S" I assume if you here after want to install my "Visualization M". And I forgot to enable "Visualization S" How do I fix that?
Last updated: 2026-02-02

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 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: 7 days ago

Post by cdutz on Problems connecting to Codesys 4.9.0.0 runtime on my Wago PFC200 ^{CODESYS Forge talk (Post)}
Turns out I managed to get a connection to my PLC. It seems that a few weeks ago Wago released something with version 4.3.3(25). So I reset my PLC to Factory-Reset, set it to the 192.168.1.17 IP and changed the IP to the one I wanted with the Wago EthernetSettings tool. Then updated the latest firmware using the WAGOupload tool. Now the PLC came back up without a PLC runtime running, so in the Web-tool I wen't to the "Configuration"/"PLC Runtime" and selected the runtime version "CODESYS V3". I uninstalled all Codesys versions and installed the version from the download package of Wago together with all the packages the bundle provided. After creating a new project I didn't select the old PFC200 runtime, but one of the dozens of new device profiles, that it now listed. With these settings I was then able to connect to my PLC. Now I hope I'll get the existing project that I had ported to this new structure. Sorry for the noise. Chris
Last updated: 2023-08-26

Post by danwoodlock on RPI Zero w - Edge gateway cant install ^{CODESYS Forge talk (Post)}
Hello all, First post. I recently acquired an RPI zero W from amazon, and have been using it with Codesys v3.5 SP19 patch 2. I first got it working yesterday, and after installing the runtime on the Pi, I was prompted to install the edge gateway. Installation of the edge gateway failed because of unsupported architecture, undeterred I was able to connect to the pi and program as I wanted. The issue I've noticed is that if I do not load anything to the pi overnight, I can then no longer connect to the pi and download, although I can still ping it from my pc. I found that if I power cycle the PI, I am then able to connect again, and it works as normal. I did some googling and found instances where people recommended downloading the newest edge gateway, which brings me here. Wondering if there are any suggestions, or if this is a known issue. I actually tried installing all 3 versions of edge gateway for science, but all fail with the same message. Thanks -Dan
Last updated: 2023-09-13

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