Post by timvh on KeyPad Function in Visualization to fill a table ^{CODESYS Forge talk (Post)}
Create an array of STRING and 1 INT variable, e.g.: asMyString : ARRAY[0..9] OF STRING; iIndex : INT; Then place a "Table" object in the visualization: - link this to the string array variable. - Check the option "Use Template" - Then in the Input Configuration - add the "Write Variable" command Somewhere else add a "Combobox, array" - link this to the same array. - And link the index to the INT variable. In the Combobox, you can then select one of the strings from the array. The index variable will indicate which selection has been made.
Last updated: 2026-01-08

Post by i-campbell on build (F11) / generate code using a python script file ^{CODESYS Forge talk (Post)}
hello, please enjoy. # i-campbell 2024 import subprocess from scriptengine import * # with a project already open # save if not yet saved # check pool objects if it is a library # generate code only for the active application if it is a project # beep thanks to https://devblogs.microsoft.com/scripting/powertip-use-powershell-to-send-beep-to-console/ if projects.primary: # check project is open if projects.primary.dirty: # save projects.primary.save() if projects.primary.path.lower().endswith('.library'): projects.primary.check_all_pool_objects() # check all pool objects for lib else: projects.primary.active_application.generate_code() # generate if not lib # note, there could be more applications than the active application, # this script does not generate those else: system.write_message(Severity.Error,'no project open') ps_output = subprocess.check_output(["powershell", "-Command", "[console]::beep(500,300)"]) # beep
Last updated: 2024-04-10

Post by pistola on How to change font and font color rectangle/or related object ^{CODESYS Forge talk (Post)}
Here is the help sections for visual elements rectangle. https://content.helpme-codesys.com/en/CODESYS%20Visualization/_visu_elem_rectangle.html Under "Font Variable" there is "Color" which is a Dword, you can make a variable that changes colour within your code to the color needed. Note the format for the Dword variable is: colorVariable := 16#TTRRGGBB Where: TT = Transparency 00-FF RE = Red 00-FF GG = Green 00-FF BB = Blue 00-FF https://content.helpme-codesys.com/en/CODESYS%20Visualization/_visu_animate_color.html
Last updated: 2025-03-17

Post by schnepper on Minor UI bug: cannot create SFC POU after creating a Function POU ^{CODESYS Forge talk (Post)}
After creating a Function POU, it is not possible to then create an SFC POU. Steps to recreate: * Create a new Function POU. SFC is not allowed for Functions, so SFC does not show in the Implementation language dropdown. * Click Add Object -> POU... Function is selected for Type. * Select Program * SFC is not present in the Implementation language dropdown
Last updated: 2024-05-23

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 bruceae on Special Characters ^{CODESYS Forge talk (Post)}
Hello, I am fairly new to the codesys environment. Is there a reference chart that I can look at in order to write special character in a string? The Special characters that I need to inclue inside the string are as follows; Null Bell Carriage Return I have a TCP_Write command that I am sending to an external device. In order for that device to function properly it needs to see the string with the null and bell characters as the header, followed by the desired command, terminated with the carriage return. Any reference sheet or how to write this in the actual string would be greatly appreciated.
Last updated: 2025-08-26

Post by alimans on OPC-UA Server, Symbol Set: Raise an error: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Post)}
Hi everyone, I just created a very simple library without any code and, added it to my very simple project. after adding this library, I get an error when I try to open "Symbol Set" in "OPC UA Server" in "Communication Manager". Here is the code of my POU in the library: FUNCTION_BLOCK POU VAR eCommand : (CMD_NONE:=0, CMD_RESET:=-1) INT := CMD_NONE; END_VAR Attached is the error that I get. I also noticed that by removing the enumeration variable above (eCommand), I can open the "Symbol Set" again. Anybody has any idea why this error is raised and how could I use enumeration variables without error in "OPC UA Symbol Set"?
Last updated: 2024-08-08

Post by davidbo on All the things needed for anonymous login to OPC UA ^{CODESYS Forge talk (Post)}
I thought I knew what I am doing, but something is missing what? From Device-Communication Settings select from drop down menu "Device" Select entry "Change Runtime Security Policy" Check the "Allow anonymous login" Select "Symbol Configuration" in your application In settings check "Support for OPC UA features" Check some of the values you want in your set Press the build button in the "Symbol Configuration" Press the button "Configure Symbol Rights" Make sure that Anonymous_OPCUAServer has access right to your "default set" From Device-Communication Settings select "Access Rights" in RemoteConnections-OPCUAServer Anonymous_OPCUAServer should be given modify and view rights I suppose. I can connect with UaExpert but I cannot see my Application or browse my values. What is missing?
Last updated: 2025-09-10

Post by timvh on How to implement an interface (IElement)? ^{CODESYS Forge talk (Post)}
See: https://forge.codesys.com/prj/codesys-example/element-collect/home/Home/ This contains an application "OnlineChangeSafeLinkedListExample". What you should do is create a new interface which has your "Priority" property. Then your FB should extend the base element function block and implement your own interface: E.g. FUNCTION_BLOCK MyElement EXTENDS COL.LinkedListElementBase IMPLEMENTS I_MyInterface Then the __QUERYINTERFACE does the magic to check if your "element" also implements your interface. Something like this: // Compares this element with itfElement. // Returns 0 if the elements are equal, < 0 if the element is less than itfElement, // > 0 if the element is greater than itfElement. // This method will be called from sorted collections (e.g. |COL.SortedList|) to sort the elements. // IMPORTANT: The underlying value to be compared with MUST NOT be changed during the lifecycle of the object. METHOD ElementCompareTo : INT VAR_INPUT (* The element to compare*) itfElement : COL.IElement; END_VAR VAR itfIntElement : I_MyInterface; xResult : BOOL; END_VAR // We use integer iInt1 for sorting. xResult := __QUERYINTERFACE(itfElement, itfIntElement); IF xResult THEN IF iInt1 < itfIntElement.Priority THEN ElementCompareTo := -1; ELSIF iInt1 > itfIntElement.Priority THEN ElementCompareTo := 1; ELSE ElementCompareTo := 0; END_IF ELSE ElementCompareTo := -1; END_IF
Last updated: 2024-07-22

Post by eschwellinger on Webvisu NO load ^{CODESYS Forge talk (Post)}
check the plclogger for this situation
Last updated: 2023-09-21

Post by callumo1 on Check For Open Dialogs On Client ^{CODESYS Forge talk (Post)}
Okay, Thanks for the help
Last updated: 2023-09-26

Post by eschwellinger on Loosing connection to emulation running on Linux ^{CODESYS Forge talk (Post)}
check the plc log /var/opt/codesys/codesyscontrol.log
Last updated: 2024-09-19

Post by ellocco on Problems with simulation in Window 10 ^{CODESYS Forge talk (Post)}
@fscardovi You might check the location of your CODESYS.exe.
Last updated: 2024-10-16

Post by eschwellinger on MQTT QoS 1 & 2 ^{CODESYS Forge talk (Post)}
give us a little more time to check.
Last updated: 2024-10-29

Post by eschwellinger on The application does not exist on "device" ^{CODESYS Forge talk (Post)}
please check the plc logger for more details
Last updated: 2024-12-17

Post by jbu0105 on Dynamic limits invaild ^{CODESYS Forge talk (Post)}
Hi Georg, Thanks for your answer.It was the double check ;)
Last updated: 2025-04-10

Post by paro on Multicast udp ^{CODESYS Forge talk (Post)}
did you check this example: https://forge.codesys.com/prj/codesys-example/nbs/home/Home/
Last updated: 2024-01-15

Post by eschwellinger on Estun servo with codesys ^{CODESYS Forge talk (Post)}
you need to add the EDS file here to check..
Last updated: 2024-03-11

Post by eschwellinger on Licensing info not available. ^{CODESYS Forge talk (Post)}
check on cli on your device 'cmu -x'
Last updated: 2024-03-19

Post by installwhat on Camera Feed (CCTV) ^{CODESYS Forge talk (Post)}
https://www.youtube.com/watch?v=y_l2siXY7dA check the project from this video
Last updated: 2024-06-23

Post by eschwellinger on Unrecoverable SoftMotion state after switch to PreOp ^{CODESYS Forge talk (Post)}
i would recommend to check the plc log..
Last updated: 2025-10-23

Post by atone on CAA File Handling: "Read only" error ^{CODESYS Forge talk (Post)}
In case of error while opening the file to read you assume that the file doesn't exist and try to create one. But it could be that the SD card is not ready yet or simply not there. I would try to check first if the SD card is there and accessible. Otherwise with FILE.Create you could end up creating a new directory that is not mapped to the SD card. This would explain the errors even after a reboot, though it doesn't explain the READ_ONLY_CAA error I guess? I would use FILE.DirOpen and FILE.DirList to check if the SD card is there and ready.
Last updated: 2025-03-20

Post by konstantin on Lenze i950 Servo and WAGO PFC200 ^{CODESYS Forge talk (Post)}
Hello, In our workshop we have a Lenze i950 servo drive that has an EtherCAT bus and CiA402 compatibility. The WAGO is PFC200 750-8212 and as per documentation it has built-in license for SoftMotion Light functionality. It is not capable of supporting the full SoftMotion functionality like gearing and synchronizing. I added the EtherCAT esi files from Lenze and the EtherCAT master does see the drive, then I added a SoftMotion Light Axis object. The problem is that I can only energize the axis, I cannot execute any other commands. I set the positive and negative torque limits from the PDOs to 200% and when I try to move the axis by force it does not move back to its original position. I use the SML function blocks from the PLCOpen library and the error from the function blocks is that the op mode cannot be changed. Then I tried using a standard SoftMotion axis object and everything works fine, except the MC_Home function block. The axis moves back to its position when forced out of it. I follow this guide from Lenze - Lenze i950 CODESYS V3 What could cause this issue with the SoftMotion Light axis object? Best Regards Konstantin Kolev
Last updated: 2026-02-11

Post by simotion on Axis variable indicating modulo of finite setting ^{CODESYS Forge talk (Post)}
What variable of the axis indicates it is a modulo of finite axis? I want to check that in the code, to adopt my motion code between the two types.
Last updated: 2023-11-24

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