Post by alez on CANOpen SDO to write VISIBLE STRING ^{CODESYS Forge talk (Post)}
Hello, I am experiencing difficulties in configuring a CANopen device by sending SDOs. In particular I am attempting to write an Object Dictionary that has VISIBLE STRING as the Data Type. When I try to configure the sending of an SDO from Codesys to configure this parameter I am not allowed to enter a string value. In my particular case I am trying to change the Manufacturer Device Name ( Index 0x1008 ). Could it be that Codesys doesn't manage these types of variables?
Last updated: 2024-04-29

Post by yannickasselin on How to sort JSON object in codesys ^{CODESYS Forge talk (Post)}
Just adding: sSubscriberdata := ''; Right before your memcopy should fix the extra characters. It is because your are copying 36 characters into a string which can contain more than 36 characters and there is garbage left in the extra characters. Regarding the parsing of json, I usually build a structure that mirrors the json data and use the available methods in the IIoT library to parse the data and fill the structure.
Last updated: 2024-05-08

Post by shebi87 on Program from one PLC to other WAGO 750-8204 ^{CODESYS Forge talk (Post)}
Hello Everyone, 750-8204 was installed on a machine and it becomes faulty. We have arrange a new PLC from local market we don't have PLC program but thanks to our other machine which has the same PLC running I want to upload the program from that running PLC and download it to new PLC can anyone tell me the procedure please?
Last updated: 2024-05-21

Post by corriibme on Setting array values with JSON Utilities SL ^{CODESYS Forge talk (Post)}
It turns out that you can build JSON structures without ever calling the JSONBuilder function block directly. Instead, create a pointer to JSON.JSONData and invoke the necessary methods on its dereference. The parent object has a parent index of -1 (and an index of 0). EVERY other item (including keys, values, empty arrays and sub-objects) created by the setX methods needs the index to increase by 1. Then use the JSONByteArrayWriter FB to generate your JSON string
Last updated: 2024-05-23

Post by wiresplus on Display minutes as hours & minutes ^{CODESYS Forge talk (Post)}
Hello, I have a counter that increments an INT value once per minute I want to display this value in Minutes until 60, then Hours/Minutes thereafter on the HMI Codesys V3.5 SP16 I can divide the minutes by 60 to get hours, but then the minutes is still more than 60. Example: a process has run for 350 Minutes. I need to display "5 Hours 50 Minutes" But if it's only been 45 Minutes, I don't want "0 Hours 45 Minutes" , just "45 Minutes"
Last updated: 2024-05-25

Post by yofi on Raspberry Pi 4 POU not running ^{CODESYS Forge talk (Post)}
I have this error where the pou doesn't run even for simple programs like contact and a coil if i remove the pou from the task and put another one it works for one run then it stops working again in the photo we can see a contact is on but the coil connected to it is still not on and the device is in run mode I had this issue again and again any help
Last updated: 2024-06-02

Post by yofi on Raspberry Pi 4 POU not running ^{CODESYS Forge talk (Post)}
I have this error where the pou doesn't run even for simple programs like contact and a coil if i remove the pou from the task and put another one it works for one run then it stops working again in the photo we can see a contact is on but the coil connected to it is still not on and the device is in run mode I had this issue again and again any help
Last updated: 2024-06-02

Hi, I try to send and receive data using a UDP connection via SysSocket 3.5.17.0. While sending data works fine, I have problems with the receiving part. I am able to capture the received data of client side in wireshark But unable to capture it on the codesys ^{CODESYS Forge talk (Thread)}
Hi, I try to send and receive data using a UDP connection via SysSocket 3.5.17.0. While sending data works fine, I have problems with the receiving part. I am able to capture the received data of client side in wireshark But unable to capture it on the codesys
Last updated: 2024-06-03

Post by installwhat on C0077 on one machine but not another ^{CODESYS Forge talk (Post)}
https://forge.codesys.com/forge/talk/Engineering/thread/92c913bf7c/ Solved by changing the ethercat master version after reading the thread linked above. I think I need to read up on why this happened. I understand that placeholders should point to a particular version for obvious reasons however what has occurred in this instance is different. The example project was released as a "project archive" but it seems to load differently based on what I've got installed in my repositories. I'm going to dig into that tomorrow but any advice is welcome.
Last updated: 2024-06-11

Post by rene-h on VU.FbOpenDialog - TargetVisu - 2 x WebVisu ^{CODESYS Forge talk (Post)}
Hello, i am trying to find a way how to open Dialogs on a Single Visu. The options from VU.Globals are Target and WebVisu, but Webvisu opens the Dialog on both WebVisus and it should be separated. CurrentVisu can only be used when the Dialog is called from the Visu, but its all done in the Code. One Webvisu is for the User and one is for diagnostic reasons, and they should not be interfered from each other. Maybe someone can help me with this. Thanks
Last updated: 2024-06-13

Post by rabaggett on No Visu on RasPi ^{CODESYS Forge talk (Post)}
Hello, I have been having trouble getting a visualization to show up on the RasPi. I have previously used both WAGO touchscreen and Windows ControlWin and had no trouble. The visu does not show on the Raspi screen on start of the program and attempts to view in a browser both on the Raspi (Chromium) and from my laptop (Brave,Chrome,Firefox) running Codesys development fail. The visu shows correctly in Codesys development when online. (Win 11) The control code that is active is operating correctly. Raspi Codesys runtime is licensed. What am I missing? Thanks!
Last updated: 2024-06-20

Post by wollvieh on License Activation Problems ^{CODESYS Forge talk (Post)}
on a raspberry pi delete the folder and its content before licensing. /var/opt/codesys/cmactlicense If you plug this SD card in another raspi ( which has another hw-serial number) you'll get a second empty softcontainer. This could lead to an unlicensed PFC (it could only handle one container) The solution is: To delete the /var/opt/codesys/cmactlicense directory and content of it and then aktivate the lizenz via WibuCmRau file and Lizenzmanager.
Last updated: 2024-06-24

Post by sajid on NMEA Serial data read in Control win v3 x64 ^{CODESYS Forge talk (Post)}
I am using the SerialCom example program from the CODESYS website to read NMEA strings in CODESYS Control Win V3 x64 through a serial-to-USB converter. However, I occasionally receive only partial data or encounter errors in the received string. A screenshot of expected NMEA string attached for reference. Could you please advise on how to ensure the full NMEA string is received consistently? Error in strRead variable is <value of="" the="" expression="" cannot="" be="" retrieved=""></value>
Last updated: 2025-10-16

Post by sajid on NMEA Serial data read in Control win v3 x64 ^{CODESYS Forge talk (Post)}
I am using the SerialCom example program from the CODESYS website to read NMEA strings in CODESYS Control Win V3 x64 through a serial-to-USB converter. However, I occasionally receive only partial data or encounter errors in the received string. A screenshot of expected NMEA string attached for reference. Could you please advise on how to ensure the full NMEA string is received consistently? Error in strRead variable is <value of="" the="" expression="" cannot="" be="" retrieved=""></value>
Last updated: 2025-10-16

Post by shaun on GAMP 5 and 21 CFR Part 11 ^{CODESYS Forge talk (Post)}
Good day I have been asked to do a project. It is for a pharmaceutical application and data needs to be logged. The spec calls for the control system to comply with GAMP 5 and 21 CFR Part 11. From what I can find online it's got to do with electronic records and validation. Has anyone developed any software using this or are there codesys librarys that can make my life easier in writing this code
Last updated: 2025-10-22

Post by peder on Parker Compax3 controlled by Schneider LMC 201 ^{CODESYS Forge talk (Post)}
I have replaced a Parker PAC320 with a Schneider LMC 201 The system has some Parker Compax3 servodrive communicating over EtherCAT. PAC320 is programmed with Codesys 3.5.15. The program is opened in Machine Expert 3.2. But I can not get the commumication running to the Compax3. When I scan for hardware the it seems like the Compax3 is registated, but not the motors. Anyone that have succeded this replacement?
Last updated: 2026-01-13

Post by sheberle on ERROR: Calling the program "AlarmStorage_Prg" is not allowed from multiple tasks ^{CODESYS Forge talk (Post)}
Do you have any additional information about when the error occurs? I am trying to recreate this issue to find a workaround... Maybe you could also make the project available. You could add the following logfilter to the CODESYS configuration file: [CmpLog] Logger.0.Filter=0xFFFFFFFF Logger.0.Enable=1 Logger.0.MaxEntries=10000 Logger.0.MaxFileSize=1000000 SysSem.Filter=0xFFFFFFFF SysTask.Filter=0xFFFFFFFF I hope that the log filter will show us which task is responsible for this, so we can narrow it down a bit more.
Last updated: 2026-03-31

Post by dgross on Alarm Manager History Message Missing ^{CODESYS Forge talk (Post)}
Hi All, I'm using a webvisu on a control Win V3 SoftPLC. My issue is with the Alarm Managers Alarm history. It does create entry's and does also show the latch data. But it only shows the message of the active alarms. In the history the message is empty (also in the .csv Export file). The archiving in the alarm group is checked and the Alarm storage is activated. I'm using the Version V3.5 SP22 Patch 1. Do you have any idea where that comes from?
Last updated: 2026-04-20

Post by mohi on Connect to Azure IoT Hub ^{CODESYS Forge talk (Post)}
Hello, I try to connect a Controller to Azure IoT Hub using a Root Certificate put on the controller in /etc/ssl/certs und SAS Token for IoT Hub instead of X.509 certificates. The TLS Handshake is successful when I test in terminal using openssl. It seems that the Controller doesn't start this process. I use the Azure IoT Hub library and the Net Base Services. Is there something left or something you can recommend? Best regards Mo
Last updated: 2026-04-24

Post by mohi on Connect to Azure IoT Hub ^{CODESYS Forge talk (Post)}
Hello, I try to connect a Controller to Azure IoT Hub using a Root Certificate put on the controller in /etc/ssl/certs und SAS Token for IoT Hub instead of X.509 certificates. The TLS Handshake is successful when I test in terminal using openssl. It seems that the Controller doesn't start this process. I use the Azure IoT Hub library and the Net Base Services. Is there something left or something you can recommend? Best regards Mo
Last updated: 2026-04-24

Post by jgalaska on SMC_Trafo 6DOF Config Error ^{CODESYS Forge talk (Post)}
Hello, Recently I was trying to run 6DOF robot in codesys via SMC_Trafo_ArticulatedRobot_6DOF, unfortunately no matter what parameters I tried, it always outputs InvalidConfig Error. I saw the same issue in a topic: https://forge.codesys.com/forge/talk/Motion/thread/16e1f0327f/ But if I understand correctly, the user solved it by developing his own version of this block. I wanted to know if it is a bug in the library (SM3_CNC 4.20.0.0) or am I doing something wrong? Can anyone confirm that they can use the FB without it reporing the Error? Kind regards,
Last updated: 2026-01-21

Post by gland on Open project automatic with correct version ^{CODESYS Forge talk (Post)}
Goodmorning, The projects we have made (with several persons) are in differents versions, Codesys V3.5 sp18 patch4, V3.5 sp19 patch 2, V3,5 sp19 patch 5 etc V3.5 sp21 patch 3 etc.. Now when we're opening an project thats's not opend before on my pc and we're not sure in witch version it's made it's quite annoying. We don't want to update to the newest version. Is there a way that it's automatic opening the correct version? Is there a program/tool/easy way to do this? Thanks,
Last updated: 2026-01-27

Post by aapostolidis on _NEW when used with classes and interfaces. Interface shows "Hidden Instance" in watch. ^{CODESYS Forge talk (Post)}
Hello, im using dynamic memory allocation with the NEW()-operator. When i instanciate a class with the NEW()-operator and want to debug/watch the interface of the class, the watch is only showing "Hidden Instance" (See attached screenshot). Is there any possibility to debug the interface data ? The interface is working properly but the debugging by the watch is not possible, what is a big disadvantage. Thank you. Best Regards, Alexander
Last updated: 2026-03-24

Post by jinlee on Dynamic I/Os Mapping ^{CODESYS Forge talk (Post)}
Hi guys, Recently, I am working at the Dynamic I/Os mapping feature in Ecockpit or Codesys v3.5. I have been trying the libraries. However, it looks like it will not work as I wanted. I want to build the PLC which can detect all the I/Os itself and from there, I can do something on these channels. For example, the current setup is one digital input card, one digital output card and one analogue input card. Then, I want to add one more card into the setup e.g. one more digital input. Then, wago screen can detect this and we can assign them to tasks for example to control digital output. May I know is it possible ? Kind regards
Last updated: 2023-08-18

Post by joschi2804 on Licensing info not available. ^{CODESYS Forge talk (Post)}
Hi, maybe this fixes your problem. At least this was our issue back then. We tried to run the codesys runtime environment on an embedded Linux system. The problem on our side was that we changed the WORKDIR directory in the /etc/init.d/codesyscontrol script to /home/user/codesys, but we forgot to copy all files (including the hidden files) from the initial WORKDIR (I am not sure but I guess the initial WORKDIR was /var/opt/codesys) to the new one. After copying those files and restarting codemeter and codesyscontrol, we were able to upload licenses. Hope this help BR Josef
Last updated: 2024-07-10

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