Post by kevinm on Attaching Trace variable to Frame Configuration Variable ^{CODESYS Forge talk (Post)}
Is it possible to show a variable from a Frame Configuration in a Trace on that Visualization? I want to pass the FB for an AXIS_REF_ETC_SoE_Standard to the visualization and display live axis data in the visualization. However, I cannot find a way to use a Frame Configuration variable in the Trace Configuration dialog.
Last updated: 2025-04-04

Post by andrej on Creating, using an external Function. ^{CODESYS Forge talk (Post)}
Hello, many thanks for your reply. I checked the logs. It seems that dll is not loaded. However other dll such as the Webserver are loaded. Could you tell me what I need to do such that my dll is loaded. (Furthermore I changed the C-Function a bit. I used the M4.exe from the SDK.) Many thanks.
Last updated: 2025-04-23

Post by dnordenberg on BOOL variable in OPC UA and modbus simultaneously ^{CODESYS Forge talk (Post)}
How can I have an BOOL variable that is read/write in both modbus TCP server and from OPC UA at the same time? Variables with %MX.n %QX.n addressing which is used for BOOL/coils in modbus server is not allowed in OPC UA symbol list on Schneider M251 controllers. I have already asked on Schneiders forum but there are not a lot of codesys experts over there :( So OPC symbols can't have a address and the modbus TCP server needs a address. So how should I do it then? It seems like an impossible combination. Since I want read/write access from both ways I can't just simply make a second variable and assign it the value of another since it would be a one way assignment. I also tried using VAR_CONFIG which then makes the address syntax %Q or %M in my main variable list and that fools OPC UA Symbol Configuration to allow it and then I add the complete %MX.n address of it in the VAR_CONFIG list. This semi works, I can toggle the BOOL from modbus but the OPC UA symbol seems to be read only. It displays symbol status but nothing happens when I toogle it. I think I need another way to have the variables and symbols pointing to the same bits in memory... My plan B is to write a BOOL array compare FB that saves a history bit from previous cycle and if that does not match current status at next cycle for either the OPC symbol or the modbus variable then it copies the new status over to the other. Maybe ugly but it's like my last alternative. Kind regards David
Last updated: 2025-07-14

Post by timvh on Reading multiple lines from csv file ^{CODESYS Forge talk (Post)}
Not sure, but maybe before you enter step 5, set i, lineindex and charIndex to 0. And the buffer variable should have a size bigger than 1 line. Additionally I think you should set bufferstart to 0 before you enter step 5. And in the OSCAT function you always point to the buffer address, but shouldn't this be (buffer + bufferstart)?
Last updated: 2025-07-23

Post by davemansell on control loop library IIR filter ^{CODESYS Forge talk (Post)}
Hi there i am experimenting with the IIR filter from the control loop library but have been unable to get it to function no matter what inputs I set I get errorID of wrong_configuration (3). Does someone have a working example that they can share. Best regards Dave
Last updated: 2025-07-29

Post by astrum on OPC UA Information Model Error "Dimensions must be empty" ^{CODESYS Forge talk (Post)}
Hello everyone, does anyone know what this error means: Internal Error in code generation for http://opcfoundation.org/UA/DI/: Dimensions must be empty. I use the standard information models from Codesys and haven't even called the Information Model, but my program can't compile. the only thing I did was to insert the Communication Manage.
Last updated: 2025-08-11

Post by davemansell on explicit cast ENUM to UINT and vice versa ^{CODESYS Forge talk (Post)}
This is from sometime ago but below might help someone else; this could be done via POINTERS. Make sure you protect for NULL pointers etc if you take this approach. // DECLARATION myEnumValue : enumMyEnum; u8 : USINT; pmyEnumValue : POINTER TO enumMyEnum; pu8 : POINTER TO USINT; // CODE pu8 := ADR(u8); pmyEnumValue := pu8; myEnumValue := pmyEnumValue^; // dereference the pointer
Last updated: 2025-08-21

Post by davemansell on explicit cast ENUM to UINT and vice versa ^{CODESYS Forge talk (Post)}
This is from sometime ago but below might help you could do this via POINTERS. Make sure you protect for NULL pointers etc if you take this approach. // DECLARATION myEnumValue : enumMyEnum; u8 : USINT; pmyEnumValue : POINTER TO enumMyEnum; pu8 : POINTER TO USINT; // CODE pmyEnumValue := pu8; myEnumValue := pmyEnumValue^; // dereference the pointer
Last updated: 2025-08-21

Post by antonz on CoDeSys v3.5: creating libraries for both 32-bit and 64-bit controllers ^{CODESYS Forge talk (Post)}
Thanks Tim. I would think it somehow is relevant when creating a compiled library, but that may very well not be the case. If I understand you correctly, then the same compiled library created from my source code would work for both 32 bit as well as 64 bit controllers.
Last updated: 2025-09-01

Post by alexgooi on Execute a .py file with Codesys ^{CODESYS Forge talk (Post)}
Hello yann, In the past I have experimented with the execution of Linux commands using Codesys. Maybe this article helps: https://www.linkedin.com/pulse/run-linux-commands-from-codesys-jouke-aalvanger When you are able to execute Linux commands in Codesys, you can run the Python script.
Last updated: 2025-09-03

Post by kporter on Removing <Empty> node in Device Tree ^{CODESYS Forge talk (Post)}
I initially created a SoftMotion axis for my EtherCAT CoE drive. I wanted to change it to use SoftMotionLight so I deleted the SM node, which left an <empty> node. I created the SML device, but the <empty> node remains. How can I remove that from the tree? </empty></empty>
Last updated: 2025-09-06

Post by bilalchaudhry33 on IFM Controller CR7XXs ^{CODESYS Forge talk (Post)}
HI, I am new to Embedded and telematic field . I am using codesys to program IFM controller and try to communicate two IFM controller over the CAN bus. I need some help and link tu tutorial I have no idea about codesys . I want to do in ST. I am using CAN RAW library from IFM . On following SS there is red triangle on CAN as well.
Last updated: 2025-09-24

Post by mondinmr on What happened to Python? ^{CODESYS Forge talk (Post)}
What happened to Python? I’ve just installed version 3.5.21.3 of the CODESYS development environment. I’m coming from 3.5.19.5. What happened to Python scripting! We rely heavily on it for the automatic generation of thousands of lines of code! It seems absurd to me that such an important feature has been removed!
Last updated: 2025-10-01

Post by rene2 on How can you get the active frame index from a frame ^{CODESYS Forge talk (Post)}
I think I struggle with the same issue. I tried the currentVisu variable but this is the active Visualisation. I have a dialog with a frame with frame configuration like in the picture. I would like to use the index te be used to make a button look like it's pressed/selected.
Last updated: 2025-10-14

Post by snhatton on OPC UA: How to change NodeId ?! ^{CODESYS Forge talk (Post)}
You can change the node id by adding the following to /etc/CODESYSControl.cfg: [CmpOPCUAProviderIecVarAccess] CustomNodeName=MyPLC123 Then restart the runtime and the new Node name will appear with the connection. I don't know if it's possible to remove the |var| from the name. I hope this helps!
Last updated: 2023-12-11

Post by zatalian on Codesys Control for Raspberry Pi 4.10.0.0 - Raspberry Pi OS > 2023-12-05 ^{CODESYS Forge talk (Post)}
I tried both 3B en 4. But every time with a lite version. I didn't try the full version of raspberry pi os. Nice to hear you are aware of the problem and trying to fix it. I'll hold on to the image from 2023-10-10 for now.
Last updated: 2023-12-12

Post by nz-dave on Bool turning on in case stament in wrong state? ^{CODESYS Forge talk (Post)}
pretty sure its not. ive done a cross reference and only have one write that sets it to true. Only way i can stop it is to remove the function block call from the main pou that is running said case. its got me stumped:/
Last updated: 2023-12-16

Post by preimesbergert on Codesys Control for Raspberry Pi 4.10.0.0 - Raspberry Pi OS > 2023-12-05 ^{CODESYS Forge talk (Post)}
Same issue here: Raspberry Pi 4 Model B HW 1.5 Regardless of the image (tried 32bit / 64bit version from Raspberry Pi Imager- all the "standard version") and with all tested Codesys Control versions (4.2.0, 4.8.0, 4.10.0) and regardless if single core / multicore / 64 bit variant.
Last updated: 2023-12-21

Post by dhumphries on Execution Order of Function Blocks ^{CODESYS Forge talk (Post)}
Function blocks in a SFC are executed left to right, top to bottom, instructions in ST are executed from left to right top to bottom as well. I think you are asking about the execution of POUs although you use the name function block, I believe POUs are executed in the order they are shown under the main task.
Last updated: 2023-12-28

Post by pmasip on Codesys Control for Raspberry Pi 4.10.0.0 - Raspberry Pi OS > 2023-12-05 ^{CODESYS Forge talk (Post)}
So none of the images from the 64bit archive work with any Codesys Control versions? I have tried the last Pi OS with every Codesys Control version and they don't work. I was wondering if there's any stable combination of versions.
Last updated: 2024-01-04

Post by tvm on Cannot pass array of constant size to a function as a reference ^{CODESYS Forge talk (Post)}
It will be a reference, because it's a VAR_IN_OUT. it's a little weird debugging the array online. It just shows as a POINTER TO INT, and you can't actually see the array from the function side. But you can still work with it as a normal array, not a pointer.
Last updated: 2024-01-09

Post by hfelek on *SOURCEPOSITION* App = [Application] area=0, offset = 0 on default example ^{CODESYS Forge talk (Post)}
Hello, I am trying to run CmpTemplate component provided by Codesys for version 3.5.17. I call MyExternalFunction from the component but I get error as shown below. I see component is loaded successfully on runtime logs. I feel like I am missing something basically.
Last updated: 2024-01-15

Post by fcmtw on SDO generation ^{CODESYS Forge talk (Post)}
Hi, When I'm adding a CANOpen device in my WAGO CANOpen Manager, CODESYS automaticaly generates some SDO's that I can't directly disable. From what those SDO's are generated ? I'm not finding anything about it in the EDS files. Also, is there a way to disable the automaticaly generated SDO and execute the manualy created ones ? Regards, Florian
Last updated: 2024-01-23

Post by masmith1553 on SDO generation ^{CODESYS Forge talk (Post)}
If you add any device to the CANOpen Manager it will send messages to verify the device is on the network. Do you have the Enable expert settings check box checked in the General tab? have you added any SDOs in the SDOs tab? I avoid using the CANOpen Manager and just use the CAN_Tx and CAN_Rx blocks from the library.
Last updated: 2024-01-25

Post by davidbo on i2c How does CODESYS handle exception or error messages. ^{CODESYS Forge talk (Post)}
For Raspberry Pi I have made a python script which regularly read a bulk of data over the ic2 from a device. Sometimes I get an Exception an IOError. I assume similar things can happen in CODESYS. So how does CODESYS handle that? Can I get any info about such an event?
Last updated: 2024-02-07

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