Post by kuegerls on SysProcessExecuteCommand2 and CANopen Device ^{CODESYS Forge talk (Post)}
4.10.0.0
Last updated: 2024-06-24

Motion 🇬🇧 ^{CODESYS Forge talk (Discussion)}
Realizing single or multi axis motion control, CAM, CNC and Robotic applications
Last updated: 2026-04-13

Forge 🇬🇧 ^{CODESYS Forge talk (Discussion)}
Discussions about CODESYS Forge projects and features of the CODESYS Forge website
Last updated: 2026-03-17

Runtime 🇬🇧 ^{CODESYS Forge talk (Discussion)}
Related questions to SoftPLCs e.g. Raspberry Pi, Beaglebone, IoT2000 and other platforms
Last updated: 3 days ago

Post by otbeka on CAA File Handling: "Read only" error ^{CODESYS Forge talk (Post)}
Hi, On CODESYS V3.5.19.50 I am using the latest 3S File Access library (CAA File & CAA Types) to save and retrieve configuration data from the User Data section of an SD card, via file called config.txt. The application reads the file to memory once upon initialisation, and then the only other operation is overwriting the file with the updated configuration whenever the user changes the settings. An issue is ocurring, seemingly randomly, where the config.txt file, and all surrounding directories, cannot be written to by the unit, returning a READ_ONLY_CAA error upon file open. This sometimes does not clear even after power-cycling the PLC several times, yet checking the file permissions with ls -l shows normal read, write, and execute access. I am wondering if this is caused by the PLC itself or by an issue in my application. I have included my CAA File handler function block (SD_Card_Bin(FB).txt) and any associated types/calls below: TYPE ConfigData : STRUCT Config : ARRAY[0..256] OF STRING(64); NumberOfStrings : UDINT; END_STRUCT END_TYPE TYPE Buffer : STRUCT Data : ARRAY[0..SIZEOF(ConfigData)] OF BYTE; DataLength : UDINT; END_STRUCT END_TYPE A case within my MAIN PRG: mode.WriteConfigDataToFile: VisuElems.CURRENTVISU := 'Screen_Write'; IF xModeHasChanged THEN iErrorCount := 0; iRoute := 0; END_IF CASE iRoute OF 0: inBuffer := ConfigData_To_Buffer(GVL.UnitData); xConfigError := FALSE; xDataConfigured := FALSE; iRoute := 1; 1 : //Read Data from Card SD_Card_Bin.strFileName :=FileName; SD_Card_Bin.iFileOperation := 2; SD_Card_Bin(xExecute :=TRUE, WriteBuffer := inBuffer, xDone =>xDataConfigured, xError=>xConfigError, strErrorCodes=>strError); IF xDataConfigured THEN SD_Card_Bin(xExecute :=FALSE); IF xConfigError THEN iRoute := 32767; ELSE iRoute :=100; END_IF END_IF 100: // The end bCurMode := mode.DisplayProcessVariables; 32767: // Config error iErrorCount := iErrorCount + 1; IF iErrorCount > 2 THEN // Repeats 3 times, if no progress abandons and returns error bCurMode := mode.WriteError; ELSE iRoute := 0; // Try again END_IF END_CASE I'd like to rule out my application as the cause of this bug - help via comments or criticism would be greatly appreciated.
Last updated: 2025-03-19

Post by arvind on communication ^{CODESYS Forge talk (Post)}
HI All past two weeks im trying to configure and establish communication between wago rs485 fieldbus coupler(750-315/300-000) with wago pfc 200 plc but not able to communicate can you peoples help me to configure and establish communication using codesys v3.5 and above
Last updated: 2023-08-19

Post by davidbo on How to switch between dynamic IP address and dynamic? ^{CODESYS Forge talk (Post)}
Well. One can do that, I have found a python script which can modify /etc/dhcpcd.conf and I suppose there is a way I can execute it from CODESYS and it seems to be the only way
Last updated: 2023-11-08

Post by ellocco on Leitungsverzweigung mit einem existierenden Block (z.B. AND-Glied) zu verbinden ^{CODESYS Forge talk (Post)}
Thanks for your response and your idea. To sum up, you also have no idea how to connect two existing blocks. Meanwhile I worked with "PLCnext engineer" and the result is:
Last updated: 2024-11-11

Post by ojz0r on Multiple applications on one device sharing variables. ^{CODESYS Forge talk (Post)}
One thing you could do is create an object with the variable as field with a function and procedure to get the variable (read) and set the variable (write). These are then called from your program and the vizualization.
Last updated: 2025-02-20

Post by davidbo on SQLite with AC_Datalog and Raspberry Pi ^{CODESYS Forge talk (Post)}
I am using V3.5 SP20 and version for AC_Datalog is 4.3.0.0 But in the log I get "DataLogStorage_SQLite: Not able to open table." Why and how to fix that?
Last updated: 2025-08-14

Post by eschwellinger on function block output ^{CODESYS Forge talk (Post)}
I think you should use a piece of hardware in between your drive (pulse/direction) and the plc like for example Beckhoff EL2521 - so Ethercat might be to choice if you need CNC and SoftMotion. EK1100 and EL2521
Last updated: 2024-01-05

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 dominggus on Recipe Manager - RecipeManCommands, load & write wrong values, Bug? ^{CODESYS Forge talk (Post)}
I've workaround it by not using an array but 30 instances of the struct and putting these in the recipe, and then using converter functions to save and load
Last updated: 2024-03-02

Post by jetme on Rampup and rampdown ^{CODESYS Forge talk (Post)}
i'm using FB Ramp_INT function to ramp my pump up and down but I will like to ramp up at a different time and also ramp down at a different time. How can I do that.
Last updated: 2024-03-28

Post by jeroenaero on Difference between using OPCUA symbol configuration and OPCUA Server object ^{CODESYS Forge talk (Post)}
Hi, What is exactly the difference between using symbol configuration as OPCUA server or using the Codesys object OPCUA server? What are the advantages and disadvantages of using symbol configuration and OPCUA server object. Please let me know
Last updated: 2025-10-30

Post by kalmeyer on Stepper motor control with (SM_Drive_RaspStepper_direct) ^{CODESYS Forge talk (Post)}
I have installed: SM_Drive_PosControl 4.18.0.0 and SM_Drive_RaspiStepper_Direct 0.0.0.7 and SM_Drive_RaspiStepper_PulsDir 0.0.0.7 And when I "Generate Code" I immediately get 6 errors (see attached file) What can I do?????
Last updated: 2025-11-09

Post by jackbrady on Function Blocks and arrays of function blocks ^{CODESYS Forge talk (Post)}
Hello, I am new to Codesys and PLC programming in general (please go easy ha!) I'm not looking for code to be written for me just some help and pointing in the right direction. I am writing some code to send commands to a relay based on input values (to put it simply). Quite basic stuff. I have wrote a function block that takes a global variable (Open_command:BOOL) and outputs to another global variable (Opened : BOOL). The function block is simulating a device so I'll eventually get the globals from that. I now need to create multiple versions of this function block/ device (lets say 100) but I need each iteration of that function block to reference it's own relevant global variable. I think that the best way of doing this would be to use arrays, although I could be wrong. I am aware that for up to 100 instances I could very well manually assign everything but that seems rather time consuming and I want a fancier way of doing it. Here is a very basic example of what I am looking to do, please note I have not written this in proper code it's just to show what I mean. Global Variables V[0-100] int Open_command [0-100] Bool Opened [0-100] Bool Function Block var input x : BOOL Var output y : BOOL if x then y = TRUE ELSE y = FALSE The input to my function block will be Open_command, output will be Opened Example code. If V[x] > 10 then Open_command [x] = TRUE ELSE Open_command [x] = FALSE (So when V1 goes above 10 I need Open_command1 = TRUE therefore initiating FB1 output. V2 > 10, open_command2 = True > FB2 output V3 > 10, open_command3 = True > FB3 output ... ... ) What I can't seem to figure out is how to tie all this together, I have read through the codesys documentation and if anything it has confused me more! ha. Apologies for the poorly written post but hopefully you understand what I am trying to get at. Thanks, Jack
Last updated: 2024-02-14

Post by herbasso88 on WebVisu flickering ^{CODESYS Forge talk (Post)}
Good morning, I'm new on Codesys Forge, so I'm not sure if this is the right place to talk about my problem. When I open my WebVisu pages with Microsoft Edge, or Chrome, the background and also some rectangles blinking without reason!!! The application is developed with Codesys 3.5.17.10 and run on Codesys HMI, same version (3.5.17.10). After several experiments I discover that the problem happens when I made dynamic the "End of area" property of a meter object, but I can't understand why this blinking problem happens. Also, the problem is only at the WebVisu page, the "normal" VISU pages (the ones opened when Codesys HMI start) work always perfectly. Another strange thing is that the problem happens only if on the same page, where there is the meter object, there is also a trend object!?!? Codesys HMI is running on a Virtual Machine (VMware Workstation 15 player, v.15.5.6) running Windows 10 Pro N 64-bit. The blinking problem happen also if I convert the project to Codesys 3.5.20.0. This version of Codesys and Codesys HMI are installed on a Virtual Machine running Windows Server 2019 Standard 64-bit. In attachment the archive of my project. The attached project has only one page, if "Enable Counter" is not pressed the "End of area" variable of the meter is not updated in the software, and everything work well, normal VISU and WebVisu; if "Enable Counter" is pressed, the "End of area" variable of the meter is updated in the software, and the WebVisu page start blinking. I tried also to enable the "Support client animations and overlay..." property at VisualizationManager, this seems stop the blinking problem, but that property also destroy my WebPage, moving almost all the graphical object, that also seem not working anymore. I really need help to understand what I'm doing wrong, I have to develop a bigger project and I have to understand if trend objects and animated meters cannot stay in the same page. In the final project the WebVisu will be very important because the customer will use this way to access the application to monitor the process. Regards
Last updated: 2024-05-06

Post by thim on Bibliothek mit C-Library erzeugt unerwarteten Fehler beim Aufsetzen des Projekts. ^{CODESYS Forge talk (Post)}
Um eine C-Library als Codesys Bibliotheksfunktion zu erstellen, bin ich den fünf Videoanleitungen von https://de.codesys.com/news-events/gut-zu-wissen.html gefolgt. Das funktioniert auch am Anfang gut, ich kann unter x86-Linux und RasPi-Linux auch die C-Libraries kompilieren. Wenn ich dann die Library aber wie in Video 4 gezeigt in der Codesys-Bibliothek verknüpfen möchte, (siehe Screenshot) bekomme ich schon bei Auswahl der Datei und auch danach bei Klick auf "Geräte auswählen" den Fehler "Der Dateiname sollte mit dem Bibliotheksnamensraum enden." angezeigt. Meine *.so Datei endet aber meinem Verständnis nach mit dem richtigen Namen analog zum Beispiel und wie es auch in meinem Projekt heißt. Mir ist unklar, was mir diese Fehlermeldung anderes sagen will. Hat jemand eine Erklärung? (Codesys V3.5 SP 20 + (64-bit))
Last updated: 2024-08-22

Post by struccc on Problem Update new version Master ethercat ^{CODESYS Forge talk (Post)}
Hi, I had some issues as well migrating to the new version. What I have learnt: - Have to check all the libraries in the library manager, if they are the proper versions. - Some other parts of the application, maybe an old library referenced by another one can keep the old Ethercat libraries.... Use the "Placeholders" function on the library manager - See if there is a new version available of the slave "devices". Might just have to update them ... I had problems moving from 4.7 to with 4.8, especially with the 2nd adapter for redundancy - some devices failed to initialize properly.... So I have just downgraded those libraries now. P.
Last updated: 2024-10-28

Post by tehthoams on Find Function: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Post)}
Hey, Sorry this isn't super helpful, but i had this problem once and was able to resolve it. I can't recall how I solved it and whether it was a problem with my codesys installation or the project itself. If it is the codesys installation, make sure all your required libraries and plugins are installed and available. compare with a colleagues installation if possible. I vaguely recall saving a copy of my project and deleting things one by one until the error went away...
Last updated: 2023-10-30

Post by tehthoams on Find Function: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Post)}
Hey, Sorry this isn't super helpful, but i had this problem once and was able to resolve it. I can't recall how I solved it and whether it was a problem with my codesys installation or the project itself. If it is the codesys installation, make sure all your required libraries and plugins are installed and available. compare with a colleagues installation if possible. I vaguely recall saving a copy of my project and deleting things one by one until the error went away...
Last updated: 2023-10-30

Post by wayne-riesterer on Assignment Efficiency - Repetitive Assignment vs IF statement ^{CODESYS Forge talk (Post)}
Hello Can anyone see any problems with constant assignment as in the following statement: Coils[0] := Coils[0] OR (Buttons[0] AND Sensors[0] > 6); Rather than using the more verbose and vertically-larger: IF NOT Coils[0] AND Buttons[0] AND (Sensors[0] > 6) THEN Coils[0] := TRUE; END_IF Also, is the test expression short-circuited in the latter case? In other words, will the runtime move on after it sees Coils[0] = FALSE AND? Thanks
Last updated: 2025-03-07

Post by otdeveloper on IEC 61499 ^{CODESYS Forge talk (Post)}
It is being worked on by many companies and its even-driven function blocks seem like a natural evolution of the object oriented industrial programming I have seen Gary Pratt (author of the Book of CODESYS and much more) so expertly implement and explain. I would expect CODESYS to have this front and center on their sights and, if they do not, I would be very interested in learning why.
Last updated: 2024-02-09

Post by pbitalc on Customize Users and groups Visualization in UserMgmtConfig ^{CODESYS Forge talk (Post)}
Hi, I have the user situation represented in the image and I would like CustomerAdmin to only be able to modify/add/delete users relating to the CustomerUser group and nothing else. How can I do? It would be enough not to display the users belonging to the SuperAdmin, Technician1 and Technician2 groups and also the related groups in the UserMgmtConfig dialog box. Can anyone help me? I use Codesys 3.5.16 Thanks!
Last updated: 2024-02-29

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