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 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: 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 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

Post by user3000 on Can't find an Extended Pulse Timer (TP and LTP) ^{CODESYS Forge talk (Post)}
Hello, For my program I need an extended pulse timer, which can be referred to as a retriggerable pulse timer. Where every rising edge of the input resets the elapsed time zero, extending the lenght of the output pulse. The Codesys pulse timer (TP) is a one-shot timer and only resets the elapsed time with the falling edge of the input. There is also a pulse timer (LTP) in codesys, but in my simulation it was also functioning as a one-shot even though the description sounds like LTP should be retriggerable. I have uploaded some timing plots from another PLC program for reference. I am looking for a timer equivalent to the "TEP" diagram. Is there an Extended Pulse Timer in Codesys? Maybe there is a way to manipulate the input so it resets the elapsed time outside the function block?
Last updated: 2023-12-06

Post by wbj0t on What the right way to update TCP/COM slave device holding registers ^{CODESYS Forge talk (Post)}
Hi all :) I have an plc. This plc has option to be as slave device. There are TCP -> Serial Slave Device and COM -> Serial Slave Device. There are 4096 ModBus holding registers with mark "internal modify" for the both devices above. So, COM Slave has 4096 registers and TCP Slave has 4096 registers. And, finally, I have an ARRAY[0..4095] OF WORD. This array glued with COM Slave and TCP slave. Yes, I need plc's opportunity to be communication both TCP and COM ways for the same registers. For example, the next task structure: * TASK_0: 1. pou_READ_Registers 2. pou_0 3. pou_1 4. ... 5. pou_N 6. pou_WRITE_Registers At the first pou I read registers for the other pous, after job we have sort of state of the plc. At the last pou (6) we write modified registers. It is a good scenario: some one wrote registers for the job, after job we save these (modified) registers. But, what if registers wrote between 1 and 6 pou by operator, for example, at the 3 pou -> the last pou 'pou_WRITE' will rewrite this request from operator. What the right way to work with this logic? Thanks you.
Last updated: 2024-07-01

Post by dekelec on Codesys 2.3 & Peak PCAN ^{CODESYS Forge talk (Post)}
I use Peak USB adapter daily to download from CoDeSys 2.3 and 3.5 to IFM, EPEC and other controllers. The process: - First you need to install the appropriate driver. Link: https://www.peak-system.com/Drivers.523.0.html?&L=1 - Restart the computer - Start the CoDeSys application - Change the name of the adapter in Communication parameters, as mentioned in previous comment. Write the name exactly as written "Peak_USB", as it could also be case sensitive (defines which .dll file to use). If this doesn't work I would contact the vendor of the controller to find out the procedure. In the attachment I've added a FAQ document from IFM regarding using PCAN USB. P.S. I've noticed in your picture of communication parameters a channel via TCP/IP is mentioned. In this case a USB to CAN connection is not being used. First you should change the channel/gateway to connect via CANbus or connect using an Ethernet cable.
Last updated: 2024-07-09

Post by mecmag on gear over gear (2 masters,1 slave) - how to do it? ^{CODESYS Forge talk (Post)}
Hello, i need to create an application that uses 2 masters, with 2 different ratios, and it outputs in one single slave. I explain better: Imagine axis A, B and C. -Axis A is the slave. -Axis B is master of A, with a specific ratio. -Axis C is master of A, with a specific ratio. the result motion from B and C should be executed by A, proportionally in position and ratios from B and C. With standard softmotion libraries (MC_...) it is not possible (i couldn't) because it is allowed only one master with its ratio. I have made a similiar application in past, using MoveOverGear in order to synch gears before engage. Instead this time, i need to do a gear over gear application, using 2 different masters. The position have to be the sum of both masters (considering their ratios). Any clue about how to do it? Or were to find some FB that can do it?
Last updated: 2024-08-16

Post by salvadegianluca on List files in a directory with SysDiropen And SysDirRead ^{CODESYS Forge talk (Post)}
Good morning; I'm facing an issue that seems being caused by the library itself. I'm trying to create the list of all the files that are stored inside a psecific directory. Unluckily the first file is allways hidden. VAR CONSTANT arysEmptyArray:ARRAY[iArrayMinDimension..iArrayMAXDimension] OF STRING := [(iArrayMAXDimension - iArrayMinDimension)('')]; iArrayMinDimension:INT := 1; iArrayMAXDimension:INT := 99; END_VAR VAR_INPUT sDirectoryToInspect:STRING; sSearchFilter:STRING; END_VAR VAR_IN_OUT xCheckFileInsideDirectory:BOOL; END_VAR VAR arysListOfFoundFiles:ARRAY[iArrayMinDimension..iArrayMAXDimension] OF STRING; sNullString:STRING; iNullIndex:INT := 0; libInfoAboutThePath:DirInfo; libResultOfThePathMonitoring:CmpErrors.RTS_IEC_RESULT; libInstanceToMonitorThePath:CmpErrors.RTS_IEC_HANDLE; sEntityToSearch:STRING; dMaxEntityDimension:DINT := SIZEOF(sEntityToSearch); libFileInfo:DirInfo; sFilteredFileName:STRING; iIndexToScrollArrays:INT; END_VAR IF xCheckFileInsideDirectory THEN arysListOfFoundFiles:=arysEmptyArray; iIndexToScrollArrays:=iArrayMinDimension; libInstanceToMonitorThePath:= SysDirOpen(szDir:= sDirectoryToInspect,szDirEntry:=sNullString,diMaxDirEntry:= iNullIndex,pDirInfo:= ADR(libInfoAboutThePath),pResult:= ADR(libResultOfThePathMonitoring)); WHILE libResultOfThePathMonitoring = Errors.ERR_OK AND iIndexToScrollArrays <= iArrayMAXDimension DO sEntityToSearch:= ''; libResultOfThePathMonitoring:=SysDirRead(hDir:=libInstanceToMonitorThePath,szDirEntry:=sEntityToSearch,diMaxDirEntry:=dMaxEntityDimension,pDirInfo:=ADR(libFileInfo)); sFilteredFileName:= FUN_06_00_FindItemInString_0(sFilter:=sSearchFilter,sSource:=sEntityToSearch); IF sFilteredFileName <> '' THEN arysListOfFoundFiles[iIndexToScrollArrays]:=sFilteredFileName; iIndexToScrollArrays:=iIndexToScrollArrays + 1; END_IF IF libResultOfThePathMonitoring <> Errors.ERR_OK THEN libResultOfThePathMonitoring:= Errors.ERR_OK; END_IF END_WHILE libResultOfThePathMonitoring:=SysDirClose(hDir:= libInstanceToMonitorThePath); xCheckFileInsideDirectory:=FALSE; END_IF How is possible to solve this issue? Any known work around?
Last updated: 2024-09-17

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