Post by seif-eddine on Save a comparison of two codes ^{CODESYS Forge talk (Post)}
Hello, I have a question: how can I save a comparison of two codes in CODESYS? Is it possible to do that?
Last updated: 2025-10-10

Post by seif-eddine on Save a comparison of two codes ^{CODESYS Forge talk (Post)}
Hello, I have a question: how can I save a comparison of two codes in CODESYS? Is it possible to do that?
Last updated: 2025-10-10

Post by snhatton on Trace commands via Test Manager ^{CODESYS Forge talk (Post)}
One option could be to use a trigger variable to execute your trace and then toggle that variable from a step within a test case.
Last updated: 2023-12-08

Post by voffi on About Codesys Task Executions ^{CODESYS Forge talk (Post)}
A task in CODESYS normally is a task of the underlying operating system. If your os is preemptive and the sheduler is configured accordingly a CODESYS task will be preemptive too.
Last updated: 2023-12-14

Post by apurv on Cannot pass array of constant size to a function as a reference ^{CODESYS Forge talk (Post)}
Could not find the solution to this issue but I have side stepped this by creating a global variable MAX_SIZE.
Last updated: 2024-01-08

Post by apurv on Cannot pass array of constant size to a function as a reference ^{CODESYS Forge talk (Post)}
okay but will this pass the array by copying it or it will be a reference to original array only.
Last updated: 2024-01-09

Post by reinier-geers on Pointer Axis ^{CODESYS Forge talk (Post)}
I want to make a FB of MC. But i need a variable for Axis. How do i have to declare that ? ptAxe : AXIS_Ref_SM3; //:= SM_Drive_ETC_Delta_ASDA_A2 ; this is somehowe a problem
Last updated: 2024-01-12

Post by victor on Trend-Trace / Time x-axis ^{CODESYS Forge talk (Post)}
Good morning, I am new to codesys, I am currently manipulating the Trace and Trend elements and I would like to know if it was possible to configure a variable or a trigger to reset the "X" axis to 0. have a good day.
Last updated: 2024-01-26

Post by nksr on Is using 'en-gb' and 'en-GB' in visuelems.currentlangauge the same? ^{CODESYS Forge talk (Post)}
I am currently programming a language switch program. So, the text flickers between 'en-gb' and 'en-GB' in visuelems.currentlangauge and even if I put a breakpoint, it still flickers. Can you please suggest a solution? Thanks
Last updated: 2024-01-31

Post by sturmghost on Visualization using methods and cyclic ST-calls ^{CODESYS Forge talk (Post)}
Not sure what you mean but you can define a visu initialization program and call it once at the visu initialization step. Look in the Visualization Manager there is a possibility to define such a program.
Last updated: 2024-03-03

Post by doli on Table selected row ^{CODESYS Forge talk (Post)}
Hello. So I have two visualizations. In my main visualization I have a table and in the second one I have a dialog. When I select a row I want that dialog to open. How can I do this? Thank you!
Last updated: 2024-03-20

Post by davidbo on I want to convert a WORD to a hex string like 15.432 to '3C48' ^{CODESYS Forge talk (Post)}
I try with BYTE_TO_HEXinASCII but I cant get it right. How do I convert a word value like 15432 to the HEX text string '3C48'
Last updated: 2024-04-19

Post by stulle on 3.5 P20 hangs - no response ^{CODESYS Forge talk (Post)}
Hello everyone, I have a problem. Codesys 3.5 P19 works without any problems. However, P20 is not usable, after starting it hangs "no response". A new installation didn't help either, unfortunately I can't find a more precise error. BR
Last updated: 2024-04-21

Post by davidbo on How to stay in a method until something is finished. ^{CODESYS Forge talk (Post)}
You never stay in a method. You need a block to do that. Something like: VAR button:BOOL:=FALSE; count:UINT:=0; END_VAR IF button THEN //read pressure count:=count+1; IF count>1 THEN button:=FALSE; count:=0; END_IF END_IF
Last updated: 2025-11-04

Post by tristan on Textfield display problem ^{CODESYS Forge talk (Post)}
Hello everyone, I have a little problem with textfield display. When I put a solid backgroud, no problem. But when I put it to invisible, some strange things appears with the text. Do you have this kind of issues ? Thanks a lot, Tristan
Last updated: 2025-11-20

Post by gseidel on STEPPER CODESYS SOFTMOTION_DRIVE ^{CODESYS Forge talk (Post)}
Hi kalmeyer, I would recommend to have a look at these examples. They come with a project and a description: https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_basic_examples_single_axis.html. Best regards, Georg
Last updated: 2025-11-28

Post by reinier-geers on SYSDIR 3.5.17.0 ^{CODESYS Forge talk (Post)}
I had a funcioning Directory read wit SYSDIR. Now ive got a new controller with Linux. and now i get only ordners Names. NO file Names !! WHY ? It workt already on a other with linux. But that was i think version 14
Last updated: 2026-01-06

Post by reinier-geers on SYSDIR 3.5.17.0 ^{CODESYS Forge talk (Post)}
I had a funcioning Directory read wit SYSDIR. Now ive got a new controller with Linux. and now i get only ordners Names. NO file Names !! WHY ? It workt already on a other with linux. But that was i think version 14
Last updated: 2026-01-06

Post by away on Visualization stops responding ^{CODESYS Forge talk (Post)}
Hi @spiritcore, Did you find a resolution to this? I'm running into a similar issue using TargetVisu when a user uses the login. It only happens sometimes, and when it does the login/logout buttons still work but the other buttons on the screen don't work.
Last updated: 2026-04-22

Post by alexgooi on Codesys KNX implementation ^{CODESYS Forge talk (Post)}
Dear Forum, For anyone interested we have solved this problem. Before we were using a KNX TP/IP interface, now we are using a KNX TP/IP router, and it works like a charm now.
Last updated: 2026-03-04

Post by darko7417 on When running as a service, CodesysControl doesn't write log files to the disk (and other CmpLog related issuess) ^{CODESYS Forge talk (Post)}
I run CODESYS runtime as a service and use CmpLog (the LogAdd2 function) to log different events to a file. I have done this many times before on various projects and hardware, and it works fine. On this particular system, I have CODESYS 3.5.20.40 running on a Windows 11 PC. The CODESYSControlService autostarts (with Local System credentials, the default), and the application runs fine. However, the configuration file is not read (or at least not the one that should be, or not the CmpLog section), and log files are not written to the disk. I would be thankful if anyone knew why this is happening and how to fix it. A note to CODESYS people: you must provide more information on the codesys configuration file, CODESYSControlService.exe and other major components and system behaviour. You created the service and various features (i.e. logging), but haven't explained how they work, which, in my opinion, is below standard for industrial automation software. These are my observations: - When running as a service, the config file is not read (none of them), or at least the CmpLog section is not read. I checked the log using Codesys IDE, and the CmpLog parameters are not the ones I have set in any of the config files. Which CmpLog config values does the service use, and where does it read them from? I have no idea, but it's not the config files. Here are the codesys config files I located on the PC's disk: o C:\Program Files (x86)\CODESYS 3.5.20.40\GatewayPLC\CODESYSControl.cfg (only 2 lines in this config) o C:\Program Files (x86)\CODESYS 3.5.20.40\GatewayPLC\AppDataFiles\CODESYSControlWinV3\CODESYSControl.cfg o C:\Users\SRV\AppData\Roaming\CODESYS\CODESYSControlWinV3\C4DBB537\CODESYSControl.cfg o C:\Program Files (x86)\CODESYS 3.5.20.40\GatewayPLC\tempCFG\CODESYSControl.cfg - When I run codesys as an app (e.g. by clicking the icon), this config file is read C:\Users\SRV\AppData\Roaming\CODESYS\CODESYSControlWinV3\C4DBB537\CODESYSControl.cfg and log files are written ok. The icon target is "C:\Program Files (x86)\CODESYS 3.5.20.40\GatewayPLC\CODESYSControlService.exe" -d o the -d option, I think, starts a cmd-like window showing service debug output (the output shown in log in the IDE) o the -i option, again I think, means install the service - I tried adding -d to service start parameters in the registry, but it started only once and after that it refused to start. Knowing what -d does and which other options are available would be great (e.g. can I make the service read a different config file). - Syslog UDP logging works fine in any case. - These are my CmpLog parameters ~~~ [CmpLog] Logger.0.Name=PlcLog3 Logger.0.Filter=0xFFFFFFFF Logger.0.Enable=1 Logger.0.MaxEntries=10003 Logger.0.MaxFileSize=50003 Logger.0.MaxFiles=33 Logger.0.Backend.0.ClassId=0x0000010B ;sends logger messages to SysOut Logger.0.Backend.1.ClassId=0x00000104 ;writes logger messages in a file Logger.0.Backend.2.ClassId=0x00000135 ;sends logger messages as UDP syslog Logger.0.Type=0x314 ;Set the timestamp to RTC ~~~
Last updated: 2025-02-27

Post by axberry on CODESYS Control for Raspberry Pi 5 - "Hardware version or firmware version not supported" on Rev 1.1, persists across multiple runtime versions and OS images ^{CODESYS Forge talk (Post)}
Hi, I'm trying to run CODESYS Control for Raspberry Pi SL on a Raspberry Pi 5, and the runtime consistently fails to start with the following error when launched manually: ooops... this runtime was built for RASPBERRYPI. Hardware version or firmware version not supported! (-18, 0x00000BB8, 0xFFFFFFFB) Hardware: Raspberry Pi 5 Model B Rev 1.1 Revision code: d04171 CPU: aarch64, BCM2712 Serial number is correctly exposed via /proc/cpuinfo and /proc/device-tree/serial-number /proc/device-tree/model correctly reports "Raspberry Pi 5 Model B" What I've tried (all resulting in the same error): CODESYS Control for Raspberry Pi SL 4.11.0.0 (SDK 3.5.19.61) — the version that introduced Pi 5 support CODESYS Control for Raspberry Pi SL 4.21.0.0 (SDK 3.5.22.20) — latest available Raspberry Pi OS Bookworm (64-bit) with kernel 6.12.93+rpt-rpi-2712 (June 2026 build) Fresh install on Raspberry Pi OS Bookworm (64-bit) with an older image from November 24, 2025 — same error, ruling out a kernel-version regression Bootloader/EEPROM confirmed up to date (rpi-eeprom-update reports "up to date") Clean purge and reinstall of the codesyscontrol package each time (verified via dpkg -l, no leftover files) Verified /etc/codesyscontrol/3S.dat correctly symlinks to /etc/codesyscontrol/3S_aarch64.dat The service starts (systemctl status briefly shows active (running) with a real PID under /opt/codesys/bin/codesyscontrol.bin), but crashes shortly after and the process disappears — port 11740 never opens. Since this happens identically across two different runtime versions and two different OS images (5+ months apart), it doesn't seem to be a kernel/firmware timing issue. Could this be specific to the Rev 1.1 board revision, or is there a known issue with the hardware detection logic in the SL runtime that I should be aware of? Happy to provide full debug logs (-d flag output) or journalctl output if useful. Thanks in advance!
Last updated: 2026-08-10

Post by brouwyka on JSONByteArrayWriter string result incorrect order ^{CODESYS Forge talk (Post)}
Hello everybody! We are currently working on implementing a call to an API that tracks data sent to it through a JSON body. Versions: CODESYS V3.5 SP19 Patch 7 using IIOT Libraries SL license, specifically JSON Utilities SL version 1.13.0.0. For simplicity, let's say we want to construct the following JSON body for our request (simplified to just 1 key-value pair in each of the array objects to keep things shorter, but we'd have multiple fields in each in reality): { "id": "machine_1", "readings": [ { "temp_mid": 153.8 }, { "temp_mid": 98.3 } ], "status": "RUNNING" } However, our "readings" data is added over time, not in creation, so calls to the builder would be somewhat out of order. In a simplified manner, our calls would look like this: jsonBuilder(pJsonData := JsonData, diRootObj => rootJsonIndex); // rootJsonIndex = 0. // Set "id" at root JSON object. wsValue := "machine_1"; jsonBuilder.SetKeyWithValue("id", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 1, VALUE: diParentIndex = 1 & diIndex = 2. // ... Time passes, we get our first reading to add ... // The "readings" array does not exist yet, so we make it first at root JSON object before adding our first reading. readingsJsonArrayIndex := jsonBuilder.SetKeyWithArray("readings", diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 3, VALUE: diParentIndex = 3 & diIndex = 4. // Then add the first reading, for which we first have to make an object. readingsJsonArrayObjectIndex := jsonBuilder.SetObject(diParentIndex := readingsJsonArrayIndex); // JSONData OBJECT: diParentIndex = 4 & diIndex = 5. // And then we add the field(s) in the object for the first reading. // NOTE the use of `readingsJsonArrayObjectIndex` so we set the field(s) in the first object in the array. rValue := 153.8; jsonBuilder.SetKeyWithValue("temp_mid", wsValue, diParentIndex := readingsJsonArrayObjectIndex); // JSONData KEY: diParentIndex = 5 & diIndex = 6, VALUE: diParentIndex = 6 & diIndex = 7. // ... Time passes, we want to add another root-JSON-level field ... // Set "status" at root JSON object. wsValue := "RUNNING"; jsonBuilder.SetKeyWithValue("status", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 0 & diIndex = 8, VALUE: diParentIndex = 8 & diIndex = 9. // ... Time passes, we want to add a second reading ... // "readings" array exists, so add the second reading, but first we have to make another object. // NOTE the re-use of the earlier stored `readingsJsonArrayIndex`, so we add the new object to that previously created array. readingsJsonArrayObjectIndex := jsonBuilder.SetObject(diParentIndex := readingsJsonArrayIndex); // JSONData OBJECT: diParentIndex = 4 & diIndex = 10. // And then we add the field(s) in the object for the first reading. // NOTE the use of `readingsJsonArrayObjectIndex` so we set the field(s) in the SECOND(, new) object in the array. rValue := 98.3; jsonBuilder.SetKeyWithValue("temp_mid", wsValue, diParentIndex := rootJsonIndex); // JSONData KEY: diParentIndex = 10 & diIndex = 11, VALUE: diParentIndex = 11 & diIndex = 12. // ... Finally, we want to send to the API, so we must convert the builder to data the client accepts as a body ... xTestWriteToJsonArray := TRUE; jsonArrayWriter( xExecute := xTestWriteToJsonArray, pwData := ADR(jsonDataString), udiSize := SIZEOF(jsonDataString), jsonData := JsonData^ ); IF jsonArrayWriter.xDone THEN // The writer was successful, the `jsonDataString` VAR should now contain a WString copy of the JSON object from the builder. xTestWriteToJsonArray := FALSE; END_IF We see that the JsonData STRUCT is correctly organised (in terms of the diParentIndex & diIndex set by it for each JsonElement) as we expect, as outlined in my comments in the simplified code above. However, as soon as we pass it to the jsonArrayWriter (which is a JSON.JSONByteArrayWriter), the resulting jsonDataString does not match our expectations, instead coming out like this: { "id": "machine_1", "readings": [ { "temp_mid": 153.8 } ] } { "temp_mid": 98.3 } "status": "RUNNING" The behaviour of the JSONByteArrayWriter thus seems to be the problem here. It does not seem to correctly process the children of JsonElements that are ARRAYs when additions to them are done broken up by additions to the lower level JSON OBJECT they are a part of. We have confirmed this by changing the order of the calls in our example to add both readings before adding the "status", in which case we get our expected outcome. However, in reality this is not possible for us - additions to any of the JSON's objects, arrays or array objects may happen at any time after other fields elsewhere in the JSON have been added. Does anyone know a way around this, a fix, or knows a solution we simply have not found? This same phenomenon was also noted on this forum by user @ryusoup at the end of 2023 (https://forge.codesys.com/forge/talk/Engineering/thread/c45929e2f1/#e27f) and user @mtho in early 2024 (https://forge.codesys.com/forge/talk/Engineering/thread/cd1bb450db/#1292) but both topics received no activity beyond both users' opening posts. Looking through the release notes of all the versions of the JSON Utilities SL library, I also did not see any remarks on resolutions of bugs in this vain. Thanks in advance for the assistance!
Last updated: 2026-06-10

Post by gilad on CODESYS SoftMotion Generic DSP402 on WAGO PFC200 + Festo CMMT-AS: MC_Power stays Busy, Controlword remains 0 ^{CODESYS Forge talk (Post)}
Hello, I am trying to connect a Festo CMMT-AS-C4-3A-MP-S1 servo drive to a WAGO PFC200 (750-8210) using EtherCAT and CODESYS SoftMotion. Hardware PLC: WAGO PFC200 750-8210 Drive: Festo CMMT-AS-C4-3A-MP-S1 Communication: EtherCAT CODESYS version: Device description version 6.3.1.1 Drive firmware: 36.10.3 Current Status EtherCAT communication is working correctly: EtherCAT master = Running Drive detected and operational PDO input and output mapping is active Statusword, position and velocity are updating correctly Current PDO mapping: Outputs: 6040 Controlword -> %QW0 6060 Modes of operation -> %QB2 607A Target position -> %QD1 60FF Target velocity -> %QD3 Inputs: 6041 Statusword -> %IW2 6061 Modes of operation display -> %IB6 6064 Position actual value -> %ID2 606C Velocity actual value -> %ID3 SoftMotion Axis I added a SoftMotion CiA402 axis under the EtherCAT slave: Axis type: SM_Drive_GenericDSP402 Axis communication state: operational (100) No SoftMotion mapping errors anymore Problem MC_Power is executed with: Enable = TRUE bRegulatorOn = TRUE bDriveStart = TRUE but: Status = FALSE Busy = TRUE Error = FALSE ErrorID = SMC_NO_ERROR The axis remains in: SMC_AXIS_STATE.power_off DSP402 state = SWITCH_ON_DISABLED The most important observation: Statusword = 32784 (0x8010) Controlword (%QW0) remains 0 all the time SoftMotion never writes 6, 7, or 15 to the Controlword. Additional Information The axis status page reports: "The license is missing or invalid. The PLC runs in demo mode." I am not sure whether: The missing SoftMotion license prevents Controlword generation completely. The axis is still not correctly connected to the EtherCAT slave despite operational communication. There is an additional CiA402 configuration step required for the Festo CMMT-AS drive. Has anyone successfully used a Festo CMMT-AS MP drive with CODESYS SoftMotion Generic DSP402 on a WAGO PFC200? Any suggestions on what should be checked next would be greatly appreciated.
Last updated: 2026-06-24

Post by bjarne-pagaard on Communication between applications on same device/controller/runtime (Win RTE 3.5.20.20) ^{CODESYS Forge talk (Post)}
Thanks for this - I have now been looking in to just having an extra (non-RTE) runtime on the same machine, as you suggest. I will probably proceed this way. Even though it still seems very odd to me, that variable exchange to a different runtime is easier than between applications on the same controller. There will be some fun with the licensing, it seems. Does anyone know if it is possible to specify which license container/specific license the runtime is going to use at runtime. Let's say I have two available licenses with different resources available, for example one license allows multicore and multiple EtherCAT channels, but not many visu tags (for the RTE). Another with less resources but a lot of visu tags (for the Visu controller). Let's say the program in one of the controllers could be fully licensed by either of the two available licenses, but picks the 'largest' first. A bit later, the larger application starts, but is left with the smaller license.. How can I make sure that the 2 runtimes select the right license at startup?
Last updated: 2024-10-01

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